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Trailing-Edge - PDP-10 Archives - BB-M080H-SM - monitor-sources/ptr.mac
There are 42 other files named ptr.mac in the archive. Click here to see a list.
;<4.MONITOR>PTR.MAC.2,  6-Mar-79 09:40:10, EDIT BY KONEN
;UPDATE COPYRIGHT FOR RELEASE 4
;<OUYANG>PTR.MAC.3, 30-Nov-77 17:06:11, Edit by OUYANG
;<HELLIWELL.1065>PTR.MAC.6,  5-Sep-77 15:52:18, EDIT BY HELLIWELL
;<HELLIWELL.1065>PTR.MAC.5,  5-Sep-77 15:43:14, EDIT BY HELLIWELL
;<HELLIWELL.1065>PTR.MAC.4,  5-Sep-77 01:29:59, EDIT BY HELLIWELL
;<HELLIWELL.1065>PTR.MAC.3, 21-Aug-77 12:45:02, EDIT BY HELLIWELL
;<HELLIWELL.1065>PTR.MAC.2, 21-Aug-77 12:33:46, EDIT BY HELLIWELL
;REL 3 CHANGES

;COPYRIGHT (C) 1976,1977,1978,1979 BY DIGITAL EQUIPMENT CORPORATION, MAYNARD, MASS.

	SEARCH PROLOG
	TTITLE (PTR,,< - PAPER TAPE READER SERVICE, R. HELLIWELL>)

;LOCAL STORAGE DECLARED IN STG.MAC

EXTN <PTRCHR>
EXTN <PTRBFZ,PTRBF1,PTRBF2,PTRSTS,PTRLCK,PTRCNT,PTRITC>
EXTN <PTRCHC,PTRPTR,PTRSIO>

;SPECIAL AC DEFINITIONS USED HEREIN

DEFAC (IOS,Q2)			;DEVICE STATUS
DEFAC (STS,P1)			;SEE GTJFN FOR FUNCTIONS
DEFAC (JFN,P2)

INTERN	PTRSV,PTRRST

; Parameters

PTR=104				; Ptr device code
PTRDON==10			; Done coni/o bit
PTRBSY==20			; Busy coni/o bit
PTRBIN==40			; Binary mode coni/o bit
PTREOT==400			; End of tape coni bit

DEFINE PTRPIF <
	NOSKED
	CHNOFF PTRCHN>

DEFINE PTRPIN <
	CHNON PTRCHN
	OKSKED>

; Flags in ptrsts and ios

FLG(ALTP,L,IOS,400000)		; Buffer 2 for prog
FLG(ALTI,L,IOS,200000)		; Buffer 2 for int
FLG(OPN,L,IOS,040000)		; Ptr is open
FLG(IMAGE,L,IOS,020000)		; Ptr operating in image mode (10)
FLG(PTRBI,L,IOS,010000)		; Ptr operating in binary mode (14)
FLG(PTRIB,L,IOS,004000)		; Ptr operation in image binary mode (13)
FLG(STOP,L,IOS,002000)		; Don't do datai next int
FLG(FIRST,L,IOS,001000)		; First word of binary block
FLG(EOTF,L,IOS,000400)		; End of tape seen -- eof
FLG(BUFEMP,L,IOS,000200)	; BUFFER ALREADY GIVEN TO I-LEVEL
; Initialize ptr
; Call:	CALL PTRINI
; Returns
;	+1	; Always (used at system initialization time)
	RESCD

PTRINI::CONO PTR,0
	SETZM PTRSTS
	SETOM PTRLCK
	SETOM PTRCNT
	RET

PTRRST:	SKIPL PTRCNT
	CONO PTR,PTRDON+PTRCHN
	RET

	SWAPCD

; Ptr dispatch table

PTRDTB::DTBBAD(DESX9)		; Set directory
	DTBBAD(DESX9)		; Name lookup
	DTBBAD(DESX9)		; Extension lookup
	DTBBAD(DESX9)		; Version lookup
	DTBBAD(DESX9)		; Protection insertion
	DTBBAD(DESX9)		; Account insertion
	DTBBAD(DESX9)		; Status insertion
	DTBDSP(PTROPN)		; Open
	DTBDSP(PTRSQI)		; Input
	DTBBAD(DESX9)		; Output
	DTBDSP(PTRCLZ)		; Close
	DTBBAD(DESX9)		; Rename
	DTBBAD(DESX9)		; Delete
	DTBBAD(DUMPX6)		;DUMPI
	DTBBAD(DUMPX6)		;DUMPO
	DTBBAD(DESX9)		; Mount
	DTBBAD(DESX9)		; Dismount
	DTBBAD(DESX9)		; Init directory
	DTBBAD(MTOX1)		; MTOPR
	DTBBAD(DESX9)		; Get status
	DTBBAD(DESX9)		; Set status
	DTBDSP(RSKP)		; RECORD OUT
	DTBDSP(RFTADN)		; READ TAD
	DTBDSP(SFTADN)		; SET TAD
	DTBDSP (BIOINP)		;SET JFN FOR INPUT
	DTBDSP (BIOOUT)		;SET JFN FOR OUTPUT
	DTBBAD (GJFX49)		;CHECK ATTRIBUTE

	DTBLEN==:.-PTRDTB	;GLOBAL LENGTH OF DISPATCH TABLE
; Open ptr
; Call:	JFN	; The job file number
;	CALL PTROPN
; Return
;	+1	; Error, error number in 1
;	+2	; Success

PTROPN:	LOCK PTRLCK,<CALL LCKTST> ; Lock up this routine
	MOVE IOS,PTRSTS
	TQNE <READF>		;MUST WANT READ,
	TQNE <WRTF>		; BUT NOT WRITE
	JRST [	UNLOCK PTRLCK	;OTHERWISE LOSE
		MOVEI A,OPNX13	;PTR DOESN'T OPEN THAT WAY
		RETBAD()]
	CONSO PTR,PTREOT	; Any tape in reader?
	 JRST [	UNLOCK PTRLCK	; No, fail
		MOVEI A,OPNX8
		RET]
	TQOE <OPN>		; Set open bit, already open?
	 JRST [	UNLOCK PTRLCK	; Yes, give busy error
		MOVEI A,OPNX9
		RET]
	TXZ IOS,ALTP!ALTI!IMAGE!PTRIB!PTRBI!STOP!FIRST
	TXO IOS,BUFEMP
	LDB A,[POINT 4,STS,35]	; Get mode
	JUMPE A,[LDB A,PBYTSZ	; Mode 0, default format by byte size
		CAIN A,8
		TQO <IMAGE>
		CAIN A,^D36
		TQO <PTRBI,FIRST>
		JRST PTROP1]
	CAIN A,14		; Binary?
	TQO <PTRBI,FIRST>	; Yes, set binary and first flags
	CAIN A,13		; Image binary?
	TQO <PTRIB>		; Yes, set image binary flag
	CAIN A,10		; Image?
	TQO <IMAGE>		; Yes, set image flag
	;..
PTROP1:	MOVEI A,7		; Store 7 bit bytes
	TQNE <IMAGE>		; Unless image mode,
	MOVEI A,8		; Then store 8 bit bytes
	TQNE <PTRBI,PTRIB>	; Unless binary or image binary
	MOVEI A,44		; Then 36 bit bytes
	IORI A,4400
	DPB A,[POINT 12,PTRPTR,11]
	MOVEM IOS,PTRSTS
	SETOM PTRCNT		; Zero full buffers
	MOVEI A,5*<PTRBFZ-1>	; Character count
	TQNE <IMAGE>
	MOVEI A,4*<PTRBFZ-1>	; Unless image mode
	TQNE <PTRBI,PTRIB>
	MOVEI A,PTRBFZ-1	; Unless binary mode
	MOVEM A,PTRITC
	MOVEI A,PTRBF1
	TQNN <PTRBI>
	MOVEI A,PTRBF1+1
	HRRM A,PTRPTR
	SETZM PTRCHC
	SETZM PTRBF1		;ZERO THE BUFFERS
	MOVE A,[XWD PTRBF1,PTRBF1+1] ;SETUP BLT WORD
	BLT A,PTRBF1+PTRBFZ-1	;DO IT
	SETZM PTRBF2		;
	MOVE A,[XWD PTRBF2,PTRBF2+1]
	BLT A,PTRBF2+PTRBFZ-1	;DO IT AGAIN
	MOVEI A,PTRCHN
	TQNE <PTRBI,PTRIB>
	MOVEI A,PTRBIN(A)
	CONO PTR,PTRBSY(A)	; Set busy and let it go
	UNLOCK PTRLCK
	SETZM FILLEN(JFN)
	SETZM FILCNT(JFN)
	RETSKP
; Ptr close
; Call:	JFN	; Jfn
;	CALL PTRCLZ

PTRCLZ:	CALL PTRINI
	RETSKP

; Ptr sequential input
; Call:	JFN	; Jfn
;	CALL PTRSQI
; Returns
;	+1	; Always, byte in a, sets eof if no more input

PTRSQI:	MOVE IOS,PTRSTS
	SKIPE FILCNT(JFN)	;SPACE IN BUFFER?
	JRST PTRSQ1		;YES, USE IT
	CALL BUFDMP		;NO, DUMP BUFFER
	SKIPGE PTRCNT		;IS THERE ANOTHER BUFFER FOR US YES?
	JRST PTRWAT		;NO
	MOVX IOS,BUFEMP
	ANDCAB IOS,PTRSTS	;BUFFER NEEDS EMPTYING
	MOVEI A,PTRBF1
	TQNE <ALTP>
	MOVEI A,PTRBF2
	HRRZ B,(A)		; Get count
	JUMPE B,PTRSQI		; Empty buffer, ignore it
	PUSH P,B		; Save
	HRRM A,FILBYT(JFN)	; Point byte pointer to the buffer
	MOVEI C,0
	DPB C,PBYTPO
	MOVEI C,5		; Number of bytes per word in ascii
	TQNE <IMAGE>
	MOVEI C,4		; In image
	TQNE <PTRBI,PTRIB>
	MOVEI C,1
	LDB B,PBYTSZ		; Users byte size
	MOVEI A,^D36
	IDIV A,B		; Bytes per word for user
	POP P,B
	IMUL A,B
	IDIV A,C
	MOVEM A,FILCNT(JFN)
	ADDM A,FILLEN(JFN)
PTRSQ1:	TQNE <EOFF>
	RET
	ILDB A,FILBYT(JFN)	;YES, STORE THE CHARACTER
	SOSLE FILCNT(JFN)	;FINISH BUFFER?
	RET			;NO, THEN RETURN
BUFDMP:	TXNE IOS,BUFEMP		; BUFFER ALREADY DUMPED?
	RET			; YES, LEAVE
	SOSN PTRCNT		;GIVE BUFFER TO I-LEVEL
	CALL PTRSTR		;START IF NECESSARY
	MOVX IOS,ALTP		;SWITCH BUFFERS
	XORB IOS,PTRSTS
	MOVX IOS,BUFEMP
	IORB IOS,PTRSTS
	RET

PTRWAT:	TQNE <EOTF>		;END OF TAPE?
	JRST [	TQO <EOFF>	;YES, THERE WILL BE NO MORE BUFFERS
		RET]
	MOVE A,[XWD PTRCNT,DISGET] ;SET UP TO BLOCK
	TQO <BLKF>		;MARK THAT A BLOCK IS TO BE DONE
	RET			;LET BOUT ROUTINE BLOCK AFTER UNLOCKING


	RESCD

PTRSTR:	PUSH P,A
	TQNN <PTRIB,PTRBI>
	TDZA A,A
	MOVEI A,PTRBIN
	PTRPIF			; PREVENT PTR INTERRUPTS
	MOVE IOS,PTRSTS		; SO THAT STATE DOESN'T CHANGE
	TXZN IOS,STOP		; STOPPING?
	 CONO PTR,PTRDON!PTRCHN(A)	; NO--STOPPED. RESTART
	MOVEM IOS,PTRSTS	; NEW STATE
	PTRPIN
	POP P,A
	RET
; Ptr interrupt service routine

PTRSV:	CONSZ PTR,7
	CONSO PTR,PTRDON
	RET
	MOVEM IOS,PTRSIO	; Save ios
	MOVE IOS,PTRSTS
	TQZE <STOP>
	JRST [	CONO PTR,0
		JRST PTRXIT]
	CONSO PTR,PTREOT
	JRST PTROFF		; End of tape
	DATAI PTR,A		; Read the character
	TQZE <FIRST>
	JRST [	HRRZI B,(A)	; Get word conut
		CAILE B,PTRBFZ-1 ; Too big?
		HRRI A,PTRBFZ-1	; Make it max
		MOVEI B,1(A)
		MOVEM B,PTRITC
		JRST .+1]
	TXNN IOS,IMAGE!PTRBI!PTRIB
	JRST [	ANDI A,177	; Ascii
		JUMPE A,PTRXIT
		CAIN A,177
		JRST PTRXIT
		JRST .+1]
	IDPB A,PTRPTR
	AOS B,PTRCHC
	SOSLE PTRITC
	JRST PTRXIT
PTRIN:	MOVEI A,PTRBF1
	TQCE <ALTI>
	MOVEI A,PTRBF2
	TQZN <FIRST>
	TQNN <PTRBI>
	HRRZM B,(A)
	MOVEI A,PTRBF1
	TQNE <ALTI>
	MOVEI A,PTRBF2
	SETZM PTRCHC
	TQNN <PTRBI>
	AOS A
	HRRM A,PTRPTR
	MOVEI A,44
	DPB A,[POINT 6,PTRPTR,5]
	MOVEI A,5*<PTRBFZ-1>
	TQNE <IMAGE>
	MOVEI A,4*<PTRBFZ-1>
	TQNE <PTRIB,PTRBI>
	MOVEI A,PTRBFZ-1
	MOVEM A,PTRITC
	TQNE <PTRBI>
	TQO <FIRST>
	AOSLE PTRCNT
	TQO <STOP>
PTRXIT:	MOVEM IOS,PTRSTS
	MOVE IOS,PTRSIO
	JRST PTRCHR

PTROFF:	MOVE B,PTRCHC
	TQO <EOTF>
	CONO PTR,0
	JRST PTRIN

	TNXEND
	END