mirror of https://github.com/hsoft/collapseos.git
17 lines
451 B
Plaintext
17 lines
451 B
Plaintext
: (key)
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( inc then fetch )
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[ ACIAR> LITN ] @ 1+ DUP [ ACIA) LITN ] @ = IF
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DROP [ ACIA( LITN ] @
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THEN
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( As long as R> == W>-1, it means that buffer is empty )
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BEGIN DUP [ ACIAW> LITN ] @ = NOT UNTIL
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[ ACIAR> LITN ] !
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[ ACIAR> LITN ] @ C@
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;
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: (emit)
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( As long at CTL bit 1 is low, we are transmitting. wait )
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BEGIN [ ACIA_CTL LITN ] PC@ 0x02 AND UNTIL
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( The way is clear, go! )
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[ ACIA_IO LITN ] PC!
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;
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