File: OSC.PG of Disk: Disks/PDP8-Net/multos8
(Source file text)
FILE MULTOS-8 HARDWARE PROCESSOR TITLE HARDWARE PROCESSOR EDIT NUMBER * * MULTOS was purchased in a group purchase and put into the * PUBLIC DOMAIN. It can be freely distributed. * WALLY KALINOWSKI 213 336-6940 * 18925 Felbar * Torrance Cal. 90504 * Copyright (C) 1978, 1979 by Computer Methods * 7822 Oakledge Road * Salt Lake City, UT 84121 * Phone 801-942-2300 * * Unauthorized reproduction in whole or in part * by any means whatsoever without written authorization * from Computer Methods is strictly prohibited by law. * FREE 1 FOR PATCHING * *EDIT EQU 797 14 JUL 1978 *SPLIT THE SOURCE FILE INTO SEVERAL SMALLER FILES. *OSC CONTAINS THE HARDWARE INTERRUPT PROCESSOR * EDIT3 EQU 390 19 Aug 79 * * EDIT HISTORY * *EDIT DATE REASON *311 24 SEP 78 CORRECT BUG IN DSKQCHK *312 24 SEP 78 INCREASED TIME IN 'DTGO' TIMEOUT LOOP *313 24 SEP 78 CHANGED 3 TO 4 FOR REVERSE DECTAPE AT 'D7A' *314 28 SEP - 1 OCT 78 ADDED PERTEC DISK SUPPORT *315 2 OCT 78 ADDED NON-CONTIGUOUS MEMORY SUPPORT *350 4 OCT 78 ADDED DATA PRINTER V132 SUPPORT *371 25 OCT 78 MAINTENANCE *372 26 OCT 78 ADDED POWER UP PRINTER ENABLE CHARACTER *373 1 NOV 78 MAINTENANCE *374 2 NOV 78 MAINTENANCE *376 4 Nov 78 Maintenance *378 4 Nov 78 Added automatic memory size determination *379 11 Nov 78 Maintenance *380 17 Nov 78 Maintenance *381 18 Nov 78 Maintenance *382 24 Nov 78 Maintenance *384 4 Jan 79 Added '.END' Macro *386 7 Feb 79 Fixed bug re system halt for bad RK05 #0 sector. *387 9 Jun 79 Added clear printer keyboard flag instruction. *388 12 Jul 79 Added extended time quantum for compute-bound jobs. *389 13 Aug 79 Added support for 6 terminals. *390 19 Aug 79 Ditto. TITLE PAGE ZERO * FIELD 1 DSEC * QPCSV DC 0 INTERRUPT PC BROUGHT UP FROM FIELD 0 AS 6,KHLT SAFETY AND ODT * NULLPTR DC 0 USED BY NULL JOB * AXR DC 0 AUTO-INDEX REGISTERS AXR1 DC 0 AXR2 DC 0 AXR3 DC 0 AXR4 DC 0 DTADDR DC 0 USED BY TD8E DECTAPE AXR6 DC 0 USED BY RX8E FLOPPY ROUTINES AXR7 DC 0 USED BY RX8E FLOPPY ROUTINES * JOB DC 0 CURRENT JOB INJOB DC 0 JOB CURRENTLY SWAPPING INTO MEMORY * * HARDWARE INTERRUPT REGISTER STORAGE * FLSV DC 0 CPU FLAGS ACSV DC 0 AC MQSV DC 0 MQ SCSV DC 0 STEP COUNTER/EAE MODE FORMAT: * BITS 0-5 UNUSED * PDP-8/I FORMAT: * BITS 7-11 CONTAIN STEP COUNTER * PDP-8/E FORMAT: * BITS 6-10 CONTAIN STEP COUNTER * BIT 11 CONTAINS MODE: * (0=MODE B, 1=MODE A) TEMP DC 0 GENERAL PURPOSE TEMPORARY CNTR DC 0 GENERAL PURPOSE COUNTER PNTR1 DC 0 GENERAL PURPOSE POINTERS PNTR2 DC 0 PNTR3 DC 0 * * FIELD INFORMATION WORDS * THESE WORDS DESCRIBE THE ACTIVITY IN EACH MEMORY FIELD * BIT(S) DESCRIPTION * 0 THIS FIELD IS THE JOB'S INST FIELD * 1 THIS FIELD IS THE JOB'S DATA FIELD * 2 THIS FIELD IS LOCKED IN CORE (UNSWAPPABLE) * 3 THIS FIELD DOES NOT EXIST * 4-5 RESERVED FOR FUTURE EXPANSION * 6-8 JOB'S RELATIVE FIELD NUMBER * 9-11 JOB NUMBER * FPNTR DC 0 POINTER TO ONE OF FIELD INFO WORDS FIELD0 EQU FPNTR USED FOR REFERENCE PURPOSES ONLY FPNTR2 DC 0 POINTER TO ONE OF FIELD INFO WORDS FIELD1 EQU FPNTR2 USED FOR REFERENCE PURPOSES ONLY FIELD2 DC 0 FIELD3 DC 0 FIELD4 DC 0400 Set to indicate non-existence FIELD5 DC 0400 FIELD6 DC 0400 FIELD7 DC 0400 * AIF NO:PTR,.PTR * * PR8-E STATUS REGISTERS * ########################################################## * ## THE READER IS ASSIGNED TO A SPECIFIC JOB ## * ## AND CAN ONLY BE ACCESSED BY THAT JOB ## * ########################################################## * READER DC 0 NEGATED READER JOB NUMBER RBF DC RB READER BUFFER FILL POINTER RCNTR DC -128 READER CHARACTER COUNTER * .PTR ANOP * AIF NO:PTP,.PTP * * PP8-E STATUS REGISTERS * ########################################################## * ## THE PUNCH IS ASSIGNED TO A SPECIFIC JOB ## * ## AND CAN ONLY BE ACCESSED BY THAT JOB ## * ########################################################## * PUNCH DC 0 NEGATED PUNCH JOB NUMBER PBE DC PB PUNCH BUFFER EMPTY POINTER PCNTR DC -128 PUNCH CHARACTER COUNTER PMF DC 0 PUNCH MOTION FLAG * .PTP ANOP * * LA8-E LINE PRINTER STATUS REGISTERS * ########################################################## * ## THE LINE PRINTER IS ASSIGNED TO A SPECIFIC ## * ## JOB AND CAN ONLY BE ACCESSED BY THAT JOB ## * ########################################################## * PRINTER DC 0 NEGATED PRINTER JOB NUMBER LBE DC LPB LINE PRINTER BUFFER EMPTY POINTER LCNTR DC -128 LINE PRINTER CHARACTER COUNTER LMF DC 0 LINE PRINTER MOTION FLAG LEF DC 0 LINE PRINTER SOFTWARE ERROR FLAG * AIF NO:MAGTAPE,.CONT * MTJOB DC 0 HOLDS MAGTAPE JOB NUMBER (ALSO BUSY FLAG) MTQE DC MTQB MAGTAPE QUEUE BUFFER EMPTY POINTER MTTRF DC 0 MAGTAPE TRANSPORT READY FLAG * .CONT ANOP * AIF NO:DECTAPE,.DECTAPE * DTJOB DC 0 HOLDS DECTAPE JOB NUMBER (ALSO BUSY FLAG) DTQE DC DTQB DECTAPE QUEUE BUFFER EMPTY POINTER DTERR DC 0 ERROR RETRY COUNTER DTFUNC DC 0 FUNCTION WORD DTBLOCK DC 0 LOGICAL BLOCK NUMBER DTFPNTR DC 0 POINTER TO FIELD INFO WORD * AIF TD8E,.TD8E * CLA HLT * AGO .DECTAPE * .TD8E ANOP * DTCURB DC 0 TD8E CURRENT BLOCK NUMBER DTSUM DC 0 CHECKSUM DTPGCT DC 0 PAGE COUNTER DTWDCT DC 0 PAGE WORD COUNTER DTFLAG DC 0 TD8E CLOCK TICK COUNTDOWN FLAG DTCLOCK DC 0 TD8E CLOCK TICK COUNTER DTPNTR DC 0 TD8E POINTER DTCNTR DC 0 TD8E COUNTER DTTEMP QUT %*,* TD8E TEMPORARY DTCDF HLT 'DF' TO TRANSFER FIELD HLT JMPI DTCDF * .DECTAPE ANOP * * DISK STATUS REGISTERS * DSKJOB DC 0 CURRENT DISK JOB NUMBER DQF DC DQB DISK QUEUE BUFFER FILL POINTER DQE DC DQB DISK QUEUE BUFFER EMPTY POINTER DSKFUN DC 0 DISK FUNCTION WORD DSKCOR DC 0 DISK MEMORY ADDRESS DSKBLK DC 0 DISK BLOCK NUMBER BLOCKS DC 0 DISK ADDRESS PAGES DC 0 PAGE COUNT AIF SYS:DISK.NE.PERTEC,.CONT DSKCYL QUT %*,PAGES PERTEC DISK CYLINDER ADDRESS .CONT ANOP DSKCMD DC 0 DISK COMMAND DSKERR DC 0 DISK ERROR COUNTER DSKPNTR DC 0 POINTS TO DISK JOB WAIT WORD DSKTEM DC 0 DISK TEMPORARY * AIF NO:FLOPPY,.CONT * * RX8-E FLOPPY DISK STATUS REGISTERS * (BOTH FLOPPY DRIVES AND ALL 4 LOGICAL DEVICES * RXA0, RXA1, R0 AND R1 ARE ASSIGNED TO A SINGLE JOB.) * RXJOB DC 0 FLOPPY JOB NUMBER (ALSO BUSY FLAG) RXMDRW DC 0 FLOPPY COMMAND WORD RXQE DC RXQB FLOPPY QUEUE EMPTY POINTER RXERR DC 0 RX8E ERROR COUNTER RXTEM DC 0 JUST A TEMP RXTEM2 DC 0 DITTO RXTEM3 DC 0 DITTO RXTRACK DC 0 COMPUTED TRACK ADDRESS RXCNTR DC 0 SECTOR DATA COUNTER RXCONST DC 0 12-BIT WORD OR 8-BIT BYTE COUNT RXWC DC 0 TRANSFER WORD COUNT RXFUNC DC 0 FUNCTION WORD RXADDR DC 0 TRANSFER MEMORY ADDRESS RXLOGB DC 0 LOGICAL BLOCK NUMBER RXBLOCK DC 0 LOGICAL BLOCK WORKING LOCATION RXFPNTR DC 0 POINTER TO FLOPPY FIELD INFO WORD RXTBLK EQU * USED BY RXST8 TO CALCULATE SECTOR RXCDF HLT SUBR TO CHANGE DF TO TRANSFER FIELD HLT JMPI RXCDF * .CONT ANOP * * EXECUTE ANY INSTRUCTION * (HAVING THIS ON PAGE ZERO REMOVES 'DF' SETTING PROBLEMS.) * ANY HLT QANY HLT JMPI ANY NO SKIP INC ANY SKIP JMPI ANY * * NEW INSTRUCTIONS * PARAM EQU 04400+* GET A JOB PARAMETER QPARAM * QSUSP DC SCHEDULER POINTER TO SCHEDULER * QXDISK DC QEXDISK POINTER TO SCHEDULER * LOCATIONS USED BY QEXDISK QFUNC DC 0 FUNCTION WORD QADDR DC 0 CORE ADDRESS QBLOCK DC 0 DISK SECTOR ADDRESS * * REGISTERS USED BY THE SCHEDULER * SKEDJOB DC 0 LAST JOB CHECKED FOR 'RUNABILITY' SKEDPTR DC 0 POINTS TO USER STATUS INFO SKEDCTR DC 0 COUNTS THE JOBS SKEDTEM DC 0 SCHEDULER TEMPORARY SKEDDW DC 0 SCHEDULER DEVICE WAIT BITS SKEDLW DC 0 SCHEDULER LOGIC WAIT BITS * * MISCELLANEOUS REGISTERS * TIME AS 2 DOUBLE PRECISION TIME IN CLOCK TICKS * JTIME DC -QUANTUM JOB TIME QUANTUM (IN NEGATIVE TICKS) * TTYNUM DC 0 USED BY TTYRT * WTPNTR DC 0 WAIT POINTER USED BY ALL IOF HARDWARE ROUTINES * ALIGN * * Copyright Notice embedded within the code makes it * illegal to reproduce the object code without authorization. * TEXT /COPYRIGHT (C) 1978, 1979 BY COMPUTER METHODS,/ TEXT /7822 OAKLEDGE ROAD, SALT LAKE CITY, UT 84121, USA@/ * ISEC 0 ORG BUFFEND * * PARAMETER POINTER FETCH ROUTINE (IOF) * PART ROOM 10 QPARAM SUB CDF %* SNA USE CURRENT JOB ? TAD JOB YES MULT64 TAD =JOB1-USER:ST TADI QPARAM GET THE PARAMETER INC QPARAM BUMP RETURN DCA PNTR1 CDF %TABLES RET QPARAM TITLE START OF INTERRUPT SKIP CHAIN * PART NTRRPT DCA ACSV SAVE HARDWARE REGISTERS -- AC SWP DCA MQSV MQ GTF AND =06177 STRIP OFF UNUSED HARDWARE FLAGS DCA FLSV FLAGS TADI =PCSV GET THE INTERRUPT PC DCA QPCSV TITLE POWER FAIL * KP8E IOS KP8,SPL POWER LOW ? JMP CHAIN NO CDF %PCSV TAD =KCID+(%POWER:UP.LS.3) DCAI =PCSV TAD =POWER:UP DCAI =PCSV+2 AIF NO:EAE,.EAE SCA GET THE STEP COUNTER AIF PDP8I,.PDP8I CLL RAL LEAVE ROOM FOR MODE BIT .PDP8I ANOP DCA SCSV SAVE THE STEP COUNTER AIF PDP8I,.EAE CAM DSI DPSZ WHICH EAE MODE ? HLT MODE A INC SCSV MODE B .EAE ANOP HLT STOP EVERYTHING ! TITLE POWER UP * AIF SYS:DISK.EQ.RK8E,.RK8E AIF SYS:DISK.NE.RK8L,.RL01 .RK8E ANOP 2H IOT DSK,DRST READ DISK READY STATUS AGO .POWER .RL01 AIF SYS:DISK.NE.RL01,.PERTEC NOTE: RL01 DISK NOT SUPPORTED YET MONR ABORT ASSEMBLY AND RETURN TO OS/8 AGO .POWER .PERTEC ANOP 2H LDI 4 AND DSKFUN GET THE L O BIT OF THE DRIVE NUMBER CLL RTR RIGHT JUSTIFY DI DLDC SENSE/CLEAR ATTENTION FLAG CAL DI DRST GET THE DISK STATUS .POWER ANOP POWER:UP QUT %*,2B SZA CLA IS IT UP TO SPEED YET ? JMP 2B NO, WAIT FOR IT AIF DKC8AA.EQ.0,.POWER IOT KP8,CACL CLEAR AC LOW FLAG ON PDP-8/A .POWER ANOP TAD =INTERRUPT RESET INTERRUPT VECTOR DCAX PCSV+2 AIF NO:EAE,.EAE TAD SCSV GET THE STEP COUNTER AND EAE MODE AIF PDP8I,.PDP8I CLL SPA WHICH EAE MODE ? STL MODE B .PDP8I ANOP CMA THIS IS EAE MODE A CODE ROOM 4 DCA 1F LDI SCL LOAD THE STEP COUNTER ERM 1H HLT AIF PDP8I,.PDP8I SZL WHICH EAE MODE ? SWAB MODE B .EAE ANOP TAD DSKJOB NOW CHECK THE DISK BUSY FLAG SNA DISK TRANSFER IN PROGRESS WHEN POWER FAILED ? JMP TIMESHARE NO MQL YES, SAVE THE JOB NUMBER TEMPORARILY DCA DSKJOB CLEAR THE BUSY FLAG TAD =DISK2 INITIALIZE THE DISK CO-ROUTINES DCA DSK:CO MQA GET THE DISK JOB NUMBER .EXDISK YES, DO THE TRANSFER AGAIN TIMESHARE IOT LA8,EIN ENABLE LINE PRINTER AIF V132.EQ.0,.CONT DI LIP INITIATE PRINTING DI LRLC REQUEST LOAD CYCLE DSI LSSD SKIP ON SEND DATA TRUE JMP *-1 LDI 1 DI LPBC .CONT AIF UPCHAR.EQ.0,.CHAR TAD =UPCHAR BRING THE LINE PRINTER ON LINE .CHAR IOT LA8,LS START THE PRINTER CAL IOT TTY1,LS SET TTY #1 FLAG AIF KL8A,.KL8A:TFL IOT TTY2,LS SET TTY #2 FLAG AIF TERMS.EQ.2,.TERMS:TFL IOT TTY3,LS SET TTY #3 FLAG AIF TERMS.EQ.3,.TERMS:TFL IOT TTY4,LS SET ALL TTY FLAGS AIF TERMS.EQ.4,.TERMS:TFL IOT TTY5,LS SET TTY #5 FLAG AIF TERMS.EQ.5,.TERMS:TFL IOT TTY6,LS SET TTY #6 FLAG .TERMS:TFL AGO .TIMESHARE .KL8A:TFL ANOP IOT KL8AX,XMIT SET ALL KL8A OUTPUT FLAGS TAD =0400 IOT KL8AX,XMIT CLL RAL IOT KL8AX,XMIT .TIMESHARE ANOP AIF DK8EP.OR.DKC8AA,.ODD:CLOCK:UP IOT DK8,CLEI TURN ON THE CLOCK AGO .CLOCK:UP .ODD:CLOCK:UP ANOP AIF DK8EP,.PROG:CLOCK:UP LDI 1 IOT DK8,CLLE 'CLLE' MAY NOT CLEAR AC AGO .CLOCK:UP .PROG:CLOCK:UP ANOP CAL AC MAY NOT HAVE BEEN CLEAR TAD =-1000 SET CLOCK COUNTER FOR 1000 COUNTS IOT DK8,CLAB TAD =ENABLE+1000 ENABLE INTERRUPTS, SET MODE & FREQ IOT DK8,CLOE 'CLOE' DOES NOT CLEAR AC .CLOCK:UP ANOP AIF FLOPPY,.FLOPPY CAL AC WAS NOT CLEAR AIF NO:FLOPPY,.NO:FLOPPY .FLOPPY ANOP LDI 1 IOT RX8,INTR TURN ON THE FLOPPY CAL 'INTR' DOES NOT CLEAR AC .NO:FLOPPY ANOP AIF NO:KL8A,.NO:KL8A WHAT POWER UP INITIALIZATION FOR KL8A ? .NO:KL8A ANOP AIF NO:DECTAPE,.DECTAPE * WHAT INITIALIZATION FOR DECTAPE ? .DECTAPE ANOP AIF NO:MAGTAPE,.MAGTAPE DI CLF CLEAR THE CONTROLLER AND MASTER DCA MTJOB AND THROW OUT THE MAGTAPE JOB .MAGTAPE ANOP .TIMESHARE:UP ANOP TITLE INTERRUPT RETURN SEQUENCE * PART RETURN EQU * * AIF NO:TD8E,.TD8E * LDI 1 TAD DTFLAG GET THE TD8E COUNTDOWN FLAG SZA CLA DOES THE TD8E NEED SERVICE ? JMP 1F NO JMS QTD8E YES JMP KP8E CHECK ALL OTHER DEVICES .TD8E ANOP 1H SRQ ANOTHER INTERRUPT PENDING ? JMP 1F NO JMP KP8E YES, START WITH POWER FAIL 1H TAD JOB SNA CLA EXECUTE A JOB ? .SUSPEND NOTHING TO DO, EXECUTE THE NULL JOB AIF NO:EAE.AN.PDP8I,.MQ TAD MQSV RESTORE HARDWARE REGISTERS MQL .MQ ANOP TAD FLSV AIF PDP8I,.I ROOM 7 .I ANOP RTF AIF PDP8I,.I AND =UM SNA CLA DISABLE INTERRUPT SYSTEM ? IOF YES .I ANOP TAD ACSV GET AC ERM JMPI QPCSV RUN CURRENT JOB TITLE INTERRUPT SKIP CHAIN CONTINUATION * CHAIN DC PRKEY CLEAR PRINTER KEYBOARD FLAG IOS DK8,CLSK A CLOCK TICK ? JMP *+2 NO JMS DK8E AIF SYS:DISK.EQ.RK8E,.RK8E AIF SYS:DISK.NE.RK8L,.RL01 .RK8E IOS DSK,SF RK8E DISK COMPLETION ? AGO .DISK .RL01 AIF SYS:DISK.NE.RL01,.PERTEC NOTE: RL01 DISK NOT YET SUPPORTED MONR ABORT ASSEMBLY AND RETURN TO OS/8 .PERTEC ANOP DSI DSAE DISK COMPLETION ? .DISK ANOP JMP *+2 NO JMS QDISK AIF NO:MAGTAPE,.CONT DSI SKJD TM8E TAPE JOB DONE ? JMP *+2 NO JMS TM8E DSI SKEF TM8E TAPE ERROR ? JMP *+2 NO JMS TM8E ISZ MTTRF WAITING FOR TRANSPORT READY FLAG ? JMP *+2 NO JMP TM8ETR YES, NOW IT CAN BE SERVICED DCA MTTRF CLEAR THE TRANSPORT READY FLAG .CONT ANOP AIF NO:FLOPPY,.CONT IOS RX8,SDN RX8E FLOPPY DONE ? JMP *+2 NO JMS RX8E .CONT ANOP AIF NO:PTR,.PTR IOS PR8,SF PAPER TAPE READER ? JMP *+2 NO JMS PR8E .PTR ANOP AIF NO:PTP,.PTP IOS PP8,SF PAPER TAPE PUNCH ? JMP *+2 NO JMS PP8E .PTP AIF V132,.V132 LA8SE IOS LA8,SE IS THE HARDWARE ERROR FLAG SET ? JMP 1F NO INC LEF YES, SET THE SOFTWARE ERROR FLAG IOT LA8,DIN DISABLE LINE PRINTER INTERRUPTS TAD =KNOP REPLACE ERROR FLAG TEST INSTRUCTION DCA LA8SE 1H IOS LA8,SF LINE PRINTER ? JMP *+2 NO JMS LA8E AGO .PRINT * .V132 ANOP LA8SE DSI LSRF IS PRINTER RUN FLAG SET ? LDI 1 NO, SET ERROR FLAG DCA LEF DSI LSPR IS PRINTER READY FLAG SET ? JMP *+2 NO JMS QV132 .PRINT ANOP LDI 1 DCA TTYNUM INITIALIZE TTY NUMBER IOS KEY1,SF TERMINAL # 1 KEYBOARD ? JMP *+2 NO JMS TTYRT IOS TTY1,SF TERMINAL # 2 PRINTER ? JMP *+2 NO JMS TTYRT INC TTYNUM AIF KL8A,.KL8A:CHAIN IOS KEY2,SF TERMINAL # 2 KEYBOARD ? JMP *+2 NO JMS TTYRT IOS TTY2,SF TERMINAL # 2 PRINTER ? JMP *+2 NO JMS TTYRT AIF TERMS.EQ.2,.TERMS:CHAIN INC TTYNUM IOS KEY3,SF TERMINAL # 3 KEYBOARD ? JMP *+2 NO JMS TTYRT IOS TTY3,SF TERMINAL # 3 PRINTER ? JMP *+2 NO JMS TTYRT AIF TERMS.EQ.3,.TERMS:CHAIN INC TTYNUM IOS KEY4,SF TERMINAL # 4 KEYBOARD ? JMP *+2 NO JMS TTYRT IOS TTY4,SF TERMINAL # 4 PRINTER ? JMP *+2 NO JMS TTYRT AIF TERMS.EQ.4,.TERMS:CHAIN INC TTYNUM IOS KEY5,SF TERMINAL # 5 KEYBOARD ? JMP *+2 NO JMS TTYRT IOS TTY5,SF TERMINAL # 5 PRINTER ? JMP *+2 NO JMS TTYRT AIF TERMS.EQ.5,.TERMS:CHAIN INC TTYNUM IOS KEY6,SF TERMINAL # 6 KEYBOARD ? JMP *+2 NO JMS TTYRT IOS TTY6,SF TERMINAL # 6 PRINTER ? JMP RETURN NO JMS TTYRT .TERMS:CHAIN AGO .CHAIN:END .KL8A:CHAIN ANOP WHAT DO I DO ? .CHAIN:END ANOP JMP RETURN CHECK FOR ANOTHER INTERRUPT TITLE HARDWARE SERVICE SUBROUTINES * AIF NO:PTR,.PTR * * PR8-E PAPER TAPE READER * PART PR8E SUB TAD READER GET NEGATED JOB NUMBER SZA IS THE READER ASSIGNED ? JMP 1F YES IOT PR8,RRB NO, CLEAR ITS FLAG CAL THROW THE CHARACTER AWAY CDF %* RET PR8E AND EXIT * 1H CIA .PARAM DWAIT LDI -(READW+1) TEAR DOWN READER WAIT BIT ANDI PNTR1 DCAI PNTR1 NEW JOB WAIT WORD LDI 04000 MAKE AC NON-ZERO IOT PR8,RRB GET THE READER CHARACTER CDF %RB DCAI RBF STORE CHAR IN READER BUFFER LDI 1 UPDATE READER BUFFER FILL POINTER TAD RBF AND =0177 TAD =RB DCA RBF ISZ RCNTR READER BUFFER FULL ? IOT PR8,RFC NO, FETCH ANOTHER CHARACTER RET PR8E * .PTR ANOP * AIF NO:PTP,.PTP * * PP8-E PAPER TAPE PUNCH * PART PP8E SUB CDF %* IOT PP8,CF CLEAR THE PUNCH FLAG DCA PMF AND PUNCH MOTION FLAG TADI PBE GET A CHAR FROM BUFFER SNA PUNCH BUFFER EMPTY ? RET PP8E YES, JUST RETURN IOT PP8,LS NO, PUNCH THE CHARACTER DCA PMF AND SET MOTION FLAG DCAI PBE CLEAR BUFFER POSITION TAD PBE UPDATE BUFFER POINTER IAC AND =0177 TAD =PB DCA PBE LDI -1 BACK UP BUFFER COUNTER TAD PCNTR DCA PCNTR TAD PCNTR GET BUFFER COUNT TAD =128-16 SMA SZA CLA LESS THAN 16 CHAR'S IN BUFFER ? RET PP8E NO, JUST RETURN TAD PUNCH YES, GET NEGATED PUNCH JOB NUMBER CIA .PARAM DWAIT LDI -(PUNW+1) TEAR DOWN PUNCH WAIT BIT ANDI PNTR1 DCAI PNTR1 NEW JOB WAIT WORD CDF %* RET PP8E * .PTP ANOP * * KL8-JA TELETYPE INTERFACES * PART TTYRT SUB TAD TTYNUM GET INTERRUPT TTY NUMBER .PARAM OUTIOT TADI PNTR1 GET OUTPUT IOT FOR THIS TTY TAD =-5 FORM A 'TSF' INSTRUCTION DCA QANY SAVE IT ROOM 3 JMS ANY TERMINAL PRINTER OR KEYBOARD ? ERM JMP TTYREC KEYBOARD INC QANY FORM A 'TCF' INSTRUCTION JMS ANY CLEAR THE TERMINAL PRINTER FLAG INC PNTR1 POINT TO TTY MOTION FLAG DCAI PNTR1 CLEAR THIS TTY MOTION FLAG LDI 2 TAD PNTR1 DCA PNTR2 POINT TO OBE POINTER TADI PNTR2 GET OBE POINTER DCA PNTR3 CDF %BUFFERS TADI PNTR3 LOOK IN THE OUTPUT BUFFER CDF %TABLES SNA ANYTHING TO PRINT ? RET TTYRT NO, FORGET IT INC QANY YES -- INC QANY FORM A 'TLS' INSTRUCTION, 3H JMS ANY PRINT THE CHARACTER DCAI PNTR1 AND SET TTY MOTION FLAG CDF %BUFFERS DCAI PNTR3 CLEAR OUTPUT BUFFER POSITION CDF %TABLES TAD PNTR3 GET OUTPUT BUFFER EMPTY POINTER IAC AND =0177 MQL TAD PNTR3 AND =07600 MQA DCAI PNTR2 SAVE UPDATED POINTER INC PNTR2 POINT TO OUTPUT BUFFER CHAR COUNTER LDI -1 TADI PNTR2 BACK UP CHARACTER COUNTER DCAI PNTR2 TADI PNTR2 TAD =128-16 SMA SZA CLA BUFFER .LE. 16 CHARACTERS ? RET TTYRT NO TAD =DWAIT-MF TAD PNTR1 DCA PNTR1 POINT TO DEVICE WAIT WORD TAD =-(TTYW+1) CLEAR TTY WAIT BIT ANDI PNTR1 DCAI PNTR1 NEW JOB DEVICE WAIT WORD RET TTYRT * * KEYBOARD HANDLER FOR ALL TTY'S * PART TTYREC LDI -3 TAD QANY FORM A 'KRB' INSTRUCTION DCA QANY JMS ANY READ THE KEYBOARD CHARACTER MQL MQA AND =0177 STRIP PARITY BIT TAD =-CTRLC SNA IS IT A CONTROL/C ? JMP NCTRLC YES TAD =CTRLC-CTRLH SNA IS IT A CONTROL/H ? JMP NCTRLH YES, A LOG-ON CHARACTER TAD =CTRLH-CTRLS SNA IS IT A CONTROL/S ? JMP NCTRLQS YES IAC IAC SNA IT IS A CONTROL/Q ? JMP NCTRLQS YES IAC SNA IS IT A CONTROL/P ? JMP NCTRLP YES IAC SNA CLA IS IT A CONTROL/O ? JMP NCTRLO YES TTYREC2 TAD =IBF-OUTIOT NO, JUST A NORMAL CHARACTER TTYREC4 TAD PNTR1 DCA PNTR1 POINTING TO IBF POINTER TTYREC3 TADI PNTR1 DCA PNTR2 POINTING INTO INPUT BUFFER CDF %BUFFERS TADI PNTR2 CHECK THE INPUT BUFFER SZA CLA IS IT FULL ? RET TTYRT YES, IGNORE THE CURRENT CHARACTER LDI 04000 NO, ENSURE THAT CHARACTER IS NON-ZERO MQA DCAI PNTR2 STORE CHARACTER IN JOB INPUT BUFFER CDF %TABLES LDI 1 UPDATE IBF TAD PNTR2 AND =037 MQL TAD PNTR2 AND =07740 MQA DCAI PNTR1 NEW IBF POINTER TAD =DWAIT-IBF TAD PNTR1 DCA PNTR1 POINT TO JOB DEVICE WAIT WORD TAD =-(KEYW+1) CLEAR KEYBOARD WAIT BIT ANDI PNTR1 DCAI PNTR1 NEW JOB DEVICE WAIT WORD RET TTYRT * * CONTROL/C HANDLER * PART NCTRLC TAD =LWAIT-OUTIOT TAD PNTR1 DCA PNTR1 LDI HALTW ANDI PNTR1 SZA CLA IS THE JOB HALTED ? RET TTYRT YES, FORGET IT MQA GET THE CHARACTER DCA TEMP SAVE IT TEMPORARILY TAD =IBF-LWAIT TAD PNTR1 DCA PNTR2 TADI PNTR2 GET THE IBF POINTER AND =07740 MQL LDI -1 BACK UP THE BUFFER POINTER TADI PNTR2 AND =037 MQA DCA PNTR3 CDF %BUFFERS LDI -CTRLC TADI PNTR3 AND =0177 SNA CLA WAS LAST CHARACTER ALSO A CONTROL/C ? JMP NCTRLH YES, TREAT AS A LOG-ON JMS CLEAR:ALL NO, JUST A NORMAL CONTROL/C CDF %TABLES TAD PNTR2 RESET PNTR1 TO IBF DCA PNTR1 TAD TEMP GET THE CONTROL/C MQL JMP TTYREC3 STORE IT IN THE INPUT BUFFER * * CONTROL/H (LOG ON) HANDLER * PART NCTRLH JMS CLEAR:ALL CLEAR ALL I/O BUFFERS ASSIGNED THIS JOB CDF %* RELEASE ALL MEMORY ASSIGNED THIS JOB, IF ANY TAD TTYNUM CIA DCA TEMP TAD =FIELD2 DCA FPNTR TAD =-6 DCA CNTR 1H TADI FPNTR LOOK FOR FIELDS ASSIGNED THIS JOB AND =07 KEEP ONLY JOB BITS TAD TEMP SNA CLA IS THIS FIELD ASSIGNED THIS JOB ? DCAI FPNTR YES, RELEASE IT INC FPNTR BUMP THE POINTER ISZ CNTR CHECKED ALL FIELD INFO WORDS ? JMP 1B NO TAD TTYNUM .PARAM DWAIT DCAI PNTR1 CLEAR ALL DEVICE WAIT BITS INC PNTR1 POINT TO LOGIC WAIT WORD LDI NRESW SET NON-RESIDENT WAIT BIT DCAI PNTR1 NEW JOB WAIT WORD TAD =04400+(%OS8RES.LS.3) FUNCTION WORD DCA QFUNC TAD =OS8RES MEMORY ADDRESS DCA QADDR TAD TTYNUM FIND THE JOB STARTING SWAP BLOCK .FINDB DCA QBLOCK TAD TTYNUM .EXDISK WRITE THE OS/8 START BLOCK CDF %TABLES TAD TTYNUM GET THE INTERRUPT JOB NUMBER CIA TAD JOB SZA CLA IS IT THE CURRENT JOB ? JMP 2F NO DCA JOB YES, CLEAR THE CURRENT JOB DCAI =UJOB ALSO CLEAR THE USER JOB 2H TAD PNTR1 DCA AXR2 LDI UM SET USER MODE DCAI AXR2 SET RELATIVE 'IF' AND 'DF' = 0 DCAI AXR2 CLEAR USER PC RET TTYRT * * CONTROL/O HANDLER * NCTRLO JMP NCTRLC JUST LIKE CONTROL/C EXCEPT CONTROL/O * IS RETURNED TO USER * * CONTROL/P HANDLER * PART NCTRLP TAD TTYNUM GET THE INTERRUPT TTY NUMBER .PARAM LWAIT TADI PNTR1 GET THE WAIT WORD AND =ISUSPW SNA CLA IS THE JOB INDEFINITELY SUSPENDED ? JMP 1F NO, TREAT AS A NORMAL CHARACTER LDI NRESW SET NON-RESIDENT LOGIC WAIT BIT DCAI PNTR1 RET TTYRT * 1H TAD =IBF-LWAIT JMP TTYREC4 JUST TREAT AS A NORMAL CHARACTER * * CONTROL/Q AND CONTROL/S HANDLER * NCTRLQS MQA GET THE CHARACTER DCA TEMP SAVE IT TEMPORARILY TAD =IBF-OUTIOT TAD PNTR1 DCA PNTR1 TADI PNTR1 GET THE INPUT BUFFER FILL POINTER AND =07740 SET IT TO THE BUFFER BEGINNING DCAI PNTR1 TAD =-32 SET THE BUFFER CHARACTER COUNT MQL LDI -1 TADI PNTR1 .CLEAR CLEAR THE JOB INPUT BUFFER CDF %TABLES TAD PNTR1 ALSO RESET THE INPUT BUFFER EMPTY POINTER DCA AXR2 TADI PNTR1 DCAI AXR2 TAD TEMP GET THE CONTROL CHARACTER MQL JMP TTYREC3 STORE IT IN THE INPUT BUFFER * * CLEAR ALL I/O BUFFERS ASSIGNED TO THIS JOB * PART CLEAR:ALL SUB TAD =-32 SET UP TO CLEAR INPUT BUFFER MQL TAD TTYNUM .PARAM DWAIT LDI DISKW ANDI PNTR1 RETAIN ONLY THE DISK WAIT BIT, IF SET DCAI PNTR1 TAD PNTR1 NOW POINT TO IBF TAD =IBF-DWAIT DCA PNTR1 TADI PNTR1 AND =07740 TAD =-1 BACK UP FOR INDEX .CLEAR CLEAR IT CDF %TABLES TADI PNTR1 MAKE IBE = IBF INC PNTR1 DCAI PNTR1 INC PNTR1 POINT TO OUTPUT IOT INC PNTR1 POINT TO MF DCAI PNTR1 CLEAR IT INC PNTR1 POINT TO OBF TAD =-128 SET UP TO CLEAR OUTPUT BUFFER MQL TADI PNTR1 AND =07600 TAD =-1 .CLEAR CLEAR IT CDF %TABLES TADI PNTR1 MAKE OBE = OBF INC PNTR1 DCAI PNTR1 INC PNTR1 POINT TO OBC MQA (MQ) = -128 DCAI PNTR1 TAD TTYNUM TAD PRINTER SZA CLA PRINTER ASSIGNED TO THIS JOB ? JMP 1F NO DCA PRINTER RELEASE PRINTER FROM THIS JOB TAD =LPB-1 (MQ) = -128 .CLEAR CLEAR PRINTER BUFFER TAD =LPB SET PRINTER BUFFER POINTERS DCA LBE TAD LBE DCAX LBF MQA (MQ) = -128 DCA LCNTR AIF NO:PTR,.PTR 1H TAD TTYNUM TAD READER SZA CLA READER ASSIGNED TO THIS JOB ? JMP 1F NO DCA READER RELEASE READER FROM THIS JOB TAD =RB-1 (MQ) = -128 .CLEAR CLEAR READER BUFFER TAD =RB SET READER BUFFER POINTERS DCA RBF TAD RBF DCAX RBE MQA (MQ) = -128 DCA RCNTR .PTR AIF NO:PTP,.PTP 1H TAD TTYNUM TAD PUNCH SZA CLA PUNCH ASSIGNED TO THIS JOB ? JMP 1F NO DCA PUNCH RELEASE PUNCH FROM THIS JOB TAD =PB-1 (MQ) = -128 .CLEAR CLEAR PUNCH BUFFER TAD =PB SET PUNCH BUFFER POINTERS DCA PBE TAD PBE DCAX PBF MQA (MQ) = -128 DCA PCNTR .PTP AIF NO:DECTAPE,.DECTAPE 1H TAD TTYNUM CIA TAD DTJOB SZA CLA IS THIS ALSO THE DECTAPE JOB ? RET CLEAR:ALL NO CDF %* DCA DTJOB CLEAR DECTAPE JOB BUSY FLAG AIF TD8E,.TD8E HLT STOP TC08 DECTAPE AGO .DECTAPE .TD8E DCA DTFLAG CLEAR DECTAPE COUNTDOWN FLAG DCA D6A CLEAR TD8E INITIALIZATION LOCATIONS DCA D4A TAD =TD8E2 RESET TD8E CO-ROUTINE DCA TD:CO LDI 6 AND DTFUNC EXTRACT TD8E CHASSIS NUMBER CLL RTL CIA TAD =SDRC FORM AN 'SDRC' INSTRUCTION DCA 2F PUT IT IN THE CODING LINE TAD 2F DCA 3F LDI SDLC-SDRC TAD 2F DCA 4F 2H HLT READ THE TD8E COMMAND REGISTER AND =01000 SNA CLA IS TAPE IN MOTION ? RET CLEAR:ALL NO 3H HLT READ THE TD8E COMMAND REGISTER AND =06000 REMOVE 'GO' AND 'WRITE' BITS 4H HLT STOP THE TAPE RET CLEAR:ALL .DECTAPE ANOP 1H RET CLEAR:ALL TITLE REAL TIME CLOCK HARDWARE SUBROUTINE * PART DK8E SUB CDF %* TAD LEF GET THE LINE PRINTER SOFTWARE ERROR FLAG SNA CLA DID AN ERROR PREVIOUSLY EXIST ? JMP 1F NO AIF V132,.V132 IOS LA8,SE DOES IT STILL EXIST ? JMP *+2 NO, IT IS NOW CLEARED JMP 1F YES TAD =06663 REPLACE THE SKIP CHAIN INST DCA LA8SE IOT LA8,EIN RE-ENABLE LINE PRINTER INTERRUPTS DCA LEF AND CLEAR SOFTWARE ERROR FLAG TAD LMF GET PRINTER MOTION FLAG SZA CLA WAS THE PRINTER IN MOTION ? IOT LA8,LS YES, RE-START IT AGO .PRINT .V132 DSI LSRF IS THE RUN FLAG NOW SET ? JMP 1F NO DCA LEF YES, CLEAR SOFTWARE ERROR FLAG JMS V132 AND START PRINTER .PRINT ANOP 1H JMS DKSERV UPDATE THE TIME AND DATE AIF NO:TD8E,.TD8E TAD DTFLAG CHECK THE TD8E COUNTDOWN FLAG ROOM 4 SZA CLA DOES A COUNTDOWN EXIST ? ISZ DTFLAG YES, BUMP THE COUNT JMP 2F NO OVERFLOW JMS QTD8E SERVICE THE TD8E .TD8E ANOP 2H TAD JOB GET THE JOB NUMBER SNA CLA IS IT THE NULL JOB ? .SUSPEND YES, RUN THE SCHEDULER ISZ JTIME HAS TIME QUANTUM EXPIRED ? RET DK8E NO LDI 1 Set extended time quantum bit. MQL ... TADI =ULOCK YES, CHECK ON USER IOT LOCK ? SNA CLA SIMULATING IOT'S ? .SUSPEND NO, SUSPEND THE JOB DCA JTIME YES, SET THE TIME QUANTUM UP FLAG RET DK8E * * CLOCK SERVICE SUBROUTINE * PART DKSERV SUB UPDATE THE TIME AND DATE AIF DKC8AA.EQ.0,.CONT IOT DK8,CLCL Clear the DKC8AA clock flag .CONT AIF DK8EP.EQ.0,.CONT IOT DK8,CLSA CLEAR THE PROGRAMMABLE CLOCK FLAG .CONT CAL THROW THE OVERFLOW BIT (BIT 0) AWAY ISZ TIME+1 BUMP LOW ORDER TIME JMP DK:OK NO OVERFLOW ISZ TIME BUMP HIGH ORDER TIME JMP DK:OK IT ISN'T MIDNIGHT * 2H TAD =MMIDNHO IT IS NOW MIDNIGHT -- RESET THE TIME DCA TIME 3H TAD =MMIDNLO DCA TIME+1 TAD OSDATEL GET THE L O DATE WORD DCA TEMP SAVE IT TEMPORARILY MIDNITE TAD =1.LS.3 BUMP THE DAY TAD OSDATEL MQL MQA DCA OSDATEL MQA AND =037.LS.3 EXTRACT THE DAY SNA A VALID DAY ? JMP MIDNITE NO, BUMP AGAIN DCA PNTR2 PERHAPS -- SAVE IT MQA AND =017.LS.8 EXTRACT THE MONTH RAR6 CLL RTR DCA PNTR3 STORE MONTH TEMPORARILY TAD PNTR3 GET THE MONTH TAD =DAYTAB DCA PNTR1 POINT TO ITS TABLE ENTRY CDF %DAYTAB TADI PNTR1 CDF %* TAD PNTR2 SPA SNA CLA A VALID DAY ? JMP 2F YES MQA AND =07407 MASK OFF DAY TAD =(1.LS.8)+(1.LS.3) BUMP THE MONTH AND SET DAY TO 1 DCA OSDATEL INC PNTR3 BUMP THE MONTH 2H TAD PNTR3 GET THE MONTH TAD =-12 SPA SNA CLA A VALID MONTH ? JMP DK:OK YES TAD OSDATEL GET THE DATE BACK AGAIN AND =07 SAVE YEAR IAC BUMP YEAR MQL MQA AND =07 LOOK AT L O YEAR BITS SZA CLA WAS A H O BIT PRODUCED ? JMP 3F NO MQL CDF %OSDATEH TAD =1.LS.7 BUMP H O YEAR BITS TADI =OSDATEH DCAI =OSDATEH TADI =OSDATEH AND =0670 EXTRACT YEAR AND MEMORY SIZE BITS DCAI =CORINFO SET CORE INFO WORD IN TIMESHARE OS/8 3H CDF %* MQA GET THE YEAR TAD =(1.LS.8)+(1.LS.3) SET MONTH AND DAY TO 1 DCA PNTR2 TAD PNTR2 DCA OSDATEL STORE THE NEW DATE DK:OK LDI -JOBS CHECK ALL JOB REAL TIME WAITS DCA CNTR TAD =JOB1+LWAIT DCA PNTR1 CDF %TABLES 1H TADI PNTR1 LOOK AT THE LOGIC WAIT WORD AND =REALW SNA CLA IS THE REAL TIME WAIT BIT SET ? JMP 2F NO TAD =RESTART-LWAIT TAD PNTR1 DCA PNTR2 ISZI PNTR2 TIME TO RESTART ? JMP 2F NO INC PNTR2 PERHAPS ISZI PNTR2 TIME TO RESTART ? JMP 2F NO TADI PNTR1 YES, GET THE WAIT WORD AND =-(REALW+1) REMOVE THE REAL TIME WAIT BIT DCAI PNTR1 2H TAD PNTR1 SET POINTER TO NEXT TERMINAL WAIT WORD TAD =USER:ST DCA PNTR1 ISZ CNTR CHECKED ALL TERMINALS YET ? JMP 1B NO RET DKSERV AIF V132,.V132 * * LA8-E LINE PRINTER * PART LA8E SUB CDF %* LA8E2 IOT LA8,CF CLEAR PRINTER FLAG DCA LMF CLEAR PRINTER MOTION FLAG IOS LA8,SE ERROR FLAG SET ? JMP 1F NO LDI 1 YES, SET SOFTWARE ERROR FLAG DCA LEF RET LA8E AND EXIT * 1H TADI LBE GET A CHARACTER FROM BUFFER SNA BUFFER EMPTY ? JMP LA8E3 YES, FORGET IT IOT LA8,LS No, print it LDI 1 and set motion flag DCA LMF DCAI LBE CLEAR BUFFER POSITION LDI 1 UPDATE PRINTER BUFFER EMPTY POINTER TAD LBE AND =0177 TAD =LPB DCA LBE LDI -1 BACK UP BUFFER COUNTER TAD LCNTR DCA LCNTR IOS LA8,SF IS PRINTER FLAG UP AGAIN ? JMP 2F NO JMP LA8E2 YES, OUTPUT NEXT CHARACTER 2H TAD LCNTR GET BUFFER COUNT TAD =128-16 SMA SZA CLA LESS THAN 16 CHARACTERS ? RET LA8E NO LA8E3 TAD PRINTER GET PRINTER JOB NUMBER SNA IS THE PRINTER ASSIGNED ? RET LA8E NO CIA .PARAM DWAIT LDI -(LPTW+1) REMOVE LPT WAIT BIT ANDI PNTR1 DCAI PNTR1 NEW JOB LOGIC WAIT WORD RET LA8E * AGO .PRINT .V132 ANOP * * DATA PRINTER V132 LINE PRINTER * PART QV132 SUB CDF %* DI LCPF CLEAR PRINTER FLAG DSI LSRF IS THE RUN FLAG SET ? RET QV132 NO QV:CO SUB QVX USE CO-ROUTINES RET QV132 * QVX TAD LMF GET THE PRINTER MOTION FLAG SNA IS IT A CONTROL CHARACTER ? JMP 2F NO TAD =-04101 YES SZA CLA A FORM FEED ? JMP 1F NO, A LINE FEED LDI 03777 AND LMF GET FORM FEED CONTROL CODE DI LPBC LOAD PRINTER BUFFER LDI 1 SET MOTION FLAG FOR LINE FEED DCA LMF 1H DI LIP LINE FEED DI LRLC REQUEST LOAD CYCLE ROOM 2 JMS QV:CO WAIT FOR PRINTER FLAG LDI 1 DI LPBC LOAD PRINTER BUFFER DCA LMF CLEAR PRINTER MOTION FLAG 2H TADI LBE GET A CHAR FROM PRINTER OUTPUT BUFFER SNA IS THE BUFFER EMPTY ? JMP 4F YES MQL STORE IT TEMPORARILY DCAI LBE CLEAR THE BUFFER POSITION LDI 1 UPDATE PRINTER OUTPUT BUFFER TAD LBE AND =0177 TAD =LPB DCA LBE LDI -1 RESET BUFFER CHARACTER COUNTER TAD LCNTR DCA LCNTR MQA GET THE CHARACTER SMA IS IT A CONTROL CHARACTER ? JMP 3F NO DI LIP YES, INITIATE PRINTING DCA LMF DI LRLC REQUEST LOAD CYCLE ROOM 2 JMS QV:CO JMP QVX * 3H DI LPBC LOAD PRINTER BUFFER JMP 2B GET NEXT CHARACTER * 4H TAD PRINTER RESTART JOB SNA A VALID JOB NUMBER ? RET QV132 NO CIA .PARAM DWAIT LDI -(LPTW+1) ANDI PNTR1 REMOVE LINE PRINTER WAIT DCAI PNTR1 RET QV132 * .PRINT ANOP * AIF NO:MAGTAPE,.NO:MAGTAPE * * TM8-E MAGTAPE * PART TM8UN DI CLT CLEAR THE CONTROLLER AND EXIT TM8E SUB TAD MTJOB GET THE MAGTAPE JOB NUMBER SNA CLA IS THE MAGTAPE ASSIGNED ? JMP TM8UN NO, IT'S UNASSIGNED CDF %* DI RCMR READ THE HARDWARE COMMAND REGISTER AND =070 EXTRACT ONLY THE FIELD SNA WAS THIS A READ/COMPARE/WRITE ? JMP 0F NO CLL RAR YES, COMPUTE ITS FIELD INFO WORD ADDRESS RTR TAD =FIELD0 DCA FPNTR TADI FPNTR AND =-(LOCK+1) REMOVE THE 'LOCK' BIT DCAI FPNTR 0H TAD MTJOB GET THE MAGTAPE JOB NUMBER .PARAM MTWC-1 FIRST, SAVE THE STATUS REGISTERS TAD PNTR1 USE INDEX DCA AXR2 DI RWCR GET THE HARDWARE WORD COUNT DCAI AXR2 DI RCAR GET THE HARDWARE CURRENT ADDRESS DCAI AXR2 DI RMSR GET THE HARDWARE MAIN STATUS DCAI AXR2 DI RFSR GET THE HARDWARE FUNCTION AND 2ND STATUS DCAI AXR2 TAD =DWAIT-MTFN TAD AXR2 DCA PNTR1 POINT TO WAIT WORD LDI -(MTAW+1) ANDI PNTR1 TEAR DOWN THE MAGTAPE WAIT BIT DCAI PNTR1 CDF %* DCA MTJOB CLEAR THE BUSY FLAG DI CLT CLEAR THE CONTROLLER TADI MTQE CHECK THE MAGTAPE QUEUE SNA ANYTHING ON THE QUEUE ? RET TM8E NO DCA MTJOB YES, SET THE BUSY FLAG LDI 1 UPDATE THE MAGTAPE QUEUE EMPTY POINTER TAD MTQE AND =3 TAD =MTQB DCA MTQE TM8ETR TAD MTJOB .PARAM AC TADI PNTR1 GET THE MAGTAPE JOB'S FUNCTION/GO WORD AND =07000 EXTRACT THE FUNCTION CLL RTL ROTATE TO BITS 9 - 11 RTL TAD =-4 SNA IS IT A WRITE FUNC ? JMP 1F YES IAC SNA IS IT A READ/COMPARE FUNC ? JMP 1F YES IAC SZA CLA IS IT A READ FUNC ? JMP 2F NO 1H TAD =MTCM-AC TAD PNTR1 DCA PNTR2 POINT TO MAGTAPE COMMAND TAD =077 SET FIELD SEARCH MASK MQL TADI PNTR2 GET THE MAGTAPE COMMAND AND =070 EXTRACT DESIRED TRANSFER FIELD TAD MTJOB GET THE MAGTAPE JOB NUMBER .FINDF SNA IS IT RESIDENT ? JMP TM8E2 NO DCA FPNTR YES, SAVE ITS FIELD INFO WORD ADDRESS TADI FPNTR GET THE FIELD INFO WORD AND =-(LOCK+1) REMOVE THE 'LOCK' BIT, IF SET TAD =LOCK NOW SET THE 'LOCK' DCAI FPNTR TAD FPNTR NOW COMPUTE PHYSICAL FIELD TAD =-FIELD0 CLL RAL RTL 2H MQL DSI SKTR IS THE CONTROLLER READY ? LDI -1 NO, SET TRANSPORT NOT READY FLAG DCA MTTRF DSI SKTR IS THE CONTROLLER READY ? RET TM8E JUST WAIT FOR ANY INTERRUPT CDF %TABLES TADI PNTR2 GET THE COMMAND WORD AGAIN INC PNTR2 POINT TO WORD COUNT AND =07407 STRIP OFF PARITY AND INTERRUPT ENABLES TAD =0300 ENABLE INTERRUPT ON ERROR OR JOB DONE MQA BRING UP THE HARDWARE FIELD DI LCMR LOAD THE COMMAND REGISTER TADI PNTR2 GET THE WORD COUNT INC PNTR2 POINT TO CURRENT ADDRESS DI LWCR LOAD THE WORD COUNT REGISTER TADI PNTR2 GET THE CURRENT ADDRESS DI LCAR LOAD IT TADI PNTR1 GET THE FUNCTION/GO WORD DI LFGR START THE TRANSPORT JMP TM8E3 CLEAR USER AC AND EXIT * TM8E2 CDF %TABLES LDI DWAIT-AC TAD PNTR1 DCA PNTR1 POINT TO WAIT WORD LDI -(MTAW+1) ANDI PNTR1 REMOVE MT WAIT BIT DCAI PNTR1 INC PNTR1 BUMP TO JOB PC INC PNTR1 LDI -1 NOW BACK UP USER PC FOR ANOTHER TRY TADI PNTR1 TM8E3 DCAI PNTR1 RET TM8E * .NO:MAGTAPE ANOP * AIF SYS:DISK.EQ.RK8E,.RK8E AIF SYS:DISK.NE.RK8L,.RL01 .RK8E ANOP * * RK8-E DISK SYSTEM * * THE FORMAT ON THE DISK QUEUE IS: * JOB NUMBER * FUNCTION WORD * BIT(S) PURPOSE * 0 0=READ; 1=WRITE * 1-5 PAGES IN TRANSFER * 6-8 MEMORY FIELD * 9-10 DISK DRIVE * 11 HIGH ORDER DISK ADDRESS * CORE ADDRESS * DISK BLOCK NUMBER * -- ENTERING -- -- EXITING -- * (INT) OFF OFF * (DF) ANYTHING 0 * (L) ANYTHING UNDEFINED * (AC) 0000 0000 * (MQ) ANYTHING UNCHANGED * PART QDISK SUB CDF %* IOT DSK,DRST GET DISK STATUS CLL RAL SZA CLA IS ALL WELL ? JMP DISKERR NO IOT DSK,CF YES, CLEAR INTERRUPT DSK:CO SUB DISK2 CO-ROUTINE ENTRY RET QDISK * DISK2 DCA DSKJOB CLEAR THE DISK BUSY FLAG TADI DQE LOOK AT THE DISK QUEUE SMA SZA CLA IS THE QUEUE EMPTY ? JMP 1F NO ROOM 2 JMS DSK:CO RETURN JMP DISK2 * 1H TADI DQE GET THE CURRENT DISK JOB NUMBER AGAIN DCA DSKJOB AND SET THE DISK BUSY FLAG TAD DSKJOB COMPUTE ITS WAIT WORD ADDRESS MULT64 TAD =JOB1-USER:ST+DWAIT DCA DSKPNTR LDI 04000 TAD DSKJOB DCAI DQE SET THE 'ENTRY REMOVED' FLAG INC DQE BUMP THE POINTER LDI DISKW SET THE DISK WAIT BIT JMS DISK9 TADI DQE GET FUNCTION WORD INC DQE DCA DSKFUN TADI DQE GET CORE ADDR INC DQE DCA DSKCOR TADI DQE GET DISK ADDR DCA DSKBLK LDI 1 UPDATE QUEUE BUFFER EMPTY POINTER TAD DQE AND =077 TAD =DQB DCA DQE LDI -3 SET THE ERROR COUNT DCA DSKERR DISK5 TAD DSKCOR GET CORE ADDR IOT DSK,DLCA LOAD CURRENT ADDR TAD DSKBLK GET DISK ADDR DCA BLOCKS TAD DSKFUN GET FUNCTION WORD AND =03700 PAGES TO TRANSFER SNA 40(8) PAGES ? LDI 04000 YES DCA PAGES TAD DSKFUN GET FUNCTION WORD AND =04077 R/W + FIELD + DRIVE + H.O. TAD =0400 SET INTERRUPT BIT DCA DSKCMD PARTIAL DISK COMMAND CLL DISK6 TAD PAGES AND =07600 SNA CLA HALF BLOCK ? TAD =01000 YES RAR 'ALL' BIT IN LINK RTR TAD DSKCMD GET REST OF COMMAND IOT DSK,DLDC LOAD DISK COMMAND TAD BLOCKS GET BLOCK NUMBER IOT DSK,DLAG LOAD DISK ADDR AND WAIT ROOM 2 JMS DSK:CO FOR COMPLETION FLAG TAD PAGES SNA TRANSFER COMPLETE ? JMP DISK2 YES TAD =-0200 SUBTRACT ONE PAGE SPA SNA FINISHED TRANSFER ? JMP DISK8 YES DCA PAGES KEEP PAGE COUNT TAD BLOCKS CLL CMA AND =037 SZA CLA NEXT BLOCK ON NEW CYLINDER ? STL YES, SET LINK AS 'ALL' FLAG ISZ BLOCKS BUMP BLOCK COUNTER JMP DISK6 SET UP NEXT TRANSFER INC DSKCMD IN CASE BLOCKS = 7777(8) JMP DISK6 SET UP NEXT TRANSFER * PART DISK8 CAL ALL TRANSFERS COMPLETE DCA PAGES JMS DSKQCHK CHECK FOR MORE OF THIS JOB'S ENTRIES JMP DISK2 CHECK FOR MORE ON QUEUE * * CHECK THE DISK QUEUE FOR ADDITIONAL ENTRIES * FOR THE DISK REQUEST JUST COMPLETED * PART DSKQCHK SUB TAD DQF CHECK FOR MORE OF THIS JOB'S ENTRIES ON QUEUE CLL CIA TAD DQE SNA ANY PENDING DISK QUEUE ENTRIES ? JMP 2F NO SZL IS FILL POINTER GREATER THAN EMPTY POINTER ? TAD =-0100 NO, FAKE IT STL IAC RTR COUNT THE ENTRIES DCA DSKCOR TAD DQE GET THE CURRENT QUEUE EMPTY POINTER DCA BLOCKS TAD DSKJOB CIA DCA DSKJOB 1H TADI BLOCKS GET AN ENTRY TAD DSKJOB COMPARE WITH CURRENT DISK JOB SNA CLA IS IT THE SAME JOB ? RET DSKQCHK YES, DON'T REMOVE DISK WAIT BIT LDI 4 BUMP POINTER TO NEXT ENTRY TAD BLOCKS AND =077 TAD =DQB DCA BLOCKS ISZ DSKCOR CHECKED ALL REMAINING DISK QUEUE ENTRIES ? JMP 1B NO 2H JMS DISK9 YES, MAKE THE JOB RUNNABLE RET DSKQCHK * * SUBROUTINE TO SET/CLEAR DISK WAIT BIT * PART DISK9 SUB MAKE JOB RUNNABLE TAD =KNOP WILL BE EITHER 'NOP' OR 'IAC' DCA 1F LDI -(DISKW+1) CDF %TABLES ANDI DSKPNTR CLEAR THE DISK WAIT BIT 1H HLT RESET OR LEAVE IT CLEARED DCAI DSKPNTR CDF %* RET DISK9 * * DISK ERROR ROUTINE * PART DISKERR IOT DSK,CF TRY TO CLEAR DISK LDI 2 IOT DSK,CF RE-CALIBRATE DISK TAD =-25 DCA DSKCMD USED AS A COUNTER DCA PAGES USED AS A COUNTER ROOM 17 1H ISZ PAGES JMP 2F ISZ DSKCMD TIMEOUT ? JMP 2F NO JMP 4F YES * 2H IOS DK8,CLSK DID THE CLOCK TICK ? JMP 3F NO JMS DKSERV YES, SERVICE IT 3H IOS DSK,SF DID THE DISK FLAG SET ? ERM JMP 1B NO 4H ISZ DSKERR 3 ERRORS YET ? JMP DISKTRY NO IOT DSK,DLDC YES, CLEAR DISK COMMAND REGISTER IOT DSK,CF CLEAR THE DISK FLAG LDI 6 AND DSKFUN EXTRACT THE RK05 DRIVE NUMBER SZA CLA IS IT THE SWAPPING DISK ? JMP 5F NO LDI 1 AND DSKFUN GET THE H O SECTOR BIT SZA CLA IS IT A SWAPPING SECTOR ? JMP 5F NO TAD BLOCKS POSSIBLY--GET THE BLOCK NUMBER TAD =-SWAP SNL IS IT A SWAPPING SECTOR ? JMP 5F NO TAD =-JOBS*128 SZL CLA IS IT A SWAPPING SECTOR ? JMP 6F YES 5H CAL AC MAY NOT BE CLEAR DCA PAGES NO, BUT WE TRIED & FAILED ! JMS DSKQCHK CHECK THE DISK QUEUE LDI 3 POINT TO JOB PC TAD DSKPNTR DCA DSKPNTR CDF %TABLES LDI -1 BACK UP JOB PC TO ERROR RETURN TADI DSKPNTR DCAI DSKPNTR CDF %* JMP DISK2 CHECK FOR ANOTHER QUEUE ENTRY * 6H LDI 1 THERE IS A BAD SECTOR ON THE SWAPPING DISK AND DSKFUN GET THE H O BIT RAR ROTATE IT TO THE LINK TAD =KHLT SET UP FOR POSSIBLE POWER FAILURE CDF %PCSV DCAI =PCSV TAD BLOCKS GET THE BAD BLOCK NUMBER HLT AND HALT JMPX OS8DEST RETURN TO STANDALONE OS/8 * DISKTRY IOS DSK,SF DID THE DISK FLAG SET ? JMP DISKERR NO IOT DSK,CF YES, CLEAR IT IOT DSK,DRST GET THE DISK STATUS CLL RAL SNA CLA DID IT RE-CALIBRATE OK ? JMP DISK5 YES, TRY THE TRANSFER AGAIN JMP DISKERR NO, TRY TO RE-CALIBRATE AGAIN * AGO .END:DISKS * .RL01 AIF SYS:DISK.NE.RL01,.PERTEC * NOTE: RL01 DISK NOT YET SUPPORTED MONR ABORT ASSEMBLY AND RETURN TO OS/8 * .PERTEC AIF SYS:DISK.NE.PERTEC,.END:DISKS * * PERTEC DISK SYSTEM * * THE FORMAT ON THE DISK QUEUE IS: * JOB NUMBER * FUNCTION WORD * BIT(S) PURPOSE * 0 0=READ; 1=WRITE * 1-5 PAGES IN TRANSFER * 6-8 MEMORY FIELD * 9-10 DISK DRIVE * 11 HIGH ORDER DISK ADDRESS * CORE ADDRESS * DISK BLOCK NUMBER * -- ENTERING -- -- EXITING -- * (INT) OFF OFF * (DF) ANYTHING 0 * (L) ANYTHING UNDEFINED * (AC) 0000 0000 * (MQ) ANYTHING UNDEFINED * PART QDISK SUB CDF %* DI DLDC SENSE STATUS DI DRST GET DISK STATUS DSK:CO SUB DISK2 CO-ROUTINE ENTRY RET QDISK * DISK2 SZA CLA IS THE DISK STATUS OK ? JMP DISKERR NO DCA DSKJOB YES, CLEAR THE DISK BUSY FLAG TADI DQE LOOK AT THE DISK QUEUE SMA SZA CLA IS THE QUEUE EMPTY ? JMP 1F NO ROOM 2 JMS DSK:CO RETURN JMP DISK2 * 1H TADI DQE GET THE CURRENT JOB NUMBER AGAIN DCA DSKJOB AND SET THE DISK BUSY FLAG TAD DSKJOB COMPUTE ITS WAIT WORD ADDRESS MULT64 TAD =JOB1-USER:ST+DWAIT DCA DSKPNTR LDI 04000 TAD DSKJOB DCAI DQE SET THE 'ENTRY REMOVED' FLAG INC DQE BUMP THE POINTER LDI DISKW SET THE DISK WAIT BIT JMS DISK9 TADI DQE GET FUNCTION WORD INC DQE DCA DSKFUN TADI DQE GET CORE ADDR INC DQE DCA DSKCOR TADI DQE GET DISK ADDR DCA DSKBLK LDI 1 UPDATE QUEUE BUFFER EMPTY POINTER TAD DQE AND =077 TAD =DQB DCA DQE LDI -3 SET THE ERROR COUNT DCA DSKERR DISK4 LDI -1 TAD DSKCOR GET CORE ADDR -1 CDF %DSKCA DCAI =DSKCA SET THE MEMORY ADDRESS TAD DSKFUN GET THE FUNCTION WORD AND =03700 EXTRACT THE PAGE COUNT CLL RAL CIA DCAI =DSKWC STORE THE WORD COUNT LDI 1 AND DSKFUN GET THE H O DISK ADDRESS BIT RAR ROTATE TO LINK TAD DSKBLK GET THE OS/8 BLOCK NUMBER AND =07740 EXTRACT THE L O CYLINDER BITS RAR RIGHT JUSTIFY CYLINDER BITS RTR RTR DCA DSKCYL SAVE CYLINDER ADDRESS LDI 2 AND DSKFUN GET L O BIT OF DRIVE NUMBER RTL ROTATE TO POSITION RTL DCA BLOCKS STORE IT TEMPORARILY TAD DSKBLK GET THE OS/8 BLOCK NUMBER AND =037 EXTRACT THE SURFACE/SECTOR ADDRESS TAD BLOCKS ADD THE H O HEAD BIT DCA BLOCKS SAVE THE HEAD/SECTOR ADDRESS TAD BLOCKS 1H DI DLHS LOAD THE HEAD/SECTOR ADDRESS CAL TAD DSKCYL GET THE CYLINDER ADDRESS DLCY LOAD IT CAL TAD =01400 FORM A 'POSITION ACCESS' COMMAND DI DLDC LOAD DISK COMMAND REGISTER LDI 04000 TAD DSKFUN GET THE FUNCTION WORD AND =070 R/W BIT TO LINK, FIELD IN AC 6-8 SNL A READ OR WRITE ? TAD =0400 READ TAD =0400 WRITE DI DLDC LOAD THE DISK COMMAND REGISTER CAL ROOM 2 JMS DSK:CO AND WAIT FOR COMPLETION SNA ANY ERRORS ? JMP DISK5 NO AND =07737 REMOVE END-OF-CYLINDER ERROR BIT SZA CLA ANY OTHER ERRORS ? JMP DISKERR YES CDF %DSKWC TADI =DSKWC GET THE WORD COUNT SNA CLA DID THE TRANSFER COMPLETE ? JMP DISK5 YES, THE TRANSFER WAS OK INC DSKCYL NO, BUMP THE CYLINDER NUMBER TAD BLOCKS GET THE HEAD/SECTOR ADDRESS AND =040 EXTRACT THE H O HEAD BIT JMP 1B * PART DISK5 CAL ALL TRANSFERS COMPLETE DCA PAGES JMS DSKQCHK CHECK FOR MORE OF THIS JOB'S DISK REQUESTS JMP DISK2 CHECK FOR MORE ON QUEUE * * CHECK THE DISK QUEUE FOR ADDITIONAL ENTRIES * FOR THE DISK REQUEST JUST COMPLETED * PART DSKQCHK SUB TAD DQF CHECK FOR MORE OF THIS JOB'S ENTRIES ON QUEUE CLL CIA TAD DQE SNA ANY PENDING DISK QUEUE ENTRIES ? JMP 2F NO SZL IS FILL POINTER GREATER THAN EMPTY POINTER ? TAD =-0100 NO, FAKE IT STL IAC RTR COUNT THE ENTRIES DCA DSKCOR TAD DQE GET THE CURRENT QUEUE EMPTY POINTER DCA BLOCKS TAD DSKJOB CIA DCA DSKJOB 1H TADI BLOCKS GET AN ENTRY TAD DSKJOB COMPARE WITH CURRENT DISK JOB SNA CLA IS IT THE SAME JOB ? RET DSKQCHK YES, DON'T REMOVE DISK WAIT BIT LDI 4 BUMP POINTER TO NEXT ENTRY TAD BLOCKS AND =077 TAD =DQB DCA BLOCKS ISZ DSKCOR CHECKED ALL REMAINING DISK QUEUE ENTRIES ? JMP 1B NO 2H JMS DISK9 YES, MAKE THE JOB RUNNABLE RET DSKQCHK * * SUBROUTINE TO SET/CLEAR DISK WAIT BIT * PART DISK9 SUB MAKE JOB RUNNABLE TAD =KNOP WILL BE EITHER 'NOP' OR 'IAC' DCA 1F LDI -(DISKW+1) CDF %TABLES ANDI DSKPNTR CLEAR THE DISK WAIT BIT 1H HLT RESET OR LEAVE IT CLEARED DCAI DSKPNTR CDF %* RET DISK9 * * DISK ERROR ROUTINE * PART DISKERR ISZ DSKERR 3 ERRORS YET ? JMP DISK4 NO, TRY THE TRANSFER AGAIN LDI 4 AND DSKFUN EXTRACT THE H O DRIVE NUMBER L O BIT SNA CLA IS IT THE SWAPPING DISK ? JMP 5F YES, GIVE UP ! DCA PAGES NO, BUT WE TRIED & FAILED ! JMS DSKQCHK CHECK THE DISK QUEUE LDI 3 POINT TO JOB PC TAD DSKPNTR DCA DSKPNTR CDF %TABLES LDI -1 BACK UP JOB PC TO ERROR RETURN TADI DSKPNTR DCAI DSKPNTR CDF %* JMP DISK2 CHECK FOR ANOTHER QUEUE ENTRY * 5H LDI 1 THERE IS A BAD SECTOR ON THE SWAPPING DISK AND DSKFUN GET THE H O BIT RAR ROTATE IT TO THE LINK TAD =KHLT SET UP FOR POSSIBLE POWER FAILURE CDF %PCSV DCAI =PCSV TAD BLOCKS GET THE BAD BLOCK NUMBER HLT AND HALT JMPX OS8DEST RETURN TO STANDALONE OS/8 * .END:DISKS ANOP * AIF NO:FLOPPY,.FLOPPY * * RX8-E FLOPPY DISK SYSTEM * PART RX8E SUB CDF %* RX:CO SUB RX82 CO-ROUTINES FOR EFFICIENT FLOPPY OPERATIONS RET RX8E YES, SERVICE THEM * RX82 CDF %* SAFETY TADI RXQE LOOK IN THE FLOPPY QUEUE BUFFER SZA ANYTHING THERE ? JMP 1F YES DCA RXJOB NO, CLEAR BUSY FLAG AND EXIT JMS RX:CO JMP RX82 * 1H DCA RXJOB SAVE THE JOB NUMBER DCAI RXQE REMOVE THE ENTRY INC RXQE BUMP THE BUFFER POINTER TADI RXQE GET THE FUNCTION WORD INC RXQE DCA RXFUNC TADI RXQE GET THE MEMORY ADDRESS INC RXQE DCA RXADDR TADI RXQE GET THE RX LOGICAL BLOCK NUMBER DCA RXLOGB RX8E LOGICAL BLOCK LDI 1 UPDATE THE FLOPPY BUFFER EMPTY POINTER TAD RXQE AND =017 TAD =RXQB DCA RXQE LDI -3 SET THE ERROR RETRY COUNT DCA RXERR LDI 04000 TAD RXFUNC READ/WRITE BIT TO LINK CLA CML RTL COMPLEMENT OF R/W BIT TO BIT 10 DCA RXMDRW LDI 3 AND RXFUNC EXTRACT THE MODE AND DRIVE NUMBER RTR SPA CLA WHICH DRIVE ? TAD =020 DRIVE 1 SZL WHICH MODE ? TAD =0100 8-BIT TAD RXMDRW ADD IN R/W BIT DCA RXMDRW SET THE MODE-DRIVE-READ/WRITE WORD TAD =077 MASK FOR .FINDF MQL TAD RXFUNC GET THE FUNCTION WORD AND =070 EXTRACT THE USER RELATIVE FIELD TAD RXJOB ADD THE JOB NUMBER .FINDF SZA IS THE FIELD RESIDENT ? JMP 3F YES 2H .FINDM SZA ANY MEMORY AVAILABLE ? JMP 3F YES JMS RXWAIT WASTE SOME TIME JMP 2B KEEP WAITING FOR MEMORY * 3H DCA RXFPNTR SAVE FIELD INFO WORD POINTER TAD RXFPNTR COMPUTE THE PHYSICAL FIELD TAD =-FIELD0 CLL RAL RTL TAD =KCDF DCA RXCDF+1 SET THE 'RXCDF' SUBROUTINE TADI RXFPNTR GET THE FIELD INFO WORD SZA IS THE TRANSFER FIELD RESIDENT ? JMP 5F YES TAD RXFUNC GET THE RX FUNCTION WORD AND =070 EXTRACT THE RELATIVE FIELD TAD RXJOB ADD THE JOB NUMBER TAD =LOCK ADD THE LOCK-IN-MEMORY BIT DCAI RXFPNTR SET THE FIELD INFO WORD TAD RXFPNTR GET THE FIELD INFO WORD ADDRESS DCA FPNTR .SWAPF READ IN THE TRANSFER FIELD 4H JMS RXWAIT WASTE SOME TIME WHILE WAITING TAD RXJOB GET THE FLOPPY JOB NUMBER .PARAM DWAIT LDI DISKW ANDI PNTR1 GET THE SWAP DISK WAIT BIT SZA CLA IS THE FIELD LOADED YET ? JMP 4B NO, WASTE SOME MORE TIME CDF %* JMP 6F * 5H TAD =LOCK SET THE FIELD LOCK-IN-CORE BIT DCAI RXFPNTR 6H TAD RXJOB POINT TO THE JOB'S WAIT WORD MULT64 TAD =JOB1-USER:ST DCA RXTEM LDI 2 YES, GET THE MODE AND RXFUNC SZA CLA WHICH MODE ? TAD =-64 8-BIT TAD =-64 DCA RXCONST RXMAIN LDI -1 GET THE TRANSFER MEMORY ADDRESS -1 TAD RXADDR FOR INDEX USE DCA AXR6 TAD RXLOGB GET THE LOGICAL BLOCK NUMBER DCA RXBLOCK STORE IT IN WORKING LOCATION LDI 2 AND RXFUNC GET THE MODE RTR MODE BIT TO LINK TAD RXFUNC GET THE FUNCTION WORD AND =03700 EXTRACT THE PAGE BITS SNL WHICH MODE ? RAL 12-BIT -- FORM A WORD COUNT SNA A FULL FIELD TRANSFER ? RAR YES (FOR 8 BIT MODE: THIS IS DOUBLE WORD COUNT) CIA DCA RXWC STORE THE WORD COUNT TAD RXFUNC GET THE FUNCTION WORD SPA CLA READ OR WRITE ? JMP RXWR WRITE PART RXRD JMS RXST LOAD SECTOR/TRACK AND WAIT FOR DONE FLAG TAD RXCONST SET THE SECTOR UNLOADING COUNTER DCA RXCNTR TAD RXMDRW GET THE COMMAND WORD IOT RX8,LCD LOAD FLOPPY COMMAND REGISTER JMS RXCDF CDF TO TRANSFER FIELD LDI 2 CHECK THE MODE AND RXFUNC SZA CLA 8- OR 12-BIT MODE ? JMP RXRD8 8-BIT MODE 1H IOS RX8,STR TRANSFER READY FLAG UP ? JMP 1B NOT YET -- WAIT FOR IT IOT RX8,XDR YES, TRANSFER THE DATUM DCAI AXR6 PUT IN USER CORE ISZ RXWC FINISHED THE ENTIRE TRANSFER ? NOP ISZ RXCNTR FINISHED TRANSFERRING A FLOPPY SECTOR ? JMP 1B NO, GET NEXT DATUM ROOM 2 JMS RX:CO WAIT FOR DONE FLAG (PROCESS OTHER INTERRUPTS) TAD RXWC LOOK AT TOTAL WORD COUNT SZA CLA FINISHED ENTIRE TRANSFER ? JMP RXRD NO, SET UP TO GET NEXT FLOPPY SECTOR JMP RXRET YES * PART RXRD8 JMS RXCDF CDF TO TRANSFER FIELD 1H JMS RXFER GET A BYTE DCA RXTEM STORE IT TEMPORARILY JMS RXFER GET NEXT BYTE DCA RXTEM2 STORE IT TEMPORARILY JMS RXFER GET THIRD BYTE RTL SHIFT 4 LEFT RTL MQL MQA AND =07400 H O 4 BITS ONLY TAD RXTEM ADD L O 8 BITS DCAI AXR6 FIRST WORD NOW COMPLETE MQA RTL RTL AND =07400 H O 4 BITS ONLY TAD RXTEM2 ADD L O 8 BITS DCAI AXR6 SECOND WORD NOW COMPLETE ISZ RXWC ENTIRE TRANSFER FINISHED ? JMP 1B NO TAD RXCNTR YES, CHECK THE FLOPPY BYTE COUNTER SNA CLA SECTOR END ? JMP RXRET YES, EXIT 2H IOS RX8,STR FLUSH OUT THE REMAINDER OF SECTOR JMP 2B IOT RX8,XDR ISZ RXCNTR FINISHED ? JMP 2B NO CAL YES, CLEAR THE AC ROOM 2 JMS RX:CO WAIT FOR THE DONE FLAG JMP RXRET AND EXIT * * WASTE TIME WHILE WAITING FOR A DISK TRANSFER * PART RXWAIT SUB LDI 07775 NO, GET MODE, DRIVE AND R/W WORD AND RXMDRW MASK OUT R/W BIT TAD =5.LS.1 JUST EXECUTE A READ STATUS COMMAND IOT RX8,LCD (TAKES ABOUT 250 MILLISECONDS) ROOM 2 JMS RX:CO RET RXWAIT * * THIS SUBROUTINE READS BYTES FROM THE FLOPPY SECTOR BUFFER * PART RXFER SUB 1H IOS RX8,STR IS THE TRANSFER READY FLAG UP ? JMP 1B NO, WAIT FOR IT IOT RX8,XDR READ THE BYTE IN AC(4-11) ISZ RXCNTR IS THIS THE SECTOR END ? RET RXFER NO DCA RXTEM3 YES, SAVE THE BYTE ROOM 2 JMS RX:CO WAIT FOR DONE FLAG (PROCESS OTHER INTERRUPTS) JMS RXST SET NEXT TRACK AND SECTOR ADDRESS JMS RXCDF 'DF' TO USER BUFFER FIELD TAD RXCONST RESET THE SECTOR WORD/BYTE COUNTER DCA RXCNTR TAD RXFUNC SMA CLA READ OR WRITE SECTOR ? JMP 2F READ TAD RXWC CHECK WORD COUNT IAC SNA CLA NEXT TO LAST WORD ? JMP 3F YES 2H TAD RXMDRW GET FLOPPY COMMAND WORD IOT RX8,LCD 'EMPTY BUFFER' OR 'WRITE SECTOR' 3H TAD RXTEM3 GET THE LAST BYTE READ RET RXFER * PART RXWR TAD RXMDRW GET THE COMMAND WORD IOT RX8,LCD LOAD THE FLOPPY COMMAND REGISTER TAD RXCONST GET THE WORD/BYTE COUNT DCA RXCNTR JMS RXCDF CDF TO TRANSFER FIELD LDI 0100 CHECK THE MODE AND RXMDRW SZA CLA WHICH MODE ? JMP RXWR8 8-BIT 1H TADI AXR6 GET A 12-BIT DATUM 2H IOS RX8,STR TRANSFER READY FLAG UP ? JMP 2B NOT YET -- WAIT FOR IT IOT RX8,XDR YES, TRANSFER THE DATUM CAL ISZ RXWC FINISHED ENTIRE TRANSFER ? NOP ISZ RXCNTR FINISHED FILLING SECTOR BUFFER ? JMP 1B NO, GET ANOTHER DATUM ROOM 2 JMS RX:CO WAIT FOR DONE FLAG (PROCESS OTHER INTERRUPTS) JMS RXST LOAD SECTOR AND TRACK AND WRITE SECTOR TAD RXWC GET THE WORD COUNT SZA CLA FINISHED ENTIRE TRANSFER ? JMP RXWR NO, CONTINUE JMP RXRET YES * PART RXWR8 TADI AXR6 GET A 12-BIT DATUM JMS RXFER TRANSFER L O 8 BITS TO SECTOR BUFFER AND =07400 EXTRACT 4 H O BITS DCA RXTEM2 SAVE THEM TADI AXR6 GET SECOND 12-BIT DATUM JMS RXFER TRANSFER L O 8 BITS TO SECTOR BUFFER AND =07400 EXTRACT 4 H O BITS CLL RTR AND ROTATE RIGHT 4 BITS RTR TAD RXTEM2 GET H O 4 BITS OF FIRST WORD CLL RTR ROTATE COMBINATION RIGHT 4 BITS RTR JMS RXFER TRANSFER TO SECTOR BUFFER CAL ISZ RXWC END OF TRANSFER ? JMP RXWR8 NO, CONTINUE TAD RXCNTR YES TAD =128 SNA CLA DID SECTOR BUFFER EXACTLY FILL? JMP 2F YES 1H IOS RX8,STR NO, FILL OUT REMAINDER WITH ZEROES JMP 1B IOT RX8,XDR ISZ RXCNTR FINISHED ? JMP 1B NO ROOM 2 JMS RX:CO WAIT FOR DONE FLAG JMS RXST LOAD SECTOR AND TRACK AND WRITE SECTOR 2H TAD =0130 IOT RX8,LCD THIS IS A FAKE COMMAND TO GET DONE FLAG RXRET CDF %* TADI RXFPNTR GET THE FIELD INFO WORD AND =-(LOCK+1) REMOVE LOCK-IN-MEMORY FLAG DCAI RXFPNTR TAD RXJOB POINT TO THE JOB WAIT WORD .PARAM DWAIT LDI -(FLOPW+1) TEAR DOWN FLOPPY WAIT BIT ANDI PNTR1 DCAI PNTR1 NEW JOB DEVICE WAIT WORD JMP RX82 CHECK ON NEXT QUEUE ENTRY * PART RXST SUB CALCULATE SECTOR AND TRACK, LDI 4 TAD RXMDRW FORM 'READ' OR 'WRITE' SECTOR BUFFER IOT RX8,LCD LOAD THEM INTO FLOPPY AND WAIT FOR DONE FLAG DCA RXTRACK CLEAR TRACK NUMBER LDI 0100 CHECK THE MODE AND RXMDRW SZA CLA 8- OR 12-BIT MODE ? JMP RXST8 8-BIT MODE STL CALCULATE THE TRACK NUMBER WITH SECTOR AS TAD RXBLOCK RESIDUE RXCALT SZL INC RXTRACK TAD =-13 SMA JMP RXCALT CML RAL TAD =27 SECTOR ADDRESS NOW IN AC JMP RXST8E TRANSFER SECTOR & TRACK TO FLOPPY * * DIVIDE CONSTANTS USED BELOW * DIVT DC -26*64,-26*32,-26*16,-26*8,-26*4,-26*2,-26,0 * RXST8 CLL TAD RXBLOCK GET THE LOGICAL BLOCK NUMBER DCA RXTBLK TAD =DIVT-1 DCA AXR7 CDF %* RXST8L DCA RXTRACK CLEAR OR UPDATE TRACK NUMBER TADI AXR7 GET A DIVIDE CONSTANT SNA END OF TABLE ? JMP 1F YES TAD RXTBLK SZL DCA RXTBLK UPDATE RESULT CLA TAD RXTRACK RAL JMP RXST8L KEEP LOOPING 1H TAD RXTBLK GET THE RESIDUE MQL DCA RXTBLK CLEAR THE TEMP LOCATION MQA 2H TAD =-13 NOW COMPUTE SECTOR WITHIN THE TRACK INC RXTBLK SMA FINISHED ? JMP 2B NO TAD =13 YES, RESTORE RESULT CLL RAL DOUBLE IT (SECTOR INTERLACE FACTOR = 2) TAD RXTBLK RXST8E IOS RX8,STR TRANSFER READY FLAG UP ? JMP RXST8E NO, WAIT FOR IT IOT RX8,XDR TRANSFER THE SECTOR NUMBER CAL 'XDR' DOES NOT CLEAR AC TAD RXTRACK GET COMPUTED TRACK NUMBER 3H IOS RX8,STR TRANSFER READY FLAG UP ? JMP 3B NO, WAIT FOR IT IOT RX8,XDR TRANSFER THE TRACK NUMBER CAL INC RXBLOCK BUMP LOGICAL BLOCK NUMBER ROOM 2 JMS RX:CO RETURN AND WAIT FOR DONE FLAG IOS RX8,SER ANY ERRORS ? RET RXST NO * * FLOPPY ERROR ROUTINE * PART RXERROR ISZ RXERR 3 ERRORS YET ? JMP 1F NO, TRY AGAIN TAD RXJOB YES, GET THE JOB NUMBER .PARAM PC LDI -1 MAKE JOB PC POINT TO ERROR RETURN TADI PNTR1 DCAI PNTR1 INC PNTR1 POINT TO JOB AC LDI 04000 AC ERROR VALUE DCAI PNTR1 JMP RXRET MAKE JOB RUNNABLE * 1H LDI 1 RE-INITIALIZE THE FLOPPY IOT RX8,INTR CLA 'INTR' DOES NOT CLEAR THE AC JMS RX:CO WAIT FOR THE INTERRUPT JMP RXMAIN AND TRY THE TRANSFER AGAIN * .FLOPPY ANOP * AIF NO:DECTAPE,.DECTAPE * AIF TD8E,.TD8E * QTC08 CLA HLT * AGO .DECTAPE * .TD8E ANOP * * TD8E DECTAPE * PART QTD8E SUB CDF %* NEXT 2 INSTRUCTIONS REMOVE TIME DELAY ERROR D6A NOP SDRC -- READ THE TD8E COMMAND REGISTER D4A NOP SDLC -- LOAD THE TD8E COMMAND REGISTER TD:CO SUB TD8E2 CO-ROUTINES MAKE IT EASY TAD DTCLOCK GET THE CLOCK TICK COUNTER SNA ANY TICKS DURING TD8E SERVICING ? RET QTD8E NO CIA YES, NEGATE DCA DTCLOCK ROOM 6 1H JMS DKSERV SERVICE THE CLOCK ISZ DTCLOCK FINISHED ? JMP 1B NO RET QTD8E * TD8E2 CDF %* LOOK IN THE DECTAPE QUEUE BUFFER TADI DTQE SZA ANYTHING THERE ? JMP 1F YES DCA DTJOB NO, CLEAR THE BUSY FLAG DCA DTFLAG AND TD8E COUNTDOWN FLAG ROOM 2 JMS TD:CO AND EXIT JMP TD8E2 * 1H DCA DTJOB SAVE THE JOB NUMBER DCAI DTQE REMOVE THE ENTRY FROM THE QUEUE INC DTQE BUMP THE POINTER TADI DTQE GET THE FUNCTION WORD INC DTQE DCA DTFUNC LDI -1 GET THE MEMORY ADDRESS -1 TADI DTQE FOR INDEXING INC DTQE DCA DTADDR TADI DTQE GET THE DECTAPE LOGICAL BLOCK NUMBER DCA DTBLOCK LDI 1 UPDATE THE DECTAPE QUEUE EMPTY POINTER TAD DTQE AND =017 TAD =DTQB DCA DTQE LDI -3 SET THE ERROR RETRY COUNT DCA DTERR LDI 6 AND DTFUNC GET THE TD8E DECTAPE PAIR NUMBER CLL RTL CIA TAD =SDSS FORM THE 'SDSS' INSTRUCTION DCA DTTEMP STORE TEMPORARILY TAD =DTIOT-1 SET UP THE PROPER IOT'S FOR THIS TRANSPORT DCA AXR TAD =-7 DCA DTCNTR 2H TADI AXR GET A TABLE ADDRESS DCA AXR1 3H TADI AXR1 GET AN ADDRESS SNA END OF TABLE ? JMP 4F YES DCA DTPNTR NO, SAVE IT TAD DTTEMP GET THE IOT DCAI DTPNTR STORE IT JMP 3B GET NEXT ADDRESS * 4H INC DTTEMP BUMP TO GET THE NEXT TD8E DECTAPE IOT ISZ DTCNTR STORED ALL IOT'S ? JMP 2B NO TAD =077 MASK FOR .FINDF MQL TAD DTFUNC GET THE FUNCTION WORD AND =070 EXTRACT THE USER RELATIVE FIELD TAD DTJOB ADD THE JOB NUMBER .FINDF SZA IS THE FIELD RESIDENT ? JMP TD8E3 YES 5H .FINDM NO SZA ANY MEMORY AVAILABLE ? JMP TD8E3 YES JMS DTWAIT WAIT 100 MILLISECONDS JMP 5B CHECK FOR MEMORY AVAILABILITY * PART TD8E3 DCA DTFPNTR SAVE THE FIELD INFO WORD POINTER TAD DTFPNTR COMPUTE THE PHYSICAL FIELD TAD =-FIELD0 CLL RAL RTL TAD =KCDF DCA DTCDF+1 STORE IT IN A SPECIAL SUBROUTINE TADI DTFPNTR GET THE FIELD INFO WORD SZA IS THE TRANSFER FIELD RESIDENT ? JMP 2F YES, DON'T SWAP IT INTO MEMORY TAD DTFUNC GET THE FUNCTION WORD AND =070 EXTRACT USER RELATIVE TRANSFER FIELD TAD DTJOB ADD THE JOB NUMBER TAD =LOCK ADD THE LOCK-IN-MEMORY BIT DCAI DTFPNTR SET THE FIELD INFO WORD TAD DTFPNTR GET THE FIELD INFO WORD ADDRESS DCA FPNTR .SWAPF READ IN THE TRANSFER FIELD 1H JMS DTWAIT WAIT 100 MILLISECONDS TAD DTJOB GET THE DECTAPE JOB NUMBER .PARAM DWAIT LDI 1 ANDI PNTR1 GET THE SWAP DISK WAIT BIT SZA CLA IS THE FIELD LOADED YET ? JMP 1B NO, WASTE ANOTHER 100 MILLISECONDS CDF %* JMP 3F 2H TAD =LOCK ADD THE LOCK-IN-MEMORY BIT DCAI DTFPNTR 3H DCA DTSUM CLEAR THE DECTAPE CHECKSUM TAD DTFUNC GET THE FUNCTION WORD AND =03700 EXTRACT THE PAGE COUNT SNA A FULL FIELD TRANSFER ? LDI 04000 YES RAR6 ROTATE TO L O BITS CIA DCA DTPGCT SAVE THE PAGE COUNT LDI 1 AND DTFUNC GET THE TD8E UNIT RTR ROTATE TO BIT 0 D4B DI KHLT SDLC -- LOAD THE TD8E COMMAND REGISTER D6B DI KHLT SDRC -- READ THE TD8E COMMAND REGISTER AND =0100 SZA CLA A SELECT ERROR ? JMP DTTRYS YES TAD DTFUNC GET THE FUNCTION WORD AND =07 EXTRACT THE TRANSPORT NUMBER TAD =DTBTAB ADD DECTAPE BLOCK NUMBER TABLE ADDRESS DCA DTPNTR POINT TO THIS TRANSPORT'S CURRENT BLOCK CDF %DTBTAB TADI DTPNTR GET THE CURRENT BLOCK NUMBER CDF %* TAD =10 ADD 10 TO IT CLL CIA TAD DTBLOCK SET LINK IF DESIRED BLOCK IS 10 OR MORE JMP DTGO AHEAD TO START TAPE FORWARD DTTRYS LDI -1 FAKE OUT ERROR COUNTER DCA DTERR * PART DTTRY3 CAL COME HERE ON DECTAPE ERROR ISZ DTERR TRIED 3 TIMES YET ? JMP 1F NO JMP DTRET 1H TAD DTADDR BACK UP DECTAPE CURRENT ADDRESS TAD =-0200 DCA DTADDR CAL CLEAR LINK FOR REVERSE TAPE MOTION JMP DTGO AND TRY AGAIN * DTERROR EQU * ROOM 4 D2A DSI KHLT SDST -- TIME ERROR ? SZA CLA WRITE LOCK OR CHECKSUM ERROR ? ERM JMP DTTRY3 YES D6C HLT SDRC -- READ THE TD8E COMMAND REGISTER AND =07000 TURN OFF WRITE HEAD (IF IT WERE ON) D4C HLT SDLC -- LOAD THE TD8E COMMAND REGISTER INC DTBLOCK BUMP THE DECTAPE LOGICAL BLOCK NUMBER LDI -1 SET THE TD8E SERVICE FLAG DCA DTFLAG ROOM 2 JMS TD:CO SERVICE OTHER INTERRUPTS ISZ DTPGCT ALL PAGES TRANSFERRED ? JMP DTGOF NO DTRET LDI 1 AND DTFUNC GET THE TD8E UNIT NUMBER RTR ROTATE TO BIT 0 D4D DI KHLT SDLC -- STOP THE TAPE PART DTFIN TADI DTFPNTR GET THE FIELD INFO WORD AND =-(LOCK+1) REMOVE LOCK-IN-CORE FLAG DCAI DTFPNTR RELEASE THE PHYSICAL MEMORY FIELD FROM TD8E TAD DTJOB .PARAM DWAIT LDI -(DTAW+1) TEAR DOWN THE DECTAPE WAIT BIT ANDI PNTR1 DCAI PNTR1 TAD DTFUNC GET THE FUNCTION WORD AND =07 EXTRACT THE TRANSPORT NUMBER TAD =DTBTAB POINT INTO TRANSPORT CURRENT BLOCK TABLE DCA DTPNTR TAD DTBLOCK STORE THE CURRENT BLOCK DCAI DTPNTR TAD DTERR SZA CLA DID AN ERROR OCCUR ? JMP 1F NO LDI 3 YES, MOVE POINTER TO USER PC TAD PNTR1 DCA PNTR1 LDI -1 BACK UP USER PC TADI PNTR1 DCAI PNTR1 INC PNTR1 BUMP POINTER TO USER AC LDI 04000 DCAI PNTR1 SET ERROR RETURN AC 1H CDF %* DCA D6A RESET TD8E ENTRY INITIALIZATION DCA D4A JMP TD8E2 CHECK FOR ANOTHER QUEUE ENTRY * DTGOF TAD DTBLOCK GET THE NEXT BLOCK NUMBER TAD =-737*2 SMA CLA IS IT A LEGAL DECTAPE BLOCK NUMBER ? JMP DTTRYS NO, TAKE ERROR EXIT LDI -3 RESET ERROR FLAG DCA DTERR (ALSO SETS LINK FOR FORWARD TAPE MOTION) DTGO CLA CML IAC REVERSE DIRECTION BIT (IN LINK); SET AC = 1 AND DTFUNC ADD THE TD8E UNIT BIT RTR MOVE EVERYTHING TO ITS PROPER PLACE TAD =01000 ADD 'GO' BIT D4E DI KHLT SDLC -- LOAD THE TD8E COMMAND REGISTER TAD =-10 SET H O TIMEOUT DCA DTCNTR ALLOW FOR SLOW STARTING DECTAPES 1H ISZ DTTEMP TIMEOUT ? JMP 2F NO ISZ DTCNTR TIMEOUT ? JMP 2F NO JMP DTTRYS YES, AN ERROR 2H IOS DK8,CLSK DID THE CLOCK TICK ? JMP D1A NO AIF DK8EP.EQ.0,.CONT IOT DK8,CLSA CLEAR CLOCK FLAG CLA .CONT INC DTCLOCK COUNT THE CLOCK TICKS D1A DSI KHLT SDSS -- SINGLE LINE FLAG SET ? JMP 1B NO DTPSRCH JMS DTR4 YES, WAIT FOR 8 LINES TO PASS JMS DTR4 PART ROOM 9 DTSRCH IOS DK8,CLSK DID THE CLOCK TICK ? JMP D1B NO AIF DK8EP.EQ.0,.CONT IOT DK8,CLSA CLEAR THE CLOCK FLAG CLA .CONT INC DTCLOCK COUNT THE CLOCK TICKS D1B DSI KHLT SDSS -- SINGLE LINE FLAG SET ? ERM JMP DTSRCH NO, WAIT FOR IT D6D DI KHLT SDRC -- READ TD8E COMMAND REGISTER RTL DIRECTION BIT TO LINK AND =077.LS.2 EXTRACT MARK TRACK CODE TAD =-(022.LS.2) SNA END ZONE ? JMP DTENDZ YES TAD =-(4.LS.2) SZA CLA BLOCK MARK ? JMP DTSRCH NO, KEEP SEARCHING D7A DI KHLT SDRD -- GET THE BLOCK NUMBER SZL IS TAPE MOVING IN REVERSE ? TAD =4 YES, LOOK FOR 4 BEFORE ACTUAL TARGET BLOCK DCA DTCURB SAVE IT TAD DTCURB CMA TAD DTBLOCK CMA SNA IS THIS THE BLOCK ? JMP DTFOUND YES SZL CLA IS TAPE HEADING IN RIGHT DIRECTION ? JMP 1F YES DTENDZ EQU * D6E DI KHLT SDRC -- READ THE TD8E COMMAND REGISTER RTL DIRECTION BIT TO LINK JMP DTGO REVERSE TAPE DIRECTION * 1H TAD DTCURB GET THE CURRENT TD8E DECTAPE BLOCK NUMBER CMA TAD DTBLOCK SNA WITHIN 2 DECTAPE BLOCKS ? JMP DTSRCH YES, DON'T LEAVE UNTIL TRANSFER IS COMPLETE AIF DK8EC.EQ.0,.CONT CLL RAR DIVIDE THE DIFFERENCE BY 2 .CONT SMA CMA DCA DTFLAG SET THE TD8E COUNTDOWN FLAG ROOM 2 JMS TD:CO SERVICE OTHER INTERRUPTS JMP DTPSRCH CONTINUE SEARCHING * PART DTFOUND SZL CLA IS TAPE MOVING IN RIGHT DIRECTION ? JMP DTGO NO, REVERSE AND TRY AGAIN ROOM 9 1H IOS DK8,CLSK DID THE CLOCK TICK ? JMP D1C NO AIF DK8EP.EQ.0,.CONT IOT DK8,CLSA CLEAR THE CLOCK FLAG CLA .CONT INC DTCLOCK D1C DSI KHLT SDSS -- SINGLE LINE FLAG SET ? ERM JMP 1B NO, WAIT FOR IT D6F DI KHLT SDRC -- READ THE TD8E COMMAND REGISTER AND =077 EXTRACT MARK TRACK CODE TAD =-032 SZA CLA FOUND REVERSE GUARD YET ? JMP D1C NO, KEEP LOOKING TAD =-128 YES, SET WORD COUNTER DCA DTWDCT TAD DTFUNC GET THE FUNCTION WORD SMA CLA READ OR WRITE REQUEST ? JMP DTREAD READ PART DTWRITE EQU * D6G DI KHLT SDRC -- READ THE TD8E COMMAND REGISTER AND =0200 EXTRACT WRITE LOCK BIT SZA CLA IS THE TRANSPORT WRITE LOCKED ? JMP DTTRYS YES JMS DTR4 SKIP ONE DECTAPE 12-BIT WORD LDI 1 AND DTFUNC GET THE TD8E UNIT NUMBER RTR UNIT NUMBER TO BIT 0 TAD =01400 SET COMMAND FOR FORWARD, GO AND WRITE D4F DI KHLT SDLC -- LOAD THE TD8E COMMAND REGISTER LDI 07777 JMS DTW4 7777 IN REVERSE CHECKSUM LDI 07777 AND ALSO TAPE CHECKSUM DCA DTSUM JMS DTCDF 'DF' TO TRANSFER FIELD DTWL TADI DTADDR GET A 12-BIT DATUM JMS DTW4 WRITE IT TO TAPE ISZ DTWDCT FINISHED WRITING A DECTAPE BLOCK ? JMP DTWL NO JMS DTW4 A 129TH WORD OF ZERO JMS DTGCHK GET 6-BIT CHECKSUM JMS DTW4 WRITE IT TO TAPE JMS DTW4 LET CHECKSUM FINISH JMP DTERROR CHECK FOR ERRORS AND CONTINUE * PART DTREAD JMS DTR4 SKIP TWO 6-BIT CONTROL WORDS JMS DTR4 JMS DTR4 AND =077 EXTRACT THE CHECKSUM TAD =07700 DCA DTSUM JMS DTCDF 'DF' TO TRANSFER FIELD DTRL JMS DTR4 GET A 12-BIT DATUM FROM TAPE JMS DTCKSM ADD INTO CHECKSUM DCAI DTADDR STORE IN USER BUFFER ISZ DTWDCT FINISHED READING THIS DECTAPE BLOCK ? JMP DTRL NO JMS DTR4 129TH WORD JMS DTCKSM ADD INTO CHECKSUM JMS DTR4 AND =07700 JMS DTCKSM JMS DTGCHK COMPARE TAPE AND CALCULATED CHECKSUMS JMP DTERROR CHECK FOR ERRORS AND CONTINUE * * TD8E DECTAPE SUBROUTINES * * READ 4 DECTAPE LINES * PART DTR4 SUB ROOM 9 1H IOS DK8,CLSK DID THE CLOCK TICK ? JMP D3A NO AIF DK8EP.EQ.0,.CONT IOT DK8,CLSA CLEAR THE CLOCK FLAG CLA .CONT INC DTCLOCK COUNT THE CLOCK TICKS D3A DSI KHLT SDSQ -- QUAD LINE FLAG SET ? ERM JMP 1B NO, WAIT FOR IT D7B DI KHLT SDRD -- READ THE TD8E DATA REGISTER RET DTR4 * * WRITE 4 LINES TO DECTAPE * PART DTW4 SUB JMS DTCKSM ADD TO DECTAPE CHECKSUM DCA DTTEMP STORE DATUM TEMPORARILY ROOM 9 1H IOS DK8,CLSK DID THE CLOCK TICK ? JMP D3B NO AIF DK8EP.EQ.0,.CONT IOT DK8,CLSA CLEAR THE CLOCK FLAG CLA .CONT INC DTCLOCK COUNT THE CLOCK TICKS D3B DSI KHLT SDSQ -- QUAD LINE FLAG SET ? ERM JMP 1B NO, WAIT FOR IT TAD DTTEMP GET DATUM D5A DI KHLT SDLD -- LOAD THE TD8E DATA REGISTER CLA SDLD DOES NOT CLEAR AC RET DTW4 * * COMPUTE EQUIVALENCE CHECKSUM * DTCKSM SUB CMA DCA DTTEMP ACTUALLY CHECKSUMS ON DECTAPE ARE TAD DTTEMP EQUIVALENCE OF ALL WORDS IN A RECORD AND DTSUM SIX BIT AT A TIME. SINCE EQUIVALANCE CIA IS ASSOCIATIVE, WE DO IT TWELVE AT A TIME CLL RAL AND CONDENSE LATER. TAD DTTEMP IDENTITIES USED ARE: TAD DTSUM A+B=(A.XOR.B)+2*(A.AND.B) DCA DTSUM A.EQU.B=.NOT.(A.XOR.B)=A.XOR.(.NOT.B) TAD DTTEMP A.EQU.B=(A+(.NOT.B))-2*(A.AND.(.NOT.B)) CMA RET DTCKSM * * FORM A 6-BIT CHECKSUM * DTGCHK SUB CLA TAD DTSUM CLL CMA RTL RTL RTL JMS DTCKSM CLA STL TAD DTSUM AND =07700 RET DTGCHK * * WAIT 100 MILLISECONDS * DTWAIT SUB CAL TAD =-TICKS/10 WASTE 100 MILLISECONDS DCA DTFLAG ROOM 2 JMS TD:CO RET DTWAIT * * TD8E IOT TABLES * DTIOT DC D1-1,D2-1,D3-1,D4-1,D5-1,D6-1,D7-1 * D1 DC D1A,D1B,D1C,0 D2 DC D2A,0 D3 DC D3A,D3B,0 D4 DC D4A,D4B,D4C,D4D,D4E,D4F,0 D5 DC D5A,0 D6 DC D6A,D6B,D6C,D6D,D6E,D6F,D6G,0 D7 DC D7A,D7B,0 * .DECTAPE ANOP TITLE SPECIAL EXECUTIVE ROUTINES AND SUBROUTINES * * .CLEAR * CLEAR A FIELD 1 BUFFER * * -- ENTERING -- -- EXITING -- * (INT) OFF OFF * (DF) ANYTHING %BUFFERS * (L) ANYTHING UNCHANGED * (AC) BUFFER ADDRESS -1 0000 * (MQ) -(BUFFER SIZE) UNCHANGED * MODIFIED: AXR2, CNTR * PART QCLEAR SUB CLEAR A FIELD 1 BUFFER DCA AXR2 MQA GET THE WORD COUNT DCA CNTR CDF %BUFFERS 1H DCAI AXR2 CLEAR THE BUFFER ISZ CNTR FINISHED ? JMP 1B NO RET QCLEAR * * THE EXECUTIVE DISK ROUTINE. THIS SUBROUTINE MANAGES * THE SYSTEM DISK. ALL SYSTEM DISK DATA TRANSFERS MUST PASS * THROUGH THIS SUBOURTINE. THE FORMAT ON THE QUEUE IS: * JOB NUMBER * FUNCTION WORD * BIT(S) PURPOSE * 0 0=READ; 1=WRITE * 1-5 PAGES IN TRANSFER * 6-8 MEMORY FIELD * 9-10 DISK DRIVE * 11 HIGH ORDER DISK ADDRESS * CORE ADDRESS * DISK BLOCK NUMBER * -- ENTERING -- -- EXITING -- * (INT) OFF OFF * (DF) RETURN FIELD SAME * (L) ANYTHING UNDEFINED * (AC) 0000 OR JOB NUMBER 0000 * (MQ) ANYTHING UNDEFINED * PART ROOM 3 QEXDRET CID %* QEXDISK SUB SNA WAS A JOB SPECIFIED ? TAD JOB NO, USE CURRENT JOB MQL RDF COMPUTE RETURN FIELD TAD =KCID CDF %* DCA QEXDRET TADI DQF SMA SZA CLA IS THE DISK QUEUE FULL ? HLT YES, AN UNLIKELY STATE OF AFFAIRS ! MQA DCAI DQF PUT JOB # ON QUEUE INC DQF BUMP THE POINTER TAD QFUNC GET FUNCTION WORD DCAI DQF INC DQF TAD QADDR GET MEMORY ADDRESS DCAI DQF INC DQF TAD QBLOCK GET DISK SECTOR ADDRESS DCAI DQF LDI 1 UPDATE THE QUEUE FILL POINTER TAD DQF AND =077 TAD =DQB DCA DQF MQA GET THE JOB NUMBER MULT64 TAD =JOB1-USER:ST+DWAIT COMPUTE ITS STATUS AREA ADDRESS DCA WTPNTR CDF %TABLES LDI -(DISKW+1) REMOVE DISK WAIT BIT, IF SET ANDI WTPNTR IAC NOW SET DISK WAIT BIT DCAI WTPNTR NEW JOB WAIT WORD TAD DSKJOB GET DISK BUSY FLAG SNA CLA IS THE DISK BUSY ? JMS QDISK NO, START IT JMP QEXDRET * * .SUSPEND * THIS IS THE JOB SCHEDULER. IT USES A STANDARD ROUND ROBIN * ALGORITHM FOR SCHEDULING ALL ACTIVE JOBS IN THE SYSTEM. * PART SCHEDULER DCA SKEDDW SAVE DEVICE WAIT BIT(S) IF ANY MQA DCA SKEDLW SAVE LOGIC WAIT BIT(S) IF ANY CDF %TABLES TAD JOB SZA IS THE NULL JOB RUNNING ? JMP CJOB NO SKED2 CDF %TABLES DCA JOB CLEAR THE CURRENT JOB DCAI =UJOB ALSO CLEAR THE USER JOB TAD INJOB SNA IS A JOB PRESENTLY LOADING INTO CORE ? JMP SKED4 NO MULT64 TAD =JOB1-USER:ST+DWAIT DCA NULLPTR LDI DISKW ANDI NULLPTR GET THE DISK WAIT BIT SNA CLA HAS IT COMPLETELY LOADED YET ? JMP SKED5 YES, SEE IF IT CAN BE STARTED NULL CAL DCA JOB JUST IN CASE IT WASN'T ALREADY CLEARED DCAX UJOB ALSO CLEAR THE USER JOB AIF NO:TD8E,.TD8E LDI 1 TAD DTFLAG GET THE TD8E SERVICE FLAG SNA CLA IS IT SET ? JMP RETURN YES, SERVICE IT .TD8E ION TAD TIME JUST DISPLAY THE TIME IN THE MQ,AC MQL TAD TIME+1 ROOM 2 INSURE JUMP IS TO THIS LOCATION ONLY JMP * * PART SKED5 LDI -1 BACK UP THE INJOB NUMBER BY 1 TAD INJOB DCA SKEDJOB SO IT WILL BE CHECKED NEXT DCA INJOB CLEAR THE INJOB SKED4 LDI -JOBS SET UP TO CHECK ALL JOB WAIT WORDS DCA SKEDCTR 1H LDI 1-JOBS TAD SKEDJOB SMA SZA CLA LOOKED AT HIGHEST NUMBERED JOB ? DCA SKEDJOB YES, START OVER AGAIN WITH JOB # 1 INC SKEDJOB BUMP THE JOB NUMBER TAD SKEDJOB GET THE NEW JOB NUMBER MULT64 TAD =JOB1-USER:ST+DWAIT DCA SKEDPTR POINT TO DEVICE WAIT BIT WORD TADI SKEDPTR GET IT SZA IS IT RUNNABLE ? JMP 2F NO INC SKEDPTR PERHAPS, CHECK THE LOGIC WAITS LDI 07776 Set AC to mask all except extended quantum. ANDI SKEDPTR ... SNA IS IT RUNNABLE ? JMP SKEDX YES, ABSOLUTELY JMP SKED3 PERHAPS 2H CLL RAR ROTATE DISK WAIT BIT TO LINK SZA CLA ANY OTHER WAIT BITS SET ? JMP SKED6 YES, FORGET IT TAD INJOB CHECK FOR A LOADING JOB SZA CLA IS A JOB PRESENTLY LOADING INTO MEMORY ? JMP SKED6 YES, TAKE NO FURTHER ACTION TAD SKEDJOB NO, MAKE THIS THE NEXT JOB EXECUTED DCA INJOB JMP SKED2 * SKED6 CAL MAY BE GARBAGE IN THE AC ISZ SKEDCTR CHECKED ALL JOBS ? JMP 1B NO JMP NULL YES, JUST RUN THE NULL JOB * PART SKED3 MQL SAVE THE LOGIC WAIT BITS MQA AND =HALTW+REALW SZA CLA A HALT OR REAL TIME WAIT ? JMP SKED6 YES, FORGET IT MQA CLL RTL CHECK NON-RESIDENT WAIT SZL A NON-RESIDENT WAIT ? JMP NRJOB YES CLL RAL CHECK EXECUTIVE WAIT SZL A SPECIAL EXEC WAIT ? JMP CIFJOB YES CLL RAL CHECK JMS WAIT SZL CLA A JMS WAIT ? LDI -1 YES SKEDX DCA SKEDTEM SET/CLEAR THE JMS FLAG TAD SKEDPTR SCHEDULE THIS JOB FOR EXECUTION NOW DCA AXR2 JMS GETREG GET THE HARDWARE REGISTERS LDI 1 Set AC to look at extended time quantum bit. ANDI SKEDPTR Get the extended time quantum bit. SZA CLA Is it set ? TAD =QUANTUM-500 Yes, give this job a long time slice next time. TAD =-QUANTUM SET THE TIME QUANTUM DCA JTIME TAD SKEDJOB GET THE JOB NUMBER DCA JOB MAKE IT THE CURRENT JOB TAD JOB CDF %UJOB ALSO SET USER INTERRUPT DCAI =UJOB PROCESSOR JOB NUMBER ISZ SKEDTEM A JMS WAIT ? JMP RETURN NO, START THE JOB TAD =JMSPC-SC TAD AXR2 DCA PNTR1 TAD FLSV GET THE USER FLAGS AND =070 EXTRACT THE PHYSICAL 'IF' TAD =KCDF COMPUTE A 'CDF' ROOM 5 DCA 1F PUT IT IN THE CODING LINE TADI PNTR1 GET THE RETURN PC ERM 1H HLT 'CDF' TO 'JMS' FIELD DCAI QPCSV STORE THE RETURN PC CDF %TABLES TAD PNTR1 TAD =LWAIT-JMSPC DCA PNTR1 DCAI SKEDPTR CLEAR 'JMS' WAIT (THE ONLY REMAINING WAIT) ISZ QPCSV BUMP THE PC JMP RETURN JMP RETURN SAFETY * PART CIFJOB CAL RESTART 'CIF' SIMULATIONS TADI SKEDPTR GET JOB LOGIC WAIT BITS AND =-(EXECW+1) REMOVE SPECIAL EXEC WAIT BIT DCAI SKEDPTR TAD SKEDPTR DCA AXR2 TADI AXR2 GET JOB FLAGS DCAI =UFLSV TADI AXR2 GET JOB PC DCAI =UPCSV TADI AXR2 GET JOB AC DCAI =UACSV TADI AXR2 GET JOB MQ DCAI =UMQSV TADI AXR2 GET JOB SC AIF NO:EAE,.EAE SPA WHICH EAE MODE ? STL MODE 'B' CMA ROOM 4 DCA 1F DI SCL LOAD THE SC ERM 1H HLT AIF PDP8I,.EAE SZL WHICH MODE ? SWAB MODE 'B' .EAE ANOP INCI =ULOCK TAD =JMSAVE-SC-1 TAD AXR2 DCA AXR TADI AXR GET THE RETURN ADDRESS DCA PNTR1 1H TADI AXR GET THE ITEMS TO BE RESTORED TO DCA PNTR2 USER INTERRUPT PROCESSOR TADI AXR SNA END OF LIST ? JMP 2F YES DCAI PNTR2 JMP 1B * 2H TAD =-QUANTUM SET TIME QUANTUM DCA JTIME TAD SKEDJOB GET THE SCHEDULER JOB NUMBER DCA JOB MAKE IT THE CURRENT JOB TAD JOB DCAI =UJOB ALSO MAKE IT THE USER INTERRUPT JOB ROOM 3 CIF %KM8E ERM JMPI PNTR1 RESTART THE JOB * PART NRJOB LDI 1 JOB IS NON-RESIDENT TAD SKEDPTR DCA PNTR1 POINT TO JOB FLAGS TADI PNTR1 GET THEM RAR RTR AND =07 EXTRACT RELATIVE 'IF' CIA TADI PNTR1 AND =07 SZA CLA IS 'IF' = 'DF' ? LDI 1 NO, TWO PHYSICAL FIELDS REQUIRED DCA SKEDTEM SAVE INFO TEMPORARILY HERE TAD SKEDTEM GET FIELD REQUIREMENTS (0=1 FIELD; 1=2 FIELDS) .AVMEM IS SUFFICIENT MEMORY AVAILABLE ? JMP NRJOB2 NO NRJOBM .FINDM YES, FIND AN AVAILABLE MEMORY FIELD DCA FPNTR SAVE ADDRESS OF FIELD INFO WORD TAD FPNTR COMPUTE PHYSICAL FIELD NUMBER TAD =-FIELD0 CLL RAL RTL DCA QFUNC CDF %TABLES TADI PNTR1 GET JOB RELATIVE FLAGS CDF %* MQL MQA AND =070 EXTRACT RELATIVE 'IF' TAD =IF ADD 'IF' RESIDENCY BIT TAD SKEDJOB ADD JOB NUMBER DCAI FPNTR SET THE FIELD INFO WORD MQA GET JOB RELATIVE FLAGS AGAIN AND =06107 EXTRACT LINK, 'GT' AND 'UM', & REL 'DF' TAD QFUNC ADD PHYSICAL FIELD NUMBER DCA FLSV PARTIAL JOB FLAGS DCA QADDR ZERO MEMORY ADDRESS MQA GET JOB RELATIVE FLAGS AND =070 EXTRACT JOB RELATIVE 'IF' TAD SKEDJOB ADD JOB NUMBER .FINDB FIND THE DISK SWAP BLOCK DCA QBLOCK TAD SKEDJOB .EXDISK QUEUE THE REQUEST TAD SKEDTEM GET THE NUMBER OF FIELDS REQUIRED SNA CLA WERE TWO FIELDS REQUIRED ? JMP 1F NO .FINDM FIND A PHYSICAL FIELD DCA FPNTR TAD FPNTR COMPUTE PHYSICAL FIELD NUMBER TAD =-FIELD0 CLL RAL RTL DCA QFUNC TAD FLSV AND =07 EXTRACT RELATIVE 'DF' CLL RAL RTL TAD SKEDJOB DCAI FPNTR SET THE FIELD INFO WORD TAD FPNTR TAD =-FIELD0 COMPUTE PHYSICAL FIELD MQL TAD FLSV AND =07770 REMOVE RELATIVE 'DF' MQA BRING UP PHYSICAL 'DF' DCA FLSV TADI FPNTR GET THE RELATIVE 'DF' AND JOB NUMBER .FINDB FIND THE DISK SWAP BLOCK DCA QBLOCK TAD SKEDJOB .EXDISK QUEUE THE REQUEST JMP 2F * 1H TAD FLSV GET JOB PARTIAL FLAGS AND =07770 REMOVE RELATIVE 'DF' MQL MQA AND =070 EXTRACT PHYSICAL 'IF' CLL RAR RTR MQA SKP 2H TAD FLSV ADD JOB PARTIAL FLAGS CDF %TABLES DCAI PNTR1 NEW JOB FLAGS LDI -(NRESW+1) REMOVE NON-RESIDENT WAIT BIT ANDI SKEDPTR DCAI SKEDPTR CDF %* LDI DF SET THE 'DF' RESIDENCY BIT TADI FPNTR DCAI FPNTR TAD SKEDJOB GET THE JOB NUMBER AND SET DCA INJOB JOB LOADING FLAG JMP NULL AND WAIT FOR SWAP COMPLETION * PART NRJOB2 TAD =FIELD2 DCA FPNTR TAD =-6 DCA CNTR 1H TADI FPNTR GET A FIELD INFO WORD SNA IS THIS FIELD IN USE ? JMP 2F NO AND =IF+DF+LOCK+N:EXIST SZA CLA IS THIS A JOB'S 'IF', 'DF' OR LOCKED ? JMP 2F YES, IGNORE IT LDI 04000 .SWAPF SWAP THE FIELD OUT TO DISK DCAI FPNTR CLEAR THE FIELD INFO WORD 2H INC FPNTR BUMP FIELD INFO WORD POINTER ISZ CNTR CHECKED ALL FIELDS ? JMP 1B NO, KEEP LOOKING TAD SKEDTEM GET THE FIELD REQUIREMENTS .AVMEM SUFFICIENT MEMORY AVAILABLE NOW ? JMP NRJOB3 NO JMP NRJOBM YES, SET UP TO SWAP INTO MEMORY * PART NRJOB3 TAD =FIELD2 DCA FPNTR TAD =-6 DCA CNTR 1H CDF %* SAFETY TADI FPNTR GET A FIELD INFO WORD SNA IS THIS FIELD IN USE ? JMP 4F NO MQL MQA AND =LOCK+N:EXIST SZA CLA IS IT LOCKED IN MEMORY OR NON-EXISTANT ? JMP 4F YES, LEAVE IT ALONE MQA GET THE FIELD INFO WORD AGAIN AND =07 EXTRACT JOB NUMBER MULT64 TAD =JOB1-USER:ST+LWAIT DCA PNTR2 POINT TO JOB WAIT WORD CDF %TABLES LDI -(NRESW+1) REMOVE NON-RESIDENT BIT, IF SET ANDI PNTR2 TAD =NRESW NOW SET IT DCAI PNTR2 NEW JOB WAIT WORD INC PNTR2 POINT TO JOB FLAGS MQA AND =IF EXTRACT 'IF' RESIDENCY BIT SNA CLA IS THIS THE JOB'S 'IF' ? JMP 2F NO MQA AND =070 EXTRACT JOB RELATIVE FIELD DCA TEMP TADI PNTR2 GET JOB FLAGS AND =07707 REMOVE PHYSICAL 'IF' TAD TEMP ADD RELATIVE 'IF' DCAI PNTR2 2H MQA AND =DF EXTRACT 'DF' RESIDENCY BIT SNA CLA IS THIS THE JOB'S 'DF' ? JMP 3F NO MQA AND =070 EXTRACT RELATIVE 'DF' CLL RAR RTR DCA TEMP TADI PNTR2 GET JOB FLAGS AND =07770 REMOVE PHYSICAL 'DF' TAD TEMP ADD RELATIVE 'DF' DCAI PNTR2 3H CDF %* SAFETY LDI 04000 .SWAPF SWAP THE FIELD TO DISK DCAI FPNTR RELEASE MEMORY 4H INC FPNTR Bump field info word pointer ISZ CNTR CHECKED ALL FIELDS ? JMP 1B NO TAD SKEDTEM GET FIELD REQUIREMENTS .AVMEM SUFFICIENT MEMORY AVAILABLE NOW ? JMP NULL NO JMP NRJOBM YES, SET UP TO SWAP INTO MEMORY * PART CJOB DCA SKEDJOB MAKE IT THE LAST JOB CHECKED TAD SKEDJOB MULT64 TAD =JOB1-USER:ST+DWAIT DCA SKEDPTR DEVICE WAIT WORD ADDRESS COMPUTED TADI SKEDPTR GET PREVIOUS DEVICE WAIT BITS MQL TAD SKEDDW GET NEW DEVICE WAIT BITS MQOR DCAI SKEDPTR STORE NEW COMBINED DEVICE WAIT BITS TAD SKEDLW GET NEW LOGIC WAIT BIT(S) MQL INC SKEDPTR POINT TO OLD LOGIC WAIT BIT(S) TADI SKEDPTR GET THEM MQOR BRING UP NEW WAIT BITS DCAI SKEDPTR SAVE NEW COMBINED LOGIC WAIT BIT(S) MQA GET LOGIC WAIT BITS AGAIN SMA CLA IS THE HALT WAIT BIT SET ? JMP 1F NO LDI -TERMS TAD JOB SPA SNA CLA IS THIS AN EXECUTIVE TASK ? JMP 1F NO TAD FLSV YES, GET ITS FLAGS AND =07 EXTRACT ITS PHYSICAL 'DF' TAD =FIELD0 COMPUTE ADDRESS OF ITS FIELD INFO WORD DCA FPNTR CDF %* DCAI FPNTR RELEASE THE MEMORY WITHOUT SWAPPING OUT JMP SKED2 * 1H TAD SKEDPTR DCA AXR2 JMS SAVREG SAVE THE HARDWARE REGISTERS TAD SKEDLW GET THE CURRENT LOGIC WAIT BITS RAL SMA SNL CLA IS 'HALTW' OR 'NRESW' SET ? JMP SKED2 NO PART SWAPJ CDF %* TAD JOB ALWAYS THE CURRENT JOB NUMBER CIA DCA TEMP TAD FLSV GET INTERRUPT FLAGS AND =RELBIT SZA CLA IS THE RELATIVE FIELDS BIT SET ? JMP 1F YES TAD FLSV GET INTERRUPT FLAGS MQL MQA AND =070 EXTRACT PHYSICAL FIELD CLL RAR ROTATE TO BITS 9-11 RTR TAD =FIELD0 DCA FPNTR TADI FPNTR GET FIELD INFO WORD AND =070 EXTRACT USER FIELD NUMBER SWP GET JOB FLAGS AND =07707 MASK OUT 'IF' MQA BRING UP USER RELATIVE 'IF' MQL MQA AND =07 EXTRACT PHYSICAL 'DF' TAD =FIELD0 DCA FPNTR TADI FPNTR GET FIELD INFO WORD AND =070 EXTRACT USER 'DF' CLL RAR ROTATE TO BITS 9-11 RTR SWP GET JOB FLAGS AND =07770 MASK OUT PHYSICAL 'DF' MQA BRING UP USER RELATIVE 'DF' INC SKEDPTR POINT TO JOB FLAGS CDF %TABLES DCAI SKEDPTR STORE THE FLAGS CDF %* 1H TAD =FIELD2 DCA FPNTR TAD =-6 DCA CNTR 2H TADI FPNTR GET A FIELD INFO WORD AND =07 EXTRACT ONLY THE JOB NUMBER TAD TEMP COMPARE WITH THIS JOB NUMBER SZA CLA IS IT THIS JOB ? JMP 3F NO LDI 04000 YES .SWAPF WRITE THE FIELD TO SWAP TRACKS DCAI FPNTR RELEASE MEMORY 3H INC FPNTR BUMP THE FIELD INFO WORD POINTER ISZ CNTR LOOKED AT ALL FIELD INFO WORDS ? JMP 2B NO JMP SKED2 CHECK ON NEXT JOB * * GET THE HARDWARE REGISTERS * ENTER WITH AXR2 SET TO LOC -1 AND 'DF' = 'TABLES * PART GETREG SUB TADI AXR2 GET THE FLAGS DCA FLSV TADI AXR2 GET THE PC DCA QPCSV TADI AXR2 GET THE AC DCA ACSV TADI AXR2 GET THE MQ DCA MQSV TADI AXR2 GET THE SC AIF NO:EAE,.EAE AIF PDP8I,.PDP8I CLL SPA WHICH MODE ? STL MODE B .PDP8I ANOP CMA ROOM 4 DCA 1F DI SCL LOAD THE STEP COUNTER ERM 1H HLT AIF PDP8I,.EAE SZL WHICH EAE MODE ? SWAB MODE B .EAE RET GETREG * * SAVE THE HARDWARE REGISTERS * ENTER WITH AXR2 SET TO LOC -1 AND 'DF' = 'TABLES' * PART SAVREG SUB TAD FLSV GET THE FLAGS DCAI AXR2 TAD QPCSV GET THE PC DCAI AXR2 TAD ACSV GET THE AC DCAI AXR2 TAD MQSV GET THE MQ DCAI AXR2 AIF NO:EAE,.EAE AIF PDP8I,.PDP8I MQL INSURE MQ IS CLEAR ROOM 4 DSI DPSZ WHAT IS EAE MODE ? SKP CLA MODE 'A' LDI 04000 SET MODE 'B' FLAG DI SWBA INSURE MODE IS NOW 'A' .PDP8I DI SCA GET THE SC DCAI AXR2 .EAE RET SAVREG * * .AVMEM * CHECK FOR AVAILABLE MEMORY * * -- ENTERING -- -- EXITING -- * (INT) OFF OFF * (DF) ANYTHING %* * (L) ANYTHING UNCHANGED * (AC) FIELDS NEEDED -1 0000 * (MQ) ANYTHING UNCHANGED * MODIFIED: TEMP, CNTR, AXR2 * IF MEMORY IS NOT AVAILABLE, RETURN IS TO CALL +1; * OTHERWISE TO CALL +2. * PART QAVMEM SUB CDF %* CMA DCA TEMP SAVE COMPLEMENTED FIELD COUNT TAD =-6 DCA CNTR TAD =FIELD1 DCA AXR2 1H TADI AXR2 LOOK AT A FIELD INFO WORD SZA CLA THIS FIELD AVAILABLE ? JMP 2F NO ISZ TEMP YES, FOUND NEEDED MEMORY ? JMP 2F NO INC QAVMEM YES, BUMP RETURN POINTER RET QAVMEM * 2H ISZ CNTR CHECKED ALL FIELD INFO WORDS ? JMP 1B NO RET QAVMEM * * .FINDM * FIND AN AVAILABLE MEMORY FIELD * * -- ENTERING -- -- EXITING -- * (INT) OFF OFF * (DF) ANYTHING %* * (L) ANYTHING UNCHANGED * (AC) 0000 0000 IF NO MEMORY AVAILABLE * ADDR OF FIELD INFO IF MEMORY AVAILABLE * (MQ) ANYTHING UNCHANGED * MODIFIED: AXR2, CNTR * PART QFINDM SUB CDF %* TAD =FIELD1 INITIALIZE DCA AXR2 TAD =-6 DCA CNTR 1H TADI AXR2 LOOK FOR AN AVAILABLE FIELD SNA CLA FOUND ONE YET ? JMP 2F YES ISZ CNTR LOOKED AT ALL FIELDS YET ? JMP 1B NO RET QFINDM YES, NO MEMORY AVAILABLE * 2H TAD AXR2 GET THE ADDRESS OF THE FIELD INFO WORD RET QFINDM * * .FINDF * FIND A FIELD FROM INFO CONTAINED IN THE AC AND MQ * * -- ENTERING -- -- EXITING -- * (INT) OFF OFF * (DF) ANYTHING %* * (L) ANYTHING UNDEFINED * (AC) MATCH BIT PATTERN 0000 IF NO MATCH FOUND * ADDR OF FIELD INFO IF MATCH FOUND * (MQ) MATCH MASK UNCHANGED * MODIFIED: AXR2, TEMP, CNTR * PART QFINDF SUB CIA DCA TEMP SAVE NEGATED MATCH BIT PATTERN CDF %* TAD =FIELD1 DCA AXR2 TAD =-6 DCA CNTR 1H MQA GET THE MASK ANDI AXR2 MASK THE FIELD INFO WORD TAD TEMP SNA CLA A MATCH ? JMP 2F YES ISZ CNTR CHECKED ALL FIELD INFO WORDS ? JMP 1B NO RET QFINDF YES * 2H TAD AXR2 GET THE ADDR OF THE FIELD INFO WORD RET QFINDF * * .FINDB * FIND A DISK SWAP BLOCK BASED ON INFO IN AC * * -- ENTERING -- -- EXITING -- * (INT) OFF OFF * (DF) ANYTHING %* * (L) ANYTHING UNCHANGED * (AC) BITS: INFO: DISK SWAP BLOCK NUMBER * 0-3 MEM ADDR * 6-8 USER FIELD * 9-11 JOB NUMBER * (MQ) ANYTHING 0000 * MODIFIED: TEMP * PART QFINDB SUB CDF %* TAD =-1 BACK UP JOB TO CREATE OFFSET MQL MQA AND =07 EXTRACT MAJOR OFFSET RAR6 DCA TEMP MQA AND =070 EXTRACT USER FIELD TAD TEMP ADD MAJOR OFFSET CLL RAL SWP AND =07400 EXTRACT MEMORY ADDRESS INFO CLL RTR ROTATE TO BITS 8-11 RAR6 MQA RELATIVE SWAP SECTOR NOW COMPUTED TAD =SWAP ADD SWAP SECTOR BIAS RET QFINDB * * .SWAPF * SWAP A FIELD TO/FROM DISK SWAP BLOCKS * * -- ENTERING -- -- EXITING -- * (INT) OFF OFF * (DF) CALLING FIELD UNCHANGED * (L) ANYTHING UNDEFINED * (AC) 0000 IF READ 0000 * 4000 IF WRITE * (MQ) ANYTHING QUEUE JOB NUMBER * FPNTR ADDR OF AFFECTED * FIELD INFO WORD * MODIFIED: QFUNC, QADDR, QBLOCK * PART ROOM 3 QSWAPFR CID %* QSWAPF SUB DCA QFUNC STORE THE READ/WRITE BIT (BIT 0) RDF COMPUTE RETURN FIELD TAD =KCID CDF %* DCA QSWAPFR TAD FPNTR TAD =-FIELD0 COMPUTE PHYSICAL FIELD NUMBER CLL RAL ROTATE TO BITS 6-8 RTL TAD QFUNC ADD READ/WRITE BIT DCA QFUNC FUNCTION WORD NOW COMPLETE 3H LDI -1 TADI FPNTR GET FIELD INFO WORD AND =07 EXTRACT MAJOR OFFSET MULT64 DCA QBLOCK SAVE TEMPORARILY TADI FPNTR AND =070 EXTRACT USER FIELD NUMBER TAD QBLOCK ADD MAJOR OFFSET CLL RAL 4H TAD =SWAP ADD IN SWAP TRACK BIAS DCA QBLOCK SET DISK SECTOR ADDRESS DCA QADDR SET MEMORY ADDRESS TADI FPNTR GET FIELD INFO WORD AND =07 EXTRACT JOB NUMBER .EXDISK QUEUE THE DISK REQUEST JMP QSWAPFR AIF PDP8E.OR.(PDP8I.AN.NO:EAE),.MQ * * SOFTWARE SIMULATION OF CERTAIN 'MQ' FUNCTIONS * QMQOR SUB 'OR' AC WITH 'MQ' DCA CPU:TEM STORE AC TEMPORARILY TAD CPU:MQ CMA AND CPU:TEM TAD CPU:MQ RET QMQOR * QCAM SUB CLEAR AC AND 'MQ' CLA DCA CPU:MQ RET QCAM * QSWP SUB 'SWP' AND AND 'MQ' DCA CPU:TEM SAVE AC TEMPORARILY TAD CPU:MQ DCA CPU:AC TAD CPU:TEM DCA CPU:MQ TAD CPU:AC RET QSWP * .MQ ANOP * * Compute highest address used in this field. * .END