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17 lines
397 B
Plaintext
17 lines
397 B
Plaintext
: (key)
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( inc then fetch )
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ACIAR> @ 1+ DUP ACIA) @ = IF
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DROP ACIA( @
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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> @ = NOT UNTIL
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ACIAR> !
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ACIAR> @ 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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