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collapseos/blk/357
Virgil Dupras a19376df6c Copy ACIA driver to blkfs
We can get rid of acia.z80, but not of acia.fs yet, we still need it.
2020-04-23 12:42:41 -04:00

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0x20 CONSTANT ACIABUFSZ
( Points to ACIA buf )
: ACIA( [ ACIA_MEM 4 + LITN ] ;
( Points to ACIA buf end )
: ACIA) [ ACIA_MEM 6 + LITN ] ;
( Read buf pointer. Pre-inc )
: ACIAR> [ ACIA_MEM LITN ] ;
( Write buf pointer. Post-inc )
: ACIAW> [ ACIA_MEM 2 + LITN ] ;
( This means that if W> == R>, buffer is full.
If R>+1 == W>, buffer is empty. )
358 360 LOADR