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collapseos/blk/624

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2020-05-15 12:15:31 +10:00
CODE _blank ( this is way too slow in Forth )
A XORr, VDP_CTLPORT OUTnA,
A 0x40 LDrn, VDP_CTLPORT OUTnA,
HL 0x4000 LDddnn,
BEGIN,
A XORr, VDP_DATAPORT OUTnA,
HL DECss, HLZ,
JRNZ, AGAIN,
;CODE