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/ vim: set sw=8 noexpandtab :
*000
INTRET, 0
JMP GOTINT
*010
IHEAD, 7777 / because preincrement
ITAIL, 7777
OHEAD, 7777 / because preincrement
OTAIL, 7777
*100
OBUSY, 0
*200
CLA IAC
KIE
ION
LOOP, CLA
TAD ITAIL
CMA IAC
TAD IHEAD
SNA
JMP LOOP
CLA
CDF 0010
TAD I ITAIL
CDF 0020
DCA I OHEAD
CDF 0000
IOF / critical section
TAD OBUSY
SNA
TFL
ION
JMP LOOP / end critical section
*400
GOTINT, DCA SAVEA
GTF
AND (7577)
DCA SAVEF
TSF
JMP KBIN
TCF
CLA
DCA OBUSY
TAD OTAIL
CMA IAC
TAD OHEAD
SNA
JMP KBIN
CLA
CDF 0020
TAD I OTAIL
CDF 0000
TPC
CLA IAC
DCA OBUSY
KBIN, KSF
JMP RETINT
KRB
CDF 0010
DCA I IHEAD
CDF 0000
RETINT, CLA
TAD SAVEF
RTF
CLA
TAD SAVEA
ION
JMP I INTRET
SAVEA, 0
SAVEF, 0
|
