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PDP-10 Archives
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BB-F492Z-DD_1986
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10,7/703anf/dndn11.p11
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.SBTTL DNDN11 - DN11 ROUTINES 09 SEP 80
;THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY ONLY BE USED
; OR COPIED IN ACCORDANCE WITH THE TERMS OF SUCH LICENSE.
;
;COPYRIGHT (C) 1976,1977,1978,1979,1980,1981,1984 BY DIGITAL EQUIPMENT CORP., MAYNARD, MASS.
VRDN11=015 ;FILE EDIT NUMBER
.IF NE FTDN11
; DN11 DATA FIELDS
;
; IN DDB:
;
; DB.DNS DN11 SOFTWARE STATUS BITS
DNDIAL=B7 ;1=MEANS WE ARE DIALING
DNDISP=B0+B1+B2+B3+B4+B5;DISPLACEMENT OF THIS DN11 (0-63)
;
;
; DB.DNT DN11 TIMER AND TIMER CODE BITS
DNTIME=B0+B1+B2+B3+B4+B5 ;TIMER (MAX 63 SECS)
DNCODE=B6+B7 ;TIMER CODE
;
; DN11 PARAMETERS
;
; TIMER VALUES (IN SECONDS)
;
.IIF NDF DN.TDG,DN.TDG=10. ;TIME FOR DIGIT
.IIF NDF DN.TCL,DN.TCL=20. ;TIME FOR END OF CALL
.IIF NDF DN.TDL,DN.TDL=20. ;TIME FOR DLO TO CLEAR
;TIMER CODES. THESE ARE 0,1,2,3 FOR PAUSE,END OF CALL, DIGIT AND DLO WAIT
TMPAUS=0 ;TIME FOR PAUSE (CODE 16)
TMEOC=1 ;TIME FOR END OF CALL
TMDGT=2 ;TIME FOR DIGIT
TMDLO=3 ;TIME FOR DLO TO CLEAR
; DNTAB: 12(10) WORD TABLE OF DN11 DATA
;
; ;1ST WORD IS ADR OF HDW STATUS REGISTER
; ;2ND WORD IS ADR OF DDB ASSOCIATED WITH ACU
DNPTR=4 ;3RD WORD IS POINTER TO LAST DIGIT DIALED
; ;NEXT 18 BYTES ARE DIGITS TO DIAL
; ;FIRST DIGIT IS NULL
; ;LAST IS ALWAYS 17
DNTABL=^D24 ;NUMBER OF BYTES IN A BLOCK
.MACRO X Q
DN'Q'BLK:
.REPT 4
ZZ ;HDW ADR
.WORD 0 ;DDB ADR
.WORD 0 ;POINTER TO NUMBER
.BLKB ^D18 ;NUMBER TO DIAL
ZZ=ZZ+2
.ENDR
.ENDM X
Z=0
ZZ=DNBASE
.REPT DN11N
X \Z
Z=Z+1
.ENDR
.WORD 0
; DEFINE INTERRUPT VECTOR ROUTINES
;
.MACRO X A
DNVA'A': MOV R0,-(P)
MOV #DN'A'BLK,R0 ;ADDRESS OF DN11 BLOCK
.ENDM X
Z=DN11N-1
.REPT DN11N
X \Z
.IIF NE Z, BR DNINT
Z=Z-1
.ENDR ;.REPT DN11N
; DN11 INTERRUPT SERVICE ROUTINE
;
; REGISTER USAGE
;
; R3 DNTAB ENTRY FOR THIS 801 CONTROLLER
; R2 ADDRESS OF HARDWARE STATUS REGISTER
; J POINTER TO TTYDDB FOR THIS LINE
;
DNINT: SAVE <R1,R2,R3,J> ;SAVE REGS
CLR -(P) ;CLEAR COUNT OF CONDITIONS HANDLED
MOV R0,R3 ;POINT TO ITS DNTAB ENTRY
DNLOOP: MOV @R3,R2 ;GET HARDWARE ADDRESS
BEQ 20$ ;IF DOESN'T EXIST TRY NEXT ONE
MOV 2(R3),J ;GET DDB ADDRESS
BIT #DN..IE,@R2 ;IS INTERRUPT ENABLE SET FOR THIS ONE ?
BEQ 20$ ;BECAUSE IF NOT DON'T CARE ABOUT IT
BIT #DN.DNE,@R2 ;SEE IF DONE IS SET FOR THIS ONE
BEQ 20$ ;NO, TRY NEXT
INC (P) ;COUNT IT
JSR PC,DNFUNC ;AND HANDLE IT
20$: ADD #DNTABL,R3 ;POINT TO NEXT DNTAB ENTRY
BIT #6,@R3
BNE DNLOOP ;AND CONTINUE
40$: TST (P)+ ;CHECK COUNTER
BNE 90$ ;SKIP IF NON-ZERO
TWIDDLE ;NO INTERRUPT CONDITION FOUND???
90$: RESTORE <J,R3,R2,R1,R0>
RTI ;DISMISS
;SUBROUTINE TO DETERMINE CAUSE OF INTERRUPT AND DO APPROPRIATE DN FUNCTION
DNFUNC: BIC #DN.DGT!DN.DNE,@R2 ;CLEAR DONE AND DIGIT
BIT #DN.PWI!DN.ACR,@R2 ;POWER LOSS OR 801 TIMEOUT?
BNE DNFAIK ;YES, ABORT CALL FUNCTION
BIT #DN.PND,@R2 ;IS IT TIME TO GIVE NEXT DIGIT
BEQ DNINT9 ;NO, RETURN
MOVB @DNPTR(R3),R0 ;GET LAST DIGIT DIALED
CMP #17,R0 ;WAS IT END OF CALL?
BEQ DNINT9 ;YES, DON'T PRESENT ANOTHER
DNEXTD: INC DNPTR(R3) ;POINT TO NEXT DIGIT
MOVB @DNPTR(R3),R0 ;GET IT
CMP R0,#16 ;SEE IF 5 SEC DELAY
BNE 30$ ;NO,CONTINUE
MOVB #<100*TMPAUS+5>,DB.DNT(J) ;SET TIME
BR DNINT9 ;DONE
30$: CMP R0,#17 ;END OF CALL?
BNE 40$ ;NO, CONTINUE LOOKING
MOVB #<100*TMEOC+DN.TCL>,DB.DNT(J) ;SET END OF CALL TIME
BR DNINT9 ;CHECK FOR SUCCESS
40$: MOVB #<100*TMDGT+DN.TDG>,DB.DNT(J) ;SET DIGIT TIME
MOVB R0,1(R2) ;PUT CHARACTER TO 801
BISB #DN..DP,@R2 ;SET DIGIT PRESENT
DNINT9: BIT #DN.DSS,@R2 ;DID WE WIN ?
BEQ 99$ ;NOT YET
BIC #DN..IE,@R2 ;DON'T NEED INTERRUPT ENABLE
BICB #DNTIME,DB.DNT(J) ;CLEAR END OF CALL TIMER
MOV DB.LCB(J),R0 ;ADDRESS OF LCB
MOVB #LCS.DS,LC.STA(R0) ;SET TO DIAL SUCCEEDED STATE
99$: RTS PC ;RETURN
;HERE ON RECEIPT OF DIAL MESSAGE
DNSTRT: MOV DB.LCB(J),R3 ;POINT TO LCB
MOVB #LCS.DL,LC.STA(R3) ;SET TO DIALING INITIATE
BIS #TS.RNG,DB.DCS(J) ;SET RING AND
BIC #TS.DTR,DB.DCS(J) ;CLEAR DTR TO TELL -10 WE'RE TRYING
JSR PC,QUEXDS ;ENSURE STATUS GETS SENT
BIT #40,DB.DVT(J) ;AUTO-DIAL LINE?
BEQ 94$ ;IF NOT STOP NOW
.IF NE FT.CHK
BIT #LCB.DS,@DB.LCB(J) ;DATASET LINE?
ASSERT NE ;BETTER BE
.ENDC;.IF NE FT.CHK
CMP DB.OCN(J),#16. ;NUMBER OF CHARACTERS GREATER THAN 16?
BGT 94$ ;YES, ERROR
JSR PC,DNADDR ;GET R1=DNTAB,R2=HDW
BIT #DN.PWI,@R2 ;POWER ON & HEALTHY ?
BNE 94$ ;NO GOOD
MOV #6,R3 ;DISPLACEMENT INTO DNTAB
ADD R1,R3 ;OF FIRST DIGIT
MOV R3,4(R1) ;INITIALIZE POINTER
CLRB (R3)+ ;FIRST BYTE IS 0
20$: JSR PC,DVGDBY ;GET NEXT NUMBER
70$: BIC #^C17,R0 ;STRIP EXTRA BITS
MOVB R0,(R3)+ ;STASH
TST DB.OCN(J) ;MORE LEFT ?
BNE 20$ ;IF SO GET IT
MOVB #17,(R3)+ ;TRAILING FLAG
BISB #DNDIAL,DB.DNS(J) ;MARK THIS LINE AS CONTROLLED BY DN11/801
BIT #DN..CR!DN.DLO,@R2 ;CALL REQUEST UP?
BEQ DNBEGN ;IF READY BEGIN AT ONCE
;HERE BECAUSE WANT TO DIAL BUT DN11 STILL IS BUSY
BIC #^CDN..ME,@R2 ;CLEAR CALL REQUEST
MOVB #<100*TMDLO+DN.TDL>,DB.DNT(J) ;SET TIMER
RTS PC ;RETURN
;HERE IF DIAL REQUEST CAN'T BE HONOURED.
93$: JSR PC,DVGDBY ;EAT NEXT BYTE
94$: TST DB.OCN(J) ;MORE LEFT IN MESSAGE?
BGT 93$ ;YES, EAT REST OF MESSAGE
; BR DNFAIL ;NO, TELL -10 WE FAILED
;DN11 CLEAR ROUTINES
DNFAIK:
DNFAIL: MOV DB.LCB(J),R3 ;POINT TO LCB
MOVB #LCS.DF,LC.STA(R3) ;SET TO DIAL FAIL STATE
DNCLR: BITB #DNDIAL,DB.DNS(J) ;THIS LINE CONTROLLED BY US?
BEQ 99$ ;NO
JSR PC,DNADDR ;YES, GET DNTAB AND HDW ADDRESS
BIC #^CDN..ME,@R2 ;CLEAR CALL REQUEST
BICB #DNDIAL,DB.DNS(J) ;LINE NO LONGER UNDER OUR CONTROL
CLRB DB.DNT(J) ;SO WE SHOULDN'T HAVE A TIMER EITHER
99$: RTS PC
;DISPATCH TABLE FROM SECDEV WHEN TIMER IN DB.DNT EXPIRES
DNTDSP: DNTM5S ;5 SECOND DELAY
DNTMEC ;END OF CALL
DNTMDG ;DIGIT
DNTMDL ;DLO CLEAR
;HERE WHEN END OF 5 DIGIT DELAY EXPIRES
DNTM5S: JSR PC,DNADDR ;GET DNTAB ADDR IN R1, HWD IN R2
MOV R1,R3 ;PUT DNTAB IN R3 FOR DNFUNC
PIOFF ;DON'T ALLOW INTERRUPTS
JSR PC,DNFUNC ;PND SHOULD STILL BE ON
PION ;ENABLE INTERRUPTS
RTS PC ;RETURN
;HERE WHEN END OF CALL DELAY EXPIRES
DNTMEC: JSR PC,DNADDR ;GET DNTAB AND HDW ADDRESSES
BR DNFAIL ;CALL FAILED
;HERE WHEN DIGIT TIMER EXPIRES
; ONLY HAPPENS IF DIALER NOT WORKING
DNTMDG: JSR PC,DNADDR ;SETUP R1 &R2 TO POINT TO DNTAB & HDW
BR DNFAIL ;CALL FAILED
;HERE WHEN DLO CLEAR TIMER EXPIRES
DNTMDL: JSR PC,DNADDR ;GET HARDWARE AND DNTAB
BIT #DN.DLO,@R2 ;DATA LINE OCCUPIED STILL ON?
BNE DNFAIL ;YES, MUST BE BROKEN
DNBEGN: MOVB #<100*TMDGT+DN.TDG>,DB.DNT(J) ;START DIGIT TIMER
BIS #DN..CR!DN..IE,@R2 ;SET CALL REQUEST
RTS PC ;EXIT
;SUBROUTINE TO GET DNTAB ADDRESS IN R1, DN STATUS REG ADDRESS IN R2
; DESTROYS R0
DNADDR: MOVB DB.DNS(J),R0 ;DNTAB DISPLACEMENT
BIC #177700,R0 ;CLEAR UNWANTED BITS
ASL R0 ;TIMES 2.
ASL R0 ;TIMES 4.
ASL R0 ;TIMES 8.
MOV R0,R1 ;SAVE FOR LATER
ASL R0 ;TIMES 16.
ADD R0,R1 ;TIMES 24.
ADD #DN0BLK,R1 ;PLUS ADDRESS OF FIRST
MOV @R1,R2 ;GET HARDWARE ADDRESS
RTS PC
.ENDC;.IF NE FTDN11