collapseos/emul/xcomp.fs
Virgil Dupras 02e6979a46 emul: implement AT-XY
VI, here we come!
2020-05-23 20:15:28 -04:00

39 lines
672 B
Forth

0xe800 CONSTANT RAMSTART
0xff00 CONSTANT RS_ADDR
0xfffa CONSTANT PS_ADDR
212 LOAD ( z80 assembler )
262 LOAD ( xcomp )
270 LOAD ( xcomp overrides )
282 LOAD ( boot.z80 )
353 LOAD ( xcomp core low )
: (emit) 0 PC! ;
: (key) 0 PC@ ;
: EFS@
256 /MOD 3 PC! 3 PC!
1024 0 DO
4 PC@
BLK( I + C!
LOOP
;
: EFS!
256 /MOD 3 PC! 3 PC!
1024 0 DO
BLK( I + C@ 4 PC!
LOOP
;
: COLS 80 ; : LINES 32 ;
: AT-XY 6 PC! ( y ) 5 PC! ( x ) ;
380 LOAD ( xcomp core high )
(entry) _
( Update LATEST )
PC ORG @ 8 + !
," CURRENT @ HERE ! "
," BLK$ "
," ' EFS@ BLK@* ! "
," ' EFS! BLK!* ! "
EOT,
ORG @ 256 /MOD 2 PC! 2 PC!
H@ 256 /MOD 2 PC! 2 PC!