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Patch the value of IMPUS3 when IP is read from the IMP

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Björn Victor
2023-04-20 20:06:24 +02:00
committed by Lars Brinkhoff
parent 47e0df7898
commit 621201978f
1 changed files with 13 additions and 0 deletions
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13
src/system/imp.368 → src/system/imp.369
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@@ -629,6 +629,19 @@ IMPIN: LDB T,[241000,,IMPILB+0] ;get network byte (ip[0])
MOVE T,NIFIPA ; make network part of address
AND T,NIFIPM
MOVEM T,NIFIPN ; save it
;; Backwards compatibility for RESOLV"OWNHST (used by e.g. COMSAT):
;; patch the IMPUS3 symbol
PUSH P,A ;Save the ACs clobbered by symlk
PUSH P,B
PUSH P,C
MOVE B,[SQUOZE 0,IMPUS3]
PUSHJ P,SYMLK
BUG HALT,[IMPUS3 symbol not found]
MOVE A,NIFIPA
MOVEM A,(C) ;Zap the symbol value
POP P,C
POP P,B
POP P,A
JRST IMPIRT ;One more NOP from IMP
;;; IMP->Host Type 5 - RFNM (Ready For Next Message)