mirror of
https://github.com/hsoft/collapseos.git
synced 2024-12-31 10:08:05 +11:00
15 lines
440 B
Plaintext
15 lines
440 B
Plaintext
|
: (key)
|
||
|
|
( inc then fetch )
|
||
|
|
[ SIOR> LITN ] C@ 1+ [ SIO_BUFSZ 1- LITN ] AND
|
||
|
|
( As long as R> == W>-1, it means that buffer is empty )
|
||
|
|
BEGIN DUP [ SIOW> LITN ] C@ = NOT UNTIL
|
||
|
|
DUP [ SIO( LITN ] @ + C@ ( ridx c )
|
||
|
|
SWAP [ SIOR> LITN ] C! ( c )
|
||
|
|
;
|
||
|
|
: (emit)
|
||
|
|
( As long at CTL bit 2 is low, we are transmitting. wait )
|
||
|
|
BEGIN [ SIO_ACTL LITN ] PC@ 0x04 AND UNTIL
|
||
|
|
( The way is clear, go! )
|
||
|
|
[ SIO_ADATA LITN ] PC!
|
||
|
|
;
|