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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
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commit 16dcfbe22b
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c64/kernal/iec_wait60us.s
+9
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iec_wait60us:
;; Waste ~60 clock cycles (including JSR + RTS)
ldx #$06
* lda $dd00
dex
bpl -
rts