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lptser.mac
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TITLE LPTSER - LINE PRINTER SERVICE ROUTINE FOR MULTIPLE LINE PRINTERS - V10460
SUBTTL T. N. MCMANUS /TNM/CHW/RCC/LSS TS 17 OCT 78
SEARCH F,S
$RELOC
$HIGH
;THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY ONLY BE USED
; OR COPIED IN ACCORDANCE WITH THE TERMS OF SUCH LICENSE.
;
;COPYRIGHT (C) 1973,1974,1975,1976,1977 BY DIGITAL EQUIPMENT CORP., MAYNARD, MASS.
XP VLPTSR,10460 ;DEFINE GLOBAL VERSION NUMBER FOR LOADER MAP
ENTRY LPTSER
LPTSER::
SUBTTL CONI/CONO DEFINITIONS
;LINE PRINTER CONI BITS AND MASKS FOR LP100 AND BA10
CI.VFU==3B1 ;VFU TYPE
VFUPT==0 ;OPTICAL
VFUDA==1 ;DIRECT ACCESS
VFUNO==2 ;NONE
CI.FEN==1B2 ;FEATURES ENABLED
CI.ENV==1B3 ;EVEN PARITY
CI.CTR==7777B17 ;PAGE COUNTER
CI.INT==1B18 ;INTERRUPT IF CI.FEN
CI.NRY==1B19 ;LPT NOT READY
CI.PZR==1B20 ;PAGE COUNTER ZERO
CI.PAR==1B21 ;LPT PARITY ERROR
CI.VFE==1B22 ;VFU ERROR
CI.NLD==1B23 ;VFU LOAD INHIBIT
CI.CHR==3B25 ;CHARACTER SET (BA10 ALSO)
CHR64==0 ;64 CHARACTERS
CHR96==1 ;96 CHARACTERS
CHR128==2 ;128 CHARACTERS
CHRVAR==3 ;VARIABLE (NOT BA10)
CI.LOV==1B26 ;LINE OVERFLOW (646 ONLY)
CI.OFL==1B27 ;OFF-LINE (BA10 ALSO)
CI.BSY==1B28 ;BUSY (BA10 ALSO)
CI.DON==1B29 ;DONE (BA10 ALSO)
CI.PIB==7B32 ;ERROR INTERRUPT CHN (BA10 ALSO)
CI.PIA==7B35 ;DONE INTERRUPT CHN (BA10 ALSO)
;LINE PRINTER CONO BITS AND MASKS FOR LP100 AND BA10
CO.CIN==1B18 ;CLEAR INTERRUPT
CO.FEN==1B20 ;FEATURES ENABLED
CO.CPE==1B21 ;CLEAR PARITY ERROR
CO.SEP==1B22 ;SEND EVEN PARITY
CO.NLD==1B23 ;INHIBIT VFU LOAD
CO.PRI==1B25 ;PRINTER INIT (BA10 ALSO)
CO.LSV==1B26 ;LOAD STANDARD VFU
CO.SPC==1B27 ;NEXT DATAO SETS PAGE COUNTER
CO.SBY==1B28 ;SET BUSY (BA10 ALSO)
CO.SDN==1B29 ;SET DONE (BA10 ALSO)
CO.PIB==7B32 ;ERROR INTERRUPT CHN (BA10 ALSO)
CO.PIA==7B35 ;DONE INTERRUPT CHAN (BA10 ALSO)
;SPECIAL CONI/CONO COMBOS
CI%SKP==CI.INT+CI.LOV+CI.OFL+CI.DON ;CONSO SKIP CHAIN MASK
CI%SKF==CI.INT ;CONSO MASK WHEN LPT IF OFF
CI%SKE==:CI%SKP-CI.DON ;CONSO/Z SKIP IF ERROR
CO%OFF==CO.CIN+CO.FEN+CO.CPE ;CONO TO TURN LPT OFF
CO%ON==CO%OFF+CO.SDN ;CONO TO TURN LPT ON
SUBTTL SYMBOL DEFINITIONS
;DEVICE DEPENDENT BITS IN LH OF DEVIOS
LPTSYN==Z(1B11) ;CRFF AFTER CLOSE HAS BEEN SENT
LPTEND==Z(1B10) ;CLOSE UUO HAS BEEN DONE
LPTRBL==Z(1B9) ;LPT TROUBLE DETECTED AT INTERRUPT LEVEL
LPTOPB==Z(1B8) ;PARTIAL BUFFER ALREADY OUTPUT
;DEVICE DEPENDENT BITS IN RH OF DEVIOS
LPTNFF==100 ;SUPPRESS FREE FORM FEEDS
;LINEPRINTER HARDWARE CHARACTERISTICS (DEVHCW)
HC.LCP==1B0 ;LOWER CASE PRINTER
HC.PGC==1B1 ;LPT HAS A PAGE COUNTER
HC.VFT==7B5 ;VFU TYPE
.HCVTO==0 ; OPTICAL (PAPER TAPE) VFU
.HCVTD==1 ; DIRECT ACCESS VFU (DAVFU)
.HCVTN==2 ; NO VFU (HDW HANDLES LF,FF,CR)
HC.CST==7B8 ;CHARACTER SET TYPE
.HCC64==0 ; 64 CHARACTER SET
.HCC95==1 ; 95 CHARACTER SET
.HCC28==2 ; 128 CHARACTER SET
.HCCVR==3 ; VARIABLE CHARACTER SET
HC.TYP==7B11
.HCTUK==0 ;UNKNOWN
.HCTBX==1 ;BA10
.HCTLC==2 ;LP100
.HCT20==3 ;LP20
HC.CSN==0,,-1 ;CHARACTER SET NAME (3 SIXBIT CHRS)
;BITS RETURNED BY DEVOP. FUNCTION 5
LP.VFE==1B35 ;VFU ERROR
LP.VLE==1B34 ;VFU LOAD ENABLED
SUBTTL LPT ERROR REPORTING
;FIVE WORDS ARE IN EACH LINEPRINTER DDB FOR DAEMON ERROR REPORTING.
;; !=======================================================!
;; LPTDAP: ! AOBJN POINTER TO DAEMON ERROR BLOCK !
;; !=======================================================!
;;
;;
;;
;; !=======================================================!
;; LPTDAE: ! SIXBIT DEVICE NAME !
;; !-------------------------------------------------------!
;; ! CONI WORD AT ERROR !
;; !-------------------------------------------------------!
;; ! LAST DATA WORD SENT TO LPT !
;; !-------------------------------------------------------!
;; !CTR TYPE! RESERVED !
;; !=======================================================!
.LENAM==0 ;DEVICE NAME
.LECNI==1 ;CONI AT ERROR
.LEDAT==2 ;LAST DATA WORD
.LEFLG==3 ;FLAG WORD
LE.CTR==77B5 ;CONTROLLER TYPE
.LECIL==0 ;ILLEGAL
.LECBX==1 ;BA-10
.LECLC==2 ;LP-100
.LESIZ==4 ;SIZE OF THE BLOCK
;LINE PRINTER SERVICE DISPATCH TABLE
JRST LPTONL ;SEE IF LPT IS ON LINE NOW
JRST LPTDVP ;DEVOP. UUO
JRST REGSIZ## ;GET BUFFER SIZE FROM DDB
JRST LPTINI ;INITIALIZE
JRST LPTHNG ;HUNG DEVICE ERROR
LPTDSP::JRST LPTREL ;RELEASE
JRST LPTCLS ;CLOSE
JRST LPTOUT ;OUTPUT
JRST ILLINP## ;INPUT
SUBTTL MONITOR-LOAD DEVICE INITIALIZATION
;LPTINI IS CALLED AT SYSTEM INITIALIZATION TIME FROM
; IOGO IN SYSINI WITH THE DDB ADDRESS IN F
; 1. CLEAR THE SPECIFIED LINE PRINTER
; 2. DEASSIGN BOTH THE ERROR AND DONE INTERRUPT
; CHANNELS FOR THAT LINE PRINTER
; 3. CLEAR THE SKIP CHAIN INTERRUPT MASK FLAGS
; FOR THAT LINE PRINTER
;NOTE: THE LPTINI CODE FORCES IOGO IN SYSINI TO INVOKE
; LPTINI FOR EACH LINE PRINTER ON THE SYSTEM RATHER
; THAN FOR THE NORMAL CASE WHERE IT INVOKES THE
; INITIALIZATION CODE ONCE FOR EACH DISPATCH TABLE.
;
; THEREFORE, THE CORRECT OPERATION OF THE LPTINI CODE
; IS DEPENDANT UPON THE IOGO CODE WHICH SHOULD BE: ;
; PUSHJ P,DINI(P3)
; HRRZM P3,SAVITM
LPTINI: PUSHJ P,LPTREL ;GO THRU RELEASE CODE
MOVSI T1,-.LESIZ ;LOAD LENGTH OF ERROR BLOCK
HRRI T1,LPTDAE##(F) ;MAKE AN AOBJN POINTER
MOVEM T1,LPTDAP##(F) ;AND STORE IT
MOVE T1,DEVNAM(F) ;GET DEVICE NAME
MOVEM T1,LPTDAE##+.LENAM(F) ;SAVE TIME AT INTERRUPT LEVEL
PJRST CPOPJ1## ;SKIP RETURN TO FORCE CALL FOR EACH LPT
SUBTTL OUT/OUTPUT UUO
LPTOUT: TLO S,IO ;NO, INDICATE OUTPUT
PUSHJ P,LPTOFL ;IF TROUBLE, GET IT FIXED
XCT LPTCNI##(F) ;DO A CONI
ANDI U,CI.NLD ;GET STATE OF NO LOAD BIT
IOR U,LPTCH##(F) ;GET CHANNEL ASSIGNMENT FROM DDB
TRO U,CO%ON ;SET LPT "ON"
TRNE S,LPTNFF ;SUPPRESS FORM FEED?
TLZA S,IOBEG ;YES, CLEAR IOBEG AND OUTPUT FIRST BUFFER
TLNN S,IOBEG ;1ST OUTPUT?
JRST LPTGO ;NO, CONTINUE ON NORMALLY
;HERE IF THIS IS THE FIRST OUTPUT AFTER INIT
PUSHJ P,LPTSTI ;SETUP INITIAL BLKO POINTER
CAIA
;HERE TO START THE PRINTER GOING
LPTGO: PUSHJ P,LPTSET ;SET UP BLKO POINTER
PUSHJ P,SETACT## ;SET IOACT, STORE S, SET HNG CNT
HLL U,LPTCH##(F) ;GET SKIP CHAIN MASK FLAGS
CONO PI,PI.OFF ;TURN OFF PI TO PREVENT IMM. INT.
XCT LPTCNO##(F) ;SEND CONDITIONS OUT TO LPT
HLRM U,LPTCON##(F) ;SAVE SKIP CHAIN MASK FLAGS
XCT LPTCSZ##(F) ;FIND OUT IF DEVICE EXISTS
JRST ONPOPJ## ;DEVICE RECEIVED CONO, OK
CONO PI,PI.ON ;REENABLE ALL INTERRUPTS
PUSHJ P,CLRACT## ;DEVICE NON-EXISTANT OR OFF, CLEAR IOACT
PUSHJ P,LPTOF1 ;CLEAR HUNG COUNTER AND PRINT A MESSAGE
JRST LPTOUT ;TRY AGAIN WHEN WE GET BACK
;HERE DURING OUTPUT UUO TO SEE IF DEVICE EXISTS
LPTOFL: PUSHJ P,LPTONL ;SEE IF LPT IS ON-LINE
SKIPA ;IT'S NOT, TELL THE USER
POPJ P, ;IT IS, JUST RETURN
LPTOF1: MOVEM S,DEVIOS(F) ;YES, SAVE S (LPTRBL OFF)
MOVSI T4,DEPADV ;WANT BUFFER LEFT ALONE
IORM T4,DEVADV(F) ;
MOVSI T4,DVOFLN ;MARK LPT OFF LINE
IORM T4,DEVCHR(F)
PUSHJ P,HNGSTP## ;HALT JOB & PRINT REMINDER
MOVSI T4,DEPADV ;LOAD "DONT ADV BUFFERS"
ANDCAM T4,DEVADV(F) ;AND CLEAR IT IN THE DDB
JRST LPTOFL ;BACK HERE ON CONT, TRY AGAIN
SUBTTL CLOSE UUO - RELEASE UUO
;CLOSE UUO - WHEN A CLOSE UUO IS EXECUTED (OR CLOSE COMMAND)
; LPTCLS IS CALLED. LPTCLS RESETS SOME STATUS FLAGS AND
; LIGHTS LPTEND SO THE FINAL CRFF CAN BE SETUP NEXT TIME
; LPTOUT IS CALLED. LPTCLS RETURNS BY BRANCHING TO "OUT"
; SO THE LAST PARTIAL BUFFER IS OUTPUT.
LPTCLS: TLO S,LPTEND ;SET "CLOSE DONE"
TLZ S,LPTOPB+LPTSYN ;CLEAR TROUBLE BITS
MOVEM S,DEVIOS(F) ;STORE S
JRST OUT## ;AND CALL OUT FOR LAST BUFFER
;RELEASE UUO - WHEN A "RESET" IS DONE ON THE LPT, LPTREL IS
; CALLED. THE LINEPRINTER IS "TURNED-OFF" (SEE LPTOFF)
; THE PAGE COUNTER IS TURNED OFF AND THE DDB IS CLEANED UP.
LPTREL: PUSHJ P,LPTTYP ;SETUP LINEPRINTER TYPE
CAIE T2,.LECLC ;AN LP100?
JRST LPTRE1 ;NO, BA10
MOVEI U,CO%OFF+CO.NLD ;TURN OFF THE LPT AND DISABLE LOADING THE VFU
MOVEI T1,CI%SKP-CI.OFL ;CONSO MASK
HRLI T1,CI%SKF ;SKIP ON ERRORS
JRST LPTRE2 ;GO DO THE INITIALIZATION
LPTRE1: MOVEI U,CO.PRI ;ZAP THE PRINTER
MOVEI T1,CI%SKP ;CONSO MASK
HRLI T1,CI%SKE ;SKIP ON ERRORS
LPTRE2: XCT LPTCNO##(F) ;TURN THE LPT OFF
HRLM T1,LPTCH##(F) ;STORE THE CONSO MASK
HLRM T1,LPTDNZ##(F) ;SKIP ON ERRORS
HLRM T1,LPTDNO##(F) ;SKIP ON DONE
HLLZS LPTCON##(F) ;AND TAKE IT OFF CONSO CHAIN
MOVSI T1,DEPADV ;GET "DONT ADV BUFFER" BIT
ANDCAM T1,DEVADV(F) ;TURN IT OFF
TLZ S,LPTOPB ;CLEAR THE TROUBLE BITS
SETOM LPTPAG##(F) ;TURN OFF PAGE COUNTER
PUSHJ P,LPTOFF ;CLEAR ACTIVE I/O
PJRST STOIOS## ;SAVE S AND RETURN
LPTHNG==LPTREL ;HUNG DEVICE IS SAME AS RELEASE
SUBTTL INTERRUPT ENTRY & DATA INTERRUPT ROUTINE
;ENTER HERE ON ALL INTERRUPTS
LPTINT::
IFN FT5UUO,<
XCT LPXSTS##(F) ;STORE CONI STATUS IN DDB
> ;END IFN FT5UUO
XCT LPTDNZ##(F) ;SKIP IF DONE FLAG IS OFF
SKIPL LPTPTR##(F) ;BLKO COUNT TO 0 ON LAST INT?
JRST LPTSVE##(F) ;YES, SAVE AC'S, RETURNS AT LPTNXT
XCT LPTBKO##(F) ;NO, SEND NEXT WORD FOR PRINTING
JRST LPTEX1##(F) ;LAST WORD SENT BUT INT PENDING
JRST LPTEX1##(F) ;GO RESTORE F AND RETURN
;HERE ON RETURN FROM JRST TO LPTSVE(F) WITH ACS SAVED IN CHANNEL
; SAVE AREA. LAST BLKO POINTER RAN OUT. NEED TO ADVANCE
; BUFFER-RING AND SETUP NEXT BLKO POINTER.
LPTNXT::PUSHJ P,IOSET## ;SETUP ACS R AND S
XCT LPTDNO##(F) ;SKIP IF DONE IS UP
JRST LPTERR ;ELSE HANDLE ERROR INTERRUPT
TLZE S,IOBEG ;NO BUFFER ADVANCE ON 1ST OUTPUT
JRST LPTNX1 ;YES, SETUP NEXT BLKO AND RETURN
TLZE S,LPTEND ;CLOSE DONE?
JRST LPTNX2 ;YES, OUTPUT CRFF
TLZN S,LPTSYN ;WAS CRFF JUST OUTPUT?
PUSHJ P,ADVBFE## ;NO, ADVANCE TO NEXT BUFFER
PJRST LPTSTP ;CANT ADVANCE, BUFFER UNAVAIL
PUSHJ P,SETIOD## ;ARRANGE FOR JOB TO RUN AGAIN
LPTNX1: PUSHJ P,LPTSET ;SET UP NEW BLKO POINTER
PJRST STOIOS## ;SAVE S, SET HUNG COUNT, AND JEN
LPTNX2: TLO S,LPTSYN ;REMEMBER CRFF SENT SO DON'T ADVANCE BUFFERS
PUSHJ P,LPTSTI ;SET BLKO POINTER FOR CRFF
JRST STOIOS## ;STORE S AND JEN
SUBTTL ERROR INTERRUPT ROUTINE
LPTERR: XCT LPTCNI##(F) ;DO A CONI TO READ LPT STATUS
TRNE U,CI.PZR ;PAGE-ZERO?
JRST LPTPZR ;YES, HANDLE ZERO PAGE COUNTER
TRNE U,CI.VFE ;VFU ERROR?
JRST LPTVFE ;YES HANDLE VFU ERROR
TRNE U,CI.PAR ;LINE-PRINTER PARITY?
JRST LPTPAR ;YES, HANDLE PARITY ERROR
TRNE U,CI.LOV ;LINE OVERFLOW (PDP6 PRINTER)
JRST LPTLOV ;YES, DO IT
TRNE U,CI.OFL+CI.NRY ;OFF-LINE?
JRST LPTNOL ;YES, HANDLE IT
;HERE IF ON-LINE OR VFU ERROR CLEARED
MOVSI T1,DVOFLN ;OFF-LINE BIT
TDNN T1,DEVCHR(F) ;IS THE LPT OFF-LINE?
JRST LPTRTI ;NO, MUST HAVE BEEN VFU ERROR CLEARING
ANDCAM T1,DEVCHR(F) ;CLEAR OFF-LINE BIT
IFN FTPI,<
PUSHJ P,PSIONL## ;TELL USER LPT IS NOW ON-LINE
>
TDZ U,[-1,,CO.PIA+CO.PIB]
JRST LPTST1 ;CLEAR INTERRUPT AND DISMISS
;HERE ON PAGE-COUNTER ZERO INTERRUPT ON LP100
LPTPZR: MOVE T2,LPTPAG##(F) ;GET THE PAGE COUNTER
MOVEI T1,IOPLE% ;LOAD THE ERROR CODE
PJUMPE T2,LPTIOE ;EMPTY, GIVE I/O ERROR
PUSHJ P,LPTSPC ;ELSE, SET IT
JRST LPTRTI ;CLEAR CONDITION AND RETURN
;HERE ON LINE-PRINTER PARITY ERROR ON LP100
LPTPAR: PUSHJ P,LPTSYR ;DO SYSERR REPORTING
MOVEI T1,IOPAR% ;LOAD PARITY ERROR
PJRST LPTIOE ;GIVE USER ERROR AND RETURN
;HERE ON LINE-PRINTER VFU ERROR ON LP100
LPTVFE: TRNN U,CI.NLD ;LOADING THE VFU?
JRST LPTRTI ;YES, IGNORE VFU ERROR
PUSHJ P,LPTSYR ;TELL SYSERR
PUSHJ P,LPTNOL
MOVEI T1,IOVFE% ;VFU ERROR
JRST LPTIOE ;TELL THE USER ABOUT IT
;HERE TO HANDLE LINE-OVERFLOW INTERRUPT ON PDP6 PRINTER
LPTLOV: MOVN U,[EXP 1000001] ;DECREMENT BLKO POINTER
ADDM U,LPTPTR##(F) ;BACKUP THE POINTER
MOVEI U,[EXP 15B6+12B13] ;LOAD A CRLF
XCT LPTDTO##(F) ;AND PRINT IT
POPJ P, ;RETURN
;HERE WHEN LINE PRINTER IS OFF-LINE
LPTNOL: MOVSI T1,DVOFLN ;MARK LPT OFF-LINE
IORM T1,DEVCHR(F) ;FOR ON-LINE INTERRUPT
TLO S,LPTOPB ;INDICATE TROUBLE NOTICED ON INTERRUPT
PUSHJ P,LPTSTP ;TURN OFF LPT, CLEAR IOACT
JRST DEVERR## ;CAUSE UUOCON TO RETRY ON UUO LEVEL
SUBTTL SETUP NEXT BLKO POINTER
LPTSET: MOVEI T1,@DEVOAD(F) ;GET ABS. ADDR. OF CURRENT BUFFER
MOVN T2,1(T1) ;GET NEGATIVE WORD COUNT
HRL T1,T2 ;COMBINE NEG. WORD COUNT AND ADDR.
TLZE S,LPTOPB ;TROUBLE ON LAST IO?
SKIPL T2,LPTPTR##(F) ;YES PARTIAL BUFFER LEFT?
AOJA T1,LPTS1 ;NO
HRRI T2,-1 ;YES. SET RH(T2) FOR SUB
SUB T2,T1 ;LH(T2)=NO OF WORDS ALREADY OUT
HLRS T2
ADD T1,T2 ;UPDATE POINTER BY NO OF WORDS DONE
ADDI T1,1 ;+1 FOR IOWD TO FORM
LPTS1: MOVEM T1,LPTPTR##(F) ; LPTPTR:= -(WORD COUNT),(BUFF. ADDR. +1)
POPJ P, ; AND RETURN
;HERE TO SETUP BLKO POINTER FOR CRFF ON OPEN AND CLOSE
; SETS BLKO POINTER FOR CRFF UNLESS THE USER HAS REQUESTED
; SUPPRESSION. SETS LPTDAB SINCE NEXT BLKO WILL NOT PROCESS
; "CURRENT" BUFFER.
LPTSTI: SETZM LPTPTR##(F) ;CLEAR THE POINTER
HRROI T1,LPCRFF-1 ;MAKE BLKO POINTER TO CRFF
TRNN S,LPTNFF ;DOES HE WANT THEM?
MOVEM T1,LPTPTR##(F) ;YES, GIVE THEM TO HIM
POPJ P, ;AND RETURN
LPCRFF: BYTE (7) 15,14,0 ;<CR><FF>
SUBTTL DEVOP UUO INTERFACE
;HERE ON DISPATCH FROM UUOCON
; F=DDB
; T1=FUNCTION
LPTDVP: MOVSI T2,-LPTDVL ;GET TABLE LENGTH SETUP AOBJN PTR
LPTDV1: HLRZ T3,LPTDVT(T2) ;GET THE FUNCTION CODE
HRRZ T4,LPTDVT(T2) ;GET THE DISPATCH ADDRESS
CAMN T1,T3 ;DO CODES MATCH?
JRST (T4) ;YES, DISPATCH
AOBJN T2,LPTDV1 ;NO, LOOP
PJRST ECOD2## ;NO MATCH, GIVE AN ERROR
LPTDVT: XWD 1,DVLLV ;LOAD HARDWARE VFU
XWD 2,DVENV ;ENABLE PROGRAM VFU LOAD
XWD 3,DVDEV ;DISABLE PROGRAM VFU LOAD
XWD 1000,DVPC ;READ PAGE COUNTER
XWD 2000,DVPC ;SET PAGE COUNTER
XWD 1004,DVDCS ;READ DEVICE STATUS
LPTDVL==.-LPTDVT ;DISPATCH TABLE LENGTH
;ROUTINE TO LOAD STANDARD HARDWARE VFU
DVLLV: PUSHJ P,LPTSCO ;SETUP FOR CONO
TRO U,CO.LSV ;SET
JRST DVLLV1 ;ENTER COMMON CODE
;DISABLE PROGRAM LOADING OF VFU
DVDEV: PUSHJ P,LPTSCO
TRO U,CO.NLD
JRST DVLLV1
;ENABLE FOR PROGRAM LOADING OF VFU
DVENV: PUSHJ P,LPTSCO
TRZ U,CO.NLD ;SET
DVLLV1: LDB T2,[POINT 2,U,1] ;GET VFU TYPE
CAIE T2,VFUDA
PJRST ECOD5##
XCT LPTCNO##(F) ;OK
PJRST CPOPJ1## ;SKIP RETURN
;HERE TO READ OR SET THE PAGE COUNTER
DVPC: MOVE T3,DEVHCW(F) ;GET CHARACTERISTICS
TLNN T3,(HC.PGC) ;DEVICE HAVE PAGE COUNTER?
PJRST ECOD11## ;NO, ERROR
TRNE T1,1000 ;READ?
JRST DVPC1 ;YES
PUSHJ P,GETWR1## ;NO, SET T1=PAGE ARG
PJRST RTM1## ;ERROR
SETOM LPTPAG##(F) ;ASSUME -1
JUMPE T1,CPOPJ1## ;RETURN
MOVEM T1,LPTPAG##(F) ;STORE NEW PAGE COUNTER WORD
PUSHJ P,LPTSPC ;SET PAGE COUNTER
JRST CPOPJ1##
DVPC1: SKIPGE LPTPAG##(F) ;ATTEMPT TO READ WHEN
PJRST ECOD10## ; NOT SET
XCT LPTCNI##(F) ;GET STATUS
LDB T1,[POINT 12,U,17] ;ISOLATE PAGE COUNTER
ADD T1,LPTPAG##(F) ;ADD IN REMAINING AMOUNT
PJRST STOTC1## ;RETURN WITH PAGE COUNT IN T1
;HERE TO READ LPT STATUS
DVDCS: MOVEI T1,0 ;INITIALIZE
PUSHJ P,LPTONL ;READ STATUS/CHECK OFFLINE
TLO T1,(DV.OFL) ;OFF LINE
TRNE U,CI.VFE ;VFU ERROR?
TRO T1,LP.VFE ;YES
TRNN U,CI.NLD ;CAN PROGRAM LOAD THE VFU?
TRO T1,LP.VLE ;YES
PJRST STOTC1## ;STORE STATUS/GOOD RETURN
SUBTTL VARIOUS UTILITY ROUTINES
;SUBROUTINE TO SET THE HARDWARE PAGE COUNTER
; IF SOFTWARE PAGE COUNTER WORD (SPCW) IS .EQ. 0, JUST RETURN
; ELSE SET HARDWARE PAGE COUNTER TO MAX(SPCW,7777) I IF THE
; SPCW IS NOT-NEGATIVE, DECREMENT IT BY THE AMOUNT SET.
LPTSPC: SKIPN LPTPAG##(F) ;IS THERE ANYTHING TO SET?
POPJ P, ;NO, JUST RETURN
PUSHJ P,LPTSCO ;SETUP FOR CONO
TRO U,CO.SPC ;SET THE FLAG
XCT LPTCNO##(F) ;DO THE CONO
SKIPL U,LPTPAG##(F) ;GET THE SPCW
CAILE U,7777 ;WITHIN RANGE OF HARDWARE?
MOVEI U,7777 ;NO, PUT WITHIN RANGE
XCT LPTDTO##(F) ;SET THE PAGE COUNTER
MOVNS U ;NEGATE THE AC
SKIPL LPTPAG##(F) ;DONT DECREMENT IF NOT SET
ADDM U,LPTPAG##(F) ;DECREMENT THE SPCW
POPJ P, ;AND RETURN
;SUBROUTINE TO SETUP TO DO A CONO
; DOES A CONI, PRESERVES BUSY, DONE, PIA, PIB, FEATURES ENABLE,
; AND VFU-NOLOAD. RETURNS WORD IN U.
LPTSCO: XCT LPTCNI##(F) ;DO THE CONI
TRZ U,-1-CI.BSY-CI.DON-CI.NLD-CI.PIA-CI.PIB
IORI U,CO.FEN ;PRESERVE FEA-EN AND NOLOAD
POPJ P, ;AND RETURN
;SUBROUTINE TO SEE IF THE LPT IS ON LINE
LPTONL: XCT LPTCNI##(F) ;GET THE CONI WORD
TRNE U,CI.NRY ;IS IT OFF-LINE?
POPJ P,
TLNE U,(CI.FEN)
TRNE U,CI.NLD
TRNN U,CI.VFE!CI.OFL
AOS (P) ;SKIP IF NOT "OFF"
POPJ P, ;EITHER OFF-LINE OR OFF
;HERE TO GIVE THE USER AN I/O ERROR AND DISMISS THE INTERRUPT
; ERROR CODE IN T1.
LPTIOE: DPB T1,PDVESE## ;STORE THE ERROR CODE
TRO S,740000 ;SET ALL ERROR FLAGS IN S
;FALL INTO DISMISS ROUTINE
;HERE TO STOP THE LPT AND START THE USER.
LPTSTP: PUSHJ P,LPTSCO ;SETUP TO DO CONO
TLNN U,(CI.FEN) ;DID FEATURES ENABLED SET?
JRST LPTOFF ;NO, OLD LPT
HRLI U,CI%SKP-CI.OFL ;CONSO MASK FOR PRINT WHEN OFF
LPTST1: TRO U,CO%OFF ;SET TO TURN LPT OFF
TRZA U,CI.BSY+CI.DON+CI.NRY+CI.CHR
LPTOFF: MOVEI U,0 ;CONO LPT, 0, NO CONSO MASK
XCT LPTCNO##(F) ;TURN LPT OFF
HLRM U,LPTCON##(F) ;SET CONSO MASK
TRZ S,IOACT ;CLEAR IOACT
PUSHJ P,SETIOD## ;START UP THE USER
PJRST STOIOS## ;STORE S AND RETURN
;HERE TO CLEAR ALL INTERRUPT CONDITIONS AND DISMISS THE INTERRUPT
LPTRTI: PUSHJ P,LPTSCO ;SETUP THE CONO WORD
TRO U,CO%OFF ;CLEAR THE CONDITIONS
XCT LPTCNO##(F) ;DO THE CONO
PJRST STOIOS## ;STORE S AND RETURN
;HERE TO DO DAEMON ERROR REPORTING FOR SYSERR
LPTSYR: XCT LPTCNI##(F) ;GET THE CONI
MOVEM U,LPTDAE##+.LECNI(F) ;SAVE IT
HRRZ T1,LPTPTR##(F) ;GET BLKO POINTER
MOVE T1,(T1) ;GET THE DATA WORD
MOVEM T1,LPTDAE##+.LEDAT(F) ;SAVE IT
MOVEI T1,.ERLPT ;LOAD SYSERR TYPE
HRLI T1,LPTDAP##(F) ;POINTER TO AOBJN POINTER
PJRST DAEERR## ;CALL DAEMON
;HERE TO SETUP HARDWARE CHARACTERISTICS WORD AND DETERMINE CONTROLLER TYPE
LPTTYP: PUSHJ P,LPTSCO ;SETUP UP CONO WORD
XCT LPTCNO##(F) ;DO THE CONO
XCT LPTCNI##(F) ;DO A CONI
SKIPL DEVCHR(F) ;A LOWER CASE PRINTER?
TDZA T1,T1 ;NO, UPPER CASE
MOVSI T1,(HC.LCP) ;YES, NOTE THAT
LDB T2,[POINT 3,U,25] ;GET CHARACTER SET TYPE
DPB T2,[POINT 3,T1,8] ;STORE IN HARDWARE CHARACTERISTICS
LDB T2,[POINT 2,U,1] ;GET VFU TYPE
DPB T2,[POINT 3,T1,5] ;STORE THAT
MOVEI T2,.LECBX ;ASSUME A BA10
TLNN U,(CI.FEN) ;FEATURES ENABLED IS ON IF THIS IS AN LP100
JRST LPTTY1 ;BA10
TLO T1,(HC.PGC) ;LP100 HAS A HARDWARE PAGE COUNTER
MOVEI T2,.LECLC ;INDICATE LP100
LPTTY1: HLLM T1,DEVHCW(F) ;STORE HARDWARE CHARACTERISTICS
DPB T2,[POINT 6,LPTDAE##+.LEFLG(F),5] ;AND CONTROLLER TYPE
POPJ P, ;RETURN
$LIT
END