X-Git-Url: http://git.sky-visions.com/cgi-bin/gitweb.cgi/retro-software/dec/tops10/v4.5.git/blobdiff_plain/d693caac75dd25e668e43e85c29205bfc8dea06e..e6cdcf9f28fd4956d9c22090b705d9d8396b5cde:/src/dtcsrn.mac diff --git a/src/dtcsrn.mac b/src/dtcsrn.mac index 8d0970e..c665ac5 100644 --- a/src/dtcsrn.mac +++ b/src/dtcsrn.mac @@ -2,11 +2,11 @@ TITLE DTCSRN - NEW FORMAT DECTAPE SERVICE FOR 551 (PDP-6) SUBTTL DTA551 A.WACHS/TW/RCC 01 JUN 69 V012 XP VDTASR,012 ;GLOBAL VERSION NUMBER FOR LOADER STORAGE MAP. + ENTRY DTCSRN ;ENTRY POINT FOR SELECTIVE LOAD BY BUILD DTCSRN: EXTERNAL TPOPJ,TPOPJ1,DTCCHL,DCOUT,DCIN,DCON,DCOFF EXTERNAL STOIOS,STOTAC,SETACT,CLRACT,OUT,DTCSAV,PIOMOD - EXTERNAL DTAVAL,DTREQ,SETIOD,THSDAT,PUNIT,GETDCDT EXTERNAL ADVBFE,ADVBFF,ADRERR,WAIT1,CPOPJ,CPOPJ1,BADDIR EXTERNAL COMCHK,PJOBN,RELEA9,UADCK1,DTTRY @@ -23,6 +23,7 @@ NAMSTR=^D83 ;1ST NAME WORD IN DIRECTORY QUANT=5 ;NUMBER OF BLOCKS CAN READ BEORE GIVING UP DTC SPACE=6 ;NUMBER OF BLOCKS SEPERATING CONTIGUOUS BLKS OF A FILE + ;DDB MAGIC CELLS FSTBLK=13 DLOC=14 @@ -50,9 +51,8 @@ CPBIT=-1 ;CONDITIONAL ASSEMBLY PARAMETER FOR I/O DIRECTLY ;TO USER. IF -1 THE I/O IN DUMP MODE WITH ;BIT 29 ON IN INIT WILL DO IO DIRECTLY TO USER ;WIUTHOUT DIRECT CONSIDERATION OF BLOCK BOUNDRIES - EXTERN JIFSEC - INTERN DTCINT,DTCDDB,DTCINI,DTCDDS + INTERN DTCINT,DTCDDB,DTCINI,DTCDDS DTCDDB: SIXBIT /DTA0/ XWD ^D60*HUNGST,200 @@ -60,18 +60,15 @@ DTCDDB: SIXBIT /DTA0/ EXP DTCDSP XWD 1107,154403 EXP 0,0 - XWD PROG,0 XWD PROG,0 EXP 0,0,0 - EXP DTCDIR EXP 0,0,0,0,0 - - DTCDIR: BLOCK 200 DTCDDS=.-DTCDDB + JRST DTCINI JRST THRUTP ;HUNG DEVICE DTCDSP: JRST UREL @@ -90,6 +87,7 @@ DTCDSP: JRST UREL JRST UTPCLR POPJ PDP, ;MTAPE + ;INITIALIZE DTC DTCINI: CONO DTC,0 CONO DC,0 @@ -160,7 +158,6 @@ 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 @@ -185,7 +182,7 @@ DSER1: PUSHJ PDP,DIRCHK ;ENSURE DIRECTORY IS IN CORE HRRZ TAC,DLOC(DEVDAT) ;LOCAION OF DIRECTORY ADD TAC,[XWD -26,NAMSTR] ;POINT TO START OF NAMES NMLOOK: SKIPN TAC1,@UUO ;GET NAME - JRST TPOPJ ;NULL ARGUMENT - ERROR RETURN + JRST TPOPJ ;NULL ARGUMENT - ERROR RETURN MOVEM TAC1,DEVFIL(DEVDAT) ;STORE FOR RENAME AND SUPERSEDING ; SHARED SEGMENTS CAMN TAC1,(TAC) ;TEST FOR MATCH @@ -263,7 +260,6 @@ 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 @@ -332,12 +328,12 @@ 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 @@ -372,6 +368,7 @@ 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 @@ -397,6 +394,7 @@ 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, @@ -444,7 +442,8 @@ UREL: SETZM FSTBLK(DEVDAT) ;ZERO FSTBLK PUSHJ PDP,GETDT ;WAIT TILL DTC AVAILABLE MOVEI BLK,DIRBLK ;BLOCK NUMBER PUSHJ PDP,WRTBLK ;WRITE UT - PUSHJ PDP,WAIT1 ;WAIT TILL IT HAS BEEN WRITTEN + JRST WAIT1 ;DONT RETURN TO USER TILL DONE + ;GET DEC TAPE CONTROLLER GETDT: PUSHJ PDP,GETDCDT ;GET DATA CONTROL. DECTAPE CONTROL @@ -455,6 +454,7 @@ GETDT: PUSHJ PDP,GETDCDT ;GET DATA CONTROL. DECTAPE CONTROL MOVEM DEVDAT,USEWRD ;SAVE ACS NEEDED ON INTERRUPT LEVEL JRST SETACT ;LIGHT IOACT AND RETURN + ;HERE TO CLOSE A DUMP MODE FILE CLSDMP: TLO IOS,CLSDMP ;SET SWITCHES PUSHJ PDP,GETDT ;GET CONTROL @@ -479,7 +479,6 @@ UIN: TLZ IOS,IO 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 ;READING DIRECTORY - GIVE CORE IMAGE IF IT EXISTS @@ -503,6 +502,7 @@ 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) @@ -532,7 +532,6 @@ UOUT: TLO IOS,IO 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 FILBUF: DTOCHK: TLNE IOS,DMPMOD ;DUMP MODE? @@ -540,6 +539,8 @@ DTOCHK: TLNE IOS,DMPMOD ;DUMP MODE? MOVSI TAC,@DEVOAD(DEVDAT) ;LOCATION OF BUFFER ADD TAC,[XWD 1,BUF];SET TO STORE IN MONITOR BUFFER BLT TAC,BUF+177 ;GO BLT IT + SKIPN BUF ;GIVE UP TAPE IF + JRST THRUTP ;NO BUFFER TO OUTPUT TLZ IOS,NOLINK OUFULL: TRNE IOS,UDSD ;NON-STANDARD? JRST OUTBL2 ;YES, NO FILE-STRUCTURED OPERATIONS @@ -561,6 +562,7 @@ 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 @@ -577,8 +579,7 @@ COR2HM: MOVEI TAC,@DEVOAD(DEVDAT) ;WHERE IT IS TLO IOS,CHNGDR ;REMEMBER TO WRITE IT OUT MOVSI TAC1,DVDIRI ORM TAC1,DEVMOD(DEVDAT) ;DIR. IS NOW IN CORE -FAKADV: TLZE IOS,DMPMOD ;DUMP MODE? - JRST THRUTD ;YES. GIVE UP CONTROL +FAKADV: TLZN IOS,DMPMOD ;DUMP MODE? PUSHJ PDP,ADVBFE ;ADVANCE BUFFERS JFCL TLZ IOS,NOLINK ;DIRECTORY BLOCK IS NOT LINKED @@ -603,6 +604,7 @@ 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 @@ -618,6 +620,7 @@ TOUSER: JUMPE AC2,NOBLK0 ;CANT READ BLK 0 IN NON-STD DUMP MODE MOVEM TAC,DCLOC1 ;IOWD IS EXHAUSTED HRRZM PROG,ADRPRG ;SAVE JUST ADDRESS OF PROG TLO IOS,NOBUF ;INDICATE DIRECTLY TO USER + XCT @1(PDP) ;TURN ON/OFF IO TLNN IOS,IO JRST CPOPJ1 ;READING - CONTINUE POP PDP,TAC ;WRITING - THIS WILL SAVE LOTS OF TIME @@ -673,11 +676,13 @@ 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 @@ -715,7 +720,8 @@ IOGO: IFN CPBIT, < CONO PI,PION POPJ PDP, ;DISMISS INTERRUPT -;HERE FOR AY DATA WORD WITH TAPE IN REVERSE + +;HERE FOR ANY DATA WORD WITH TAPE IN REVERSE RVERS: 0 IOWD: BLKI DTC,PNTR ;READ (WRITE) A WORD JRST RVTHRU ;POINTER RAN OUT @@ -731,6 +737,7 @@ DTATHR: 0 JSR SHUTDN ;SHUT DOWN DATA CONTROL JEN @DTATHR ;DISMISS + SHUTDN: 0 CONSZ DC,10000 ;DATA MISSED? SETOM ERRFLG ;YES. SET SWITCH @@ -757,7 +764,6 @@ FNDBL2: SETZM ERRFLG ;RESET DATA MISSED FLAG MOVEM TEM,DCLOC1 ;FOR FORWARD DATA OPERATIONS CONSZ DTC,20000 ;IS TAPE ALREADY MOVING/ JRST FNDBL4 ;YES - TRO TAC,323200 ;NO, SET READ BLK NOS., START DELAY TLNN IOS,RVERSE ;MOVE TAPE BACKWARDS? TRO TAC,10000 ;YES @@ -770,6 +776,7 @@ FNDBL3: IFN CPBIT, < MOVEM IOS,DEVIOS(DEVDAT) ;RESTORE IOS IN CORE POPJ PDP, ;AND EXIT + ;HERE TO INITIATE READ OF A TAPE THAT IS MOVING ALREADY FNDBL4: CONSZ DTC,10000 ;GOING BACKWARDS? TRO TAC,10000 ;YES @@ -860,13 +867,13 @@ DTCIN2: TLNE IOS,DMPMOD ;DUMP MODE? MOVEM TAC,IBLK(DEVDAT) ;STORE IN DDB TLZE IOS,IOW ;NO. IN IO WAIT? PUSHJ PDP,SETIOD ;YES. TAKE OUT OF WAIT - TLZE IOS,SINGL+RWDIR+DMPCLS ;DIRECTORY OPERATION OR - ;CLOSING DUMP FILE? + TLZE IOS,SINGL+RWDIR ;DIRECTORY OPERATION? JRST THRUTP ;YES. LEAVE TLNE IOS,IO ;WRITING? 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 @@ -883,7 +890,6 @@ DTCIN2: TLNE IOS,DMPMOD ;DUMP MODE? JRST THRUIN ;YES. DONT ADVANCE BUFFERS PUSHJ PDP,ADVBFF ;GET NEXT BUFFER JRST THRUIN ;EMPTY BUF NOT AVAILABLE - SKIPE BLK ;EXIT IF EOF OR BLOCK TOO LARGE CAILE BLK,TOPBLK ;THE ERROR WILL BE CAUGHT ON THE JRST THRUIN ;UUO LEVEL NEXT TIME AROUND @@ -891,6 +897,7 @@ DTCIN2: 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 @@ -917,7 +924,6 @@ THRUTD: PUSHJ PDP,THRUTA ;GIVE UP DATA CONTROL CONO DTC,0 ;SHUT DOWN DATA CONTROL HLLZS DTCINT POPJ PDP, ;AND LEAVE - EXTERN CLOCK ;HERE ON END OF OUTPUT BLOCK @@ -932,6 +938,7 @@ 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 INTERUPT TURN: MOVEM TAC,TEMPA ;SAVE TAC MOVE TAC,UNIT ;UNIT AND CHANNEL @@ -952,6 +959,7 @@ TIMINT: CONSO DTS,20 ;TIME FLAG INTERRUPT ON? HLLZS DTCINT JEN @DTCCHL ;AND LEAVE + ;HERE WITH AN INTERRUPT WHILE SEARCHING FOR BLOCK NUMBERS BLKNUM: CONSZ DTS,2 ;END ZONE INTERRUPT? JRST TURN ;YES. TURN AROUND @@ -966,7 +974,7 @@ SPRIUS: CONI DTC,TEMPA ;READ DTC STATUS BITS TIMREQ: XWD .+1,3 ;E CLOCK TICKS SOSL DTREQ ;ALLOW OTHER JOBS - SETOM DTAVAL ;TO GET DT CONTROL NOW + SETOM DTAVAL ;TO GET DT CONTROL NOW POPJ PDP, ;COME HERE ON END OF DUMP MODE BLOCK SVDMTH: IFN CPBIT, < @@ -1006,6 +1014,7 @@ 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) @@ -1039,6 +1048,7 @@ RDNXT: CAIG BLK,TOPBLK ;BLOCK LEGAL? JRST READBC ;GO READ BLOCK NUMBER TROA IOS,IOBKTL ;LIGHT ERROR BIT + ;EOF BEFORE ALL DATA IS IN - DUMP MODE DMPEOF: TRO IOS,IODEND ;LIGHT EOF BIT JRST DMPTH2 ;GIVE UP TAPE @@ -1061,7 +1071,6 @@ ERRS1: CONSO DTS,4 ;IF ILLEGAL OP - DONT RETRY JRST FNDBL2 ;NO. TRY AGAIN ;PERMANENT ERROR - PERMER: CONSZ DTS,10 TRO IOS,IODTER ;PARITY CONSO DTS,100 @@ -1106,4 +1115,3 @@ DIRCTN: 0 BUF: BLOCK 200 DTAEND: END - \ No newline at end of file