X-Git-Url: http://git.sky-visions.com/cgi-bin/gitweb.cgi/retro-software/dec/tops10/v4.5.git/blobdiff_plain/4004a326545fc294821707378dd8e6b026df8be1..8c11230d54654d010d9027c672dcf4011d2cf539:/src/dtasrn.mac diff --git a/src/dtasrn.mac b/src/dtasrn.mac index c0530cc..1386af8 100644 --- a/src/dtasrn.mac +++ b/src/dtasrn.mac @@ -31,6 +31,7 @@ MINDIS=14 ;MINMUM NUMBER OF BLOCKS TO SEARCH BEFORE DISCONNECTING ;FROM A TAPE SPACE=4 ;NUMBER OF BLOCKS SEPERATING CONTIGUOUS BLKS OF A FILE + ;DDB MAGIC CELLS FSTBLK=13 DLOC=14 @@ -43,6 +44,7 @@ SVDWRD=21 UDSD=100 LSTSAV=20000 + ;FLAGS IN LH OF IOS NOLINK=200 CHNGDR=400 @@ -57,10 +59,10 @@ REWBIT=100000 RUNBIT=200000 RECKON=400000 ;THIS TAPE IS DEAD-RECKONING. ; (MUST BE SIGN BIT) - CPBIT=-1 ;FEATURE TEST TO ALLOW IO INTO USER AREA DIRECTLY ;IT WILL ONLY HAPPEN ON DUMP MODE WITH NON-STANDARD BIT ;(UDSD) ON + EXTERN JIFSEC INTERN DTAINT,DTADDB,DTAINI,DTADDS,DTADSP @@ -71,18 +73,15 @@ DTADDB: SIXBIT /DTA0/ EXP DTADSP XWD 1107,154403 EXP 0,0 - XWD PROG,0 XWD PROG,0 EXP 0,0,0 - EXP DTADIR EXP 0,0,0,0,0 - - DTADIR: BLOCK 200 DTADDS=.-DTADDB + JRST DTAINI JRST HUNGTP ;HUNG DEVICE DTADSP: JRST UREL @@ -106,6 +105,7 @@ DTADSP: JRST UREL SOJA TAC1,MTAP0 POPJ PDP, ;OTHERS ARE NO-OPS + ;INITIALIZE DTC DTAINI: CONO DTC,0 SETZM DISCON @@ -179,7 +179,6 @@ RENAM1: TLO IOS,CHNGDR ;DIRECTORY HAS CHANGED ;COME HERE TO RENAME TO A REAL NEW NAME RENAM2: MOVE DAT,TAC ;SAVE LOC OF NAME IN DIRECTORY - PUSHJ PDP,DSERCH ;SEARCH FOR NEW NAME SKIPA ;NOT FOUND - GOOD JRST RENER2 ;NAME ALREADY EXISTS - ERROR @@ -282,7 +281,6 @@ DECPTR: JUMPL DAT,.+5 SOJA DAT,CPOPJ HRLI DAT,060500 SOJA DAT,CPOPJ - ;COME HERE TO DELETE THE FILE WHOSE INDEX IS INN TAC DLETE: MOVEI TAC1,0 ;SET TO DELETE BLOCKS PUSHJ PDP,BLKSRC ;FIND A BLOCK BELONGING TO FILE @@ -351,12 +349,12 @@ DRPTR: SUBI BLK,1 ;SET FOR ILDB OR IDPB ;HERE FOR NEW FILE NAME ON ENTER NEWENT: SUB TAC,[XWD 26,26];START AT BEGINNING OF DIRECT. - SKIPN (TAC) ;FIND A FREE SLOT AOJA UUO,ENTR2 ;RETURN WITH UUO POINTING TO WRD 2 AOBJN TAC,.-2 POPJ PDP, ;NONE AVAILABLE. + ;SET UP LENGTH OF FILE IN DIRECTORY FOR A SAVE FILE SETWD4: HLRE TAC1,@UUO ;GET -LENGTH MOVNS TAC1 ;+LENGTH @@ -391,6 +389,7 @@ GETF: PUSHJ PDP,WAIT1 ;WAIT TILL BUFFERES EMPTY MOVE TAC,BLK ;TELL USER THE BLOCK NUMBER JRST STOTAC + ;GET NEXT (OR PREVIOUS) FREE BLOCK USRFRE: MOVEI TEM,SPACE ;BLOCKS "SPACE" APART LDB BLK,PIOMOD ;EXCEPT DUMP AND SAVMOD FILES @@ -415,6 +414,7 @@ USRLST: SUBI BLK,(TEM) ;LOOK FOR FREE BLOCK N BEFORE USLSTA: PUSHJ PDP,LSTFRE ;THIS ONE JRST CALNXT+1 + ;NO FREE BLOCKS AVAILABLE. GIVE HIGH BLOCK,SET IOBKTL LATER NOBLKS: MOVEI BLK,TOPBLK+1 ;SET HIGH BLOCK POPJ PDP, @@ -450,6 +450,8 @@ UCLS: TLZE IOS,NOLINK ;IS LAST BLOCK NOT LINKED? MOVEM IOS,DEVIOS(DEVDAT) ;SAVE IOS JRST OUT ;GO TO WRITE RECORD + + ;HERE TO CLOSE A DUMP MODE FILE CLSDMP: TLO IOS,DMPCLS+IO+DMPMOD ;SET SWITCHES PUSHJ PDP,GETDT ;GET CONTROL @@ -473,9 +475,9 @@ UREL: PUSHJ PDP,WAIT1 ;MAKE SURE THE TAPE IS STOPPED PUSHJ PDP,WRTBLK ;WRITE UT PUSHJ PDP,WAIT1 ;WAIT TILL IT HAS BEEN WRITTEN + UREL2: MOVE TAC,DEVIAD(DEVDAT) ;BITS 1,2 ARE COUNT OF CHANS TLNE TAC,200000 ;DEV INITED ON ANOTHER CHANNEL TOO? - QUANTL: POPJ PDP,QUANT ;YES, DON'T ZAP IOS OR DDB ;SOME BITS IN THE IOS WORD AND THE DDB WILL NORMALLY BE CHANGED ON THE @@ -487,6 +489,8 @@ QUANTL: POPJ PDP,QUANT ;YES, DON'T ZAP IOS OR DDB ;IT WILL WORK (CHECK IS MADE AT ENTER) SETZM FSTBLK(DEVDAT) JRST STOIOS ;STORE IOS AND RETURN + + GETDT0: PUSHJ PDP,SETACT ;WAIT TILL TAPE COMES OUT OF REWIND PUSHJ PDP,WSYNC ;BEFORE DOING ANYTHING ELSE TO IT ;GET DEC TAPE CONTROLLER @@ -536,7 +540,6 @@ UIN: TLZ IOS,IO JUMPE BLK,EOF ;0 MEANS EOF PUSHJ PDP,BLKCHK ;CHECK LEGALITY OF BLOCK NUMBER TLNN IOS,DMPMOD ;DUMP MODE? - CAIE BLK,DIRBLK ;TRYING TO READ DIRECTORY? JRST READBF ;NO. GO READ @@ -561,6 +564,7 @@ EOF: TLO IOS,IOEND ;LIGHT EOF BIT JRST STOIOS JRST DMPEOF ;GIVE UP CONTROL IF DUMP-MODE + ;ZERO USER'S CORE ON SAVE-MODE INPUT ZERCOR: MOVEI TAC,JOBDDT(PROG) ;ZERO CORE HRLI TAC,1(TAC) @@ -590,7 +594,6 @@ UOUT: TLO IOS,IO CAIN BLK,DIRBLKK ;CHECK IF WRITING DIRECTORY JRST COR2HM ;YES, WRITE CORE IMAGE JUMPE BLK,FAKADV ;DONT WRITE IF NO BLOCK GIVEN - PUSHJ PDP,BLKCHK ;CHECK FOR LEGAL BLOCK UOUT2: TLNN IOS,DMPMOD ;ALREADY HAVE CONTROL IF DUMP-MODE PUSHJ PDP,GETDT ;GET DEC TAPE CONTROLLER @@ -623,6 +626,7 @@ OUTBLK: HRLM BLK,BUF ;SAVE LINK IN 1ST WORD OF BLOCK OUTBL2: HRRZ BLK,OBLK(DEVDAT) PUSHJ PDP,STOIOS + WRTBLK: PUSHJ PDP,FNDBLK ;GO SEARCH FOR BLOCK MOVE TAC1,[BLKO DTC,700] ;HERE WE ARE - GO WRITE JRST RDWRT @@ -664,6 +668,7 @@ DMPST2: SOS UUO ;NO. SAVE START OF LIST (-1) DMPTS1: POP PDP,TAC JRST THRUTD + IFN CPBIT, < ;HERE TO START DUMP-MODE INTO USER AREA DIRECTLY TOUSER: JUMPE AC2,NOBLK0 ;CANT READ BLK 0 IN NON-STD DUMP MODE @@ -684,6 +689,7 @@ TOUSR1: MOVEM UUO,USPNTR ;SAVE IT POP PDP,TAC ;WRITING - THIS WILL SAVE LOTS OF TIME JRST OUTBL2 + NOBLK0: TRO IOS,IOIMPM POP PDP,TAC ;RETURN TO UUOCON WITH ERROR BIT SET JRST THRUTD @@ -727,6 +733,7 @@ DMPOVA: MOVEI TAC,177 MOVEM TAC,BUF ;WD CNT =177 JRST OUFULL ;GO WRITE PART OF STUFF + ;GET NEXT COMMAND FROM LIST NXTCOM: SKIPN DMPLST(DEVDAT) ;END OF COMMANDS? JRST NXTCM2 ;YES. RETURN @@ -737,11 +744,13 @@ NXTCM1: HRRM TAC,DMPLST(DEVDAT) ;STORE GO-TO ADDRESS JUMPG TAC,NXTCM1 ;GO-TO WORD ADDI TAC,(PROG) ;REAL COMMAND - ADD RELOCATION AOJA TAC,CPOPJ1 ;AND RETURN + ;END OF DUMP-MODE LIST NXTCM2: SETZM SVDWRD(DEVDAT) ;ZERO POINTERS SETZM DMPLST(DEVDAT) POPJ PDP, + DMPFLC: SKIPE TAC,SVDWRD(DEVDAT) ;IS THERE ANOTHER COMMAND JRST DMPFLA ;YES. GET IT JRST DMPTH2 ;NO. THROUGH @@ -764,7 +773,6 @@ RDWRT: HLLM TAC1,IOWD ;BLKI OR BLKO SKIPA TAC,BFPNTR ;NO. INTO BUF HRR TAC,DLOC(DEVDAT) ;YES. LOC OF DIRECTORY CONSZ DTC,100000 ;IN REVERSE? - JRST IORVRS ;YES SOS TAC ;ADDRESS -1 MOVE TEM,IOWD ;GET IOWD @@ -784,6 +792,7 @@ IORVRS: ADDI TAC,176 ;START AT TOP OF BUFFER MOVE TEM,[JSR RVERS] JRST IOGO ;COMPILCATED STUFF FOR EACH WORD + ;HERE FOR AY DATA WORD WITH TAPE IN REVERSE RVERS: 0 IOWD: BLKI DTC,PNTR ;READ (WRITE) A WORD @@ -810,6 +819,7 @@ MTAP0: PUSHJ PDP,GETDT ;GET THE CONTROL FOR THE TAPE MOVEI BLK,0 ;SEARCH FOR BLOCK 0 PUSHJ PDP,FNDBLK ;GO FIND BLOCK + ;CONTROL COMES HERE ON INTERRUPT CHANNEL WHEN THE BLOCK IS FOUND TLNE IOS,RUNBIT ;REWIND UNLOAD? JRST .+3 ;YES, CONTINUE @@ -829,6 +839,7 @@ RUNCLK: MOVE DEVDAT,USEWRD MOVE IOS,DEVIOS(DEVDAT) ;RESET IOS JRST REWDUN ;DECREASE DTREQ. STOP TAP + ;HERE TO PUT C(TAC) IN THE CLOCK QUEUE CLKREQ: 0 CONO PI,PIOFF ;TURN OFF PI @@ -877,7 +888,8 @@ SRCH: 0 TLNE TAC,2000 ;IS CONTROL STILL ACTIVE? JRST SRCHD ;YES. MUST BE IN "PSEUDO END-ZONE" DATAI DTC,TAC ;NO. READ A BLOCK NUMBER - TLZ TAC,-1 ;LEGAL BLOCK NUMBER> + TLZ TAC,-1 ;INSURANCE + CAILE TAC,TOPBLK ;LEGAL BLOCK NUMBER? JRST SRCHB ;NO. SET ERROR SWITCH SUB TAC,BLOCK ;NOW-WANTED IFN CPBIT, < @@ -888,7 +900,6 @@ SRCH: 0 SRCHA: CONSZ DTC,100000 ;IF TAPE IS IN REVERSE MOVNS TAC ;SWITCH TURN-AROUND TEST JUMPLE TAC,.+3 ;TEST FOR DISCONNECT IF DIRECTION IS CORRECT - ;*** CONO DTC,DTTURN ;TURN AROUND JRST SRCHXT ;AND GO AWAY @@ -913,6 +924,7 @@ SRCHB: AOS TAC,ERRCNT ;BUMP ERROR COUNT CONO DTS,770001 ;FUNCTION STOP JRST SRCHXT ;GO AWAY + IFN CPBIT, < SRCHC: CONSZ DTC,100000 ;GOING FORWARD? TLCA TAC,400000 ;NO. SWITCH TURN AROUND TEST. ENSURE FORWARD @@ -946,7 +958,6 @@ REKON: SKIPN IOWRIT ;MONITOR BUFFER FULL? LDB TAC1,PJOBN ;ASSOCIATED JOB NUMBER HRRM TAC1,MONB2 ;SAVE IN WD 2 OF MONITOR BUFFER HRLM DEVDAT,MONB2 ;SAVE ADDRESS OF DTA - CONSZ DTC,200000 IMULI TAC,62 ;COMPUTE A TIME TO BLOCK CONSZ DTC,100000 ;BASED ON 50 MSEC/BLOCK FORWARD @@ -993,6 +1004,7 @@ NXTICK: MOVE TAC,TIMRQ2 ;COME BACK IN A JIFFY TIMREQ: XWD BACK,0 TIMRQ2: XWD BACKA,1 + IFN ALMACT,< EXTERN PRIIN ;COME HERE ON THE CLOCK LEVEL TO BRING THE JOB ASSOCIATED WITH @@ -1006,6 +1018,7 @@ ALMREQ: XWD .+1,1 ANDCAM TAC,DEVIOS(DEVDAT) ;ZAP BIT SO IT WONT BE SWAPPED OUT AGAIN POPJ PDP, + ;HERE WHEN SWAPPER DOES GET THE JOB BACK INTO CORE SWPBAK: MOVE IOS,DEVIOS(DEVDAT) SETM MONB2 ;CLEAR JOB NO, FROM MON BUFFER @@ -1035,7 +1048,6 @@ BACK2: TRZ TAC,10 HLRZ TAC1,IBLK(DEVDAT) ;BLOCK NEEDED DPB TAC1,[POINT 10,BLOCK,35] HRRZ TAC,CLOCK - HRLI TAC1,CPOPJ ;FIND CLOCK-QUEUE REFERENVCE TO BACKC BACK3: CAIN TAC,CIPWTM JRST BACKD ;NOT THERE, TAPE MUST HAVE BEEN STOPPED @@ -1070,6 +1082,7 @@ BACKA: SETOM TAC ;DISCON WILL GO TO -1 EXCH TAC,DISCON ;UNIT TO CONNECT TO JRST BACK2 ;GO RECONNECT + ;IF WE GET HERE THERE IS A SLOW TAPE ON THE SELECTED DRIVE BACKC: CONO PI,PIOFF ;CANT RISK CHANGING THE INTERRUPT ENABLES HRE CONI DTS,TAC ;READ IN ENABLE FLAGS @@ -1096,6 +1109,7 @@ FOUND: MOVEM TAC1,FNDTMP ;SAVE THOSE ACS THAT WILL BE USED FNDPDP: XWD -2,. 0 + IFN CPBIT, < ;HERE WHERE DUMP-MODE POINTER RUNS OUT DMPADV: 0 @@ -1139,6 +1153,7 @@ DTAIN1: TLZE IOS,REWBIT ;NO, FROM A REWIND MTAPE? CONSZ DTS,670000 ;AND NO ERRORS? JRST ERRS ;NO. TOUGH LUCK SKIPGE BLOCK ;BAD BLOCK NUMBER ON TAPE? + JRST DERR ;YES, TURN ON IODERR DTAIN2: TLNE IOS,DMPMOD ;DUMP MODE? JRST DMPTHR ;YES. GO ELSEWHERE TLNN IOS,SINGL @@ -1155,6 +1170,7 @@ DTAIN2: TLNE IOS,DMPMOD ;DUMP MODE? JRST OUTHRU ;YES EXTERN JBTSTS,PJOBN + ;HERE ON END OF AN INPUT BLOCK HRROI TAC1,177 ;MASK OUT 1ST-BLK DATA TRNN IOS,UDSD ;UNLESS IN NON-STD @@ -1171,7 +1187,6 @@ DTAIN2: TLNE IOS,DMPMOD ;DUMP MODE? JRST THRUIN PUSHJ PDP,ADVBFF ;GET NEXT BUFFER JRST THRUIN ;EMPTY BUF NOT AVAILABLE - SKIPLE DISCON ;TAPE TIMED OUT? JRST BACKB ;YES. GO RECONNECT SKIPE BLK ;EXIT IF EOF OR BLOCK TOO LARGE @@ -1181,6 +1196,7 @@ DTAIN2: TLNE IOS,DMPMOD ;DUMP MODE? SKIPG DTREQ ;YES. ANYONE ELSE WANT IT? JRST READBC ;NO. READ NEXT BLOCK + THRUIN: HRRZ TAC,OBLK(DEVDAT) ;TAPE ALSO BEING WRITTEN? JUMPN TAC,THRUTP ;YES. DONT CHANGE REVERSE BIT TLZ IOS,RVERSE ;NO. SET IOS BIT TO CORRECT DIRECTION @@ -1203,6 +1219,7 @@ HUNGTP: JUMPGE IOS,THRUTP ;GIVE UP CONTROL IF NOT DEAD-RECKONING ;WHEN THE TAPE TIMES OUT FNDBLK WILL RESET THE HUNG TIME, AND ;IF IT IS STILL HUNG AT ITS END THE ERROR MESSAGE WILL OCCUR + INTERN FTSWAP EXTERN SHFWAT ;HERE ON END OF BLOCK WHEN THE JOB IS STILL SWAPPED OUT @@ -1240,6 +1257,7 @@ OUTHRU: PUSHJ PDP,ADVBFE ;GET NEXT BUFFER JRST FILBUF ;NO. GO WRITE NEXT BLOCK JRST THRUTP ;YES. GIVE UP TAPE + ;TURN TAPE AROUND AFTER END-ZONE INTERRUPT TURN: CONSZ DTC,500 ;READ BLOCK NUMBERS? JRST DIREOF ;NO. END ZONE WHILE READING DATA @@ -1295,6 +1313,7 @@ SVDMIN: HLRZ BLK,BUF ;NEXT BLOCK NUMBER HRRM BLK,IBLK(DEVDAT) ;SAVE IN DDB JRST CPOPJ1 + IFN CPBIT, < ;HERE WHEN THROUGH DUMP-MODE DIRECTLY TO USER USDMTH: MOVEI TAC1,IBLK(DEVDAT) @@ -1334,7 +1353,9 @@ RDNXT: CAIG BLK,TOPBLK ;BLOCK LEGAL? ;EOF BEFORE ALL DATA IS IN - DUMP MODE DMPEOF: TRO IOS,IODEND ;LIGHT EOF BIT JRST DMPTH2 ;GIVE UP TAPE - SVADER: PUSHJ PDP,DMPTH2 ;GIVE UP CONTROL + + +SVADER: PUSHJ PDP,DMPTH2 ;GIVE UP CONTROL JRST ADRERR ;TYPE ERROR MESSAGE ;COME HERE ON ERROR ERRS: AOS TAC,ERRCNT ;BUMP COUNT @@ -1393,7 +1414,6 @@ ALMSWT: 0 IFN CPBIT, < BLKCNT: 0 SVPNTR: 0 - USPNTR: 0 DIRCTN: 0 >