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PDP-10 Archives
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BB-D868D-BM
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4-sources/helper.mac
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TITLE .HELPR SUBROUTINE TO OUTPUT SYS:??????.HLP %5(41)
SUBTTL A.W.LYONS/AWL/PFC 17-OCT-73
;***COPYRIGHT 1971,1972,1973 DIGITAL EQUIPMENT CORP., MAYNARD,MASS.***
CUSTVR==0 ;CUSTOMER VERSION
DECVER==5 ;DEC VERSION
DECMVR==0 ;DEC MINOR VERSION
DECEVR==41 ;DEC EDIT NUMBER
XP %HELPR,CUSTVR*1B2+DECVER*1B11+DECMVR*1B17+DECEVR
PURGE CUSTVR,DECVER,DECMVR,DECEVR
;ASSEMBLY INSTRUCTIONS:
IFNDEF %%C,<PRINTX ? .COMPILE C+HELPER
PASS2
END>
;THEN LOAD THE .REL FILE WITH ANY PROGRAM
;REVISION HISTORY
;%4(35) JAN 1972
;36 (10-9713) HANDLE SEQUENCED FILES AND I/O ERRORS
;37 (10-11567) HANDLE HLP:
;40 ADD ALTERNATE ENTRY 'HELPER' FOR FORTRAN/COBOL
;41 EXPAND SORRY MESSAGE
;HELPER IS A SUBROUTINE USED TO OUTPUT HELP TEXTS(HLP:/SYS:??????.HLP)
; ONTO DEVICE TTY. IT WAS DESIGNED AS A TOOL FOR THE VARIOUS
; MODULES OF THE MULTI-PROGRAMMING-BATCH PROJECT.
;
;ENTERED WITH THE SIXBIT MODULE NAME IN AC1 VIA:
; PUSHJ P,.HELPR
; RETURN TO HERE AT END OF HELPER
;
;OR MOVEI 16,[,,['MODULE']]
; PUSHJ 17,HELPER
;
;HELPER REQUIRES EIGHT(8) LOCATIONS ON THE PUSH-DOWN LIST
; ON WHICH TO STORE AND FROM WHICH TO RESTORE USER AC'S.
;ACCUMULATORS
T1=1
T2=2
T3=3
T4=4
AP=16 ;ARG LIST POINTER
P=17
;DEVICE CHANNELS
DSK=0
ENTRY .HELPR,HELPER
TWOSEG
RELOC 400000
HELPER: MOVE T1,@(AP) ;FETCH FIRST ARG
.HELPR: PUSH P,T2 ;SAVE ACS THAT ARE USED
PUSH P,T3
PUSH P,T4
PUSH P,.JBFF ;SAVE .JBFF
MOVE T2,.JBREL ;GET ACTUAL CORE SIZE
HRLM T2,(P) ;SAVE FOR RESTORATION
SETZ T2, ;TO LOAD BUFFER HEADER INTO PDL
PUSH P,T2 ; LOAD UP 4 ZEROED LOCATIONS
PUSH P,T2
PUSH P,T2
PUSH P,T2
GETHLP: SKIPA T3,['HLP '] ;GET HLP:
GETSYS: MOVSI T3,'SYS'
HRRZI T4,-2(P)
OPEN DSK,T2
JRST SORRY
MOVSI T2,'HLP'
SETZB T3,T4
LOOKUP DSK,T1
TLZA T2,-1 ;CLEAR JUNK
JRST MORE ;GOOD--GO READ FILE
CAIE T2,ERSNF%
CAIN T2,ERSLE%
JRST AGAIN
CAILE T2,ERIPP%
JRST SORRY ;HORRIBLE DISK ERROR
AGAIN: SETZM T2 ;CLEAR PHYSICAL BIT
AOS T3,-3(P) ;TRY NEXT CASE
TRNE T3,1 ;SEE IF ODD
TXO T2,UU.PHS ;YES--TRY PHYSICAL ONLY
JRST @[GETHLP ;TRY HLP: AGAIN
GETSYS ;THEN LOGICAL SYS:
GETSYS ;THEN PHYSICAL SYS:
SORRY]-1(T3) ;THEN GIVE UP
MORE: IN DSK,
JRST GETCHR
STATZ DSK,IO.ERR ;SEE IF ERRORS
JRST IOERR ;YES--ISSUE MESSAGE
STATZ DSK,IO.EOF ; YET?
JRST DONE ;YES, ALL DONE!
GETCHR: SOSGE T2,(P)
JRST MORE
IBP -1(P) ;INCR CHAR POINTER
MOVE T1,@-1(P) ;GET THIS WORD
TRNE T1,1 ;SEE IF SEQUENCE NUMBER
JRST [AOS -1(P) ;YES--SKIP 5 MORE CHARS
MOVNI T1,5 ; ..
ADDM T1,(P) ; ..
JRST GETCHR]
LDB T1,-1(P)
OUTCHR T1
JRST GETCHR
IOERR: OUTSTR [ASCIZ \%HLRIOE I/O error reading help file\]
JRST SORRYX ;FINISH WITH SORRY MESSAGE [41]
SORRY: OUTSTR [ASCIZ /%HLRNHF No .HLP file on SYS:/]
SORRYX: OUTSTR [ASCIZ/; I'm sorry, I can't help you/]
DONE: OUTSTR [ASCIZ/
/]
RELEAS DSK,
SUB P,[4,,4] ;RESTORE PDL
POP P,T1 ;RETRIEVE .JBFF IN "T1"
HRRZM T1,.JBFF ;RESTORE .JBFF
HLRZ T1,T1 ;RETRIEVE .JBCOR
CORE T1,
JFCL ;IGNORE ERROR
POP P,T4
POP P,T3
POP P,T2
POPJ P, ;RETURN TO CALLER
XLIST ;LITERALS
LIT
LIST
RELOC
END