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begin implementing stop routine

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Paul Gardner-Stephen committed 2019-04-22 12:09:03 +09:30
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c64/kernal/stop.s
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@@ -1,3 +1,9 @@
; Function defined on pp272-273 of C64 Programmers Reference Guide ; Function defined on pp272-273 of C64 Programmers Reference Guide
stop: stop:
;; Bit 7 of BUCKYSTATUS contains the state of the STOP key
;; (Compute's Mapping the 64, p27)
;; Get it into the carry flag by rotating left
lda BUCKYSTATUS
rol
rts rts