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begin implementing IEC serial protocol.

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Paul Gardner-Stephen committed 2019-05-01 21:40:32 +09:30
1 parent 27b33c2b26
commit 16dcfbe22b
12 files changed
+165 -1
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c64/kernal/iec_wait20us.s
+7
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iec_wait20us:
;; Wait 20usec
;; JSR + RTS already costs 12, so need only 8 more
ldx $dd00
ldx $dd00
rts