mirror of
https://github.com/hsoft/collapseos.git
synced 2024-11-05 17:40:56 +11:00
37 lines
907 B
Forth
37 lines
907 B
Forth
( 8K of onboard RAM )
|
|
0xc000 CONSTANT RAMSTART
|
|
0xdd00 CONSTANT RS_ADDR
|
|
( Memory register at the end of RAM. Must not overwrite )
|
|
0xddca CONSTANT PS_ADDR
|
|
RAMSTART 0x70 + CONSTANT VDP_MEM
|
|
0xbf CONSTANT VDP_CTLPORT
|
|
0xbe CONSTANT VDP_DATAPORT
|
|
32 CONSTANT VDP_COLS
|
|
24 CONSTANT VDP_ROWS
|
|
RAMSTART 0x72 + CONSTANT PAD_MEM
|
|
0x3f CONSTANT PAD_CTLPORT
|
|
0xdc CONSTANT PAD_D1PORT
|
|
212 LOAD ( z80 assembler )
|
|
: ZFILL, ( u ) 0 DO 0 A, LOOP ;
|
|
262 LOAD ( xcomp )
|
|
524 LOAD ( font compiler )
|
|
270 LOAD ( xcomp overrides )
|
|
|
|
0x100 JPnn, 0x63 ZFILL, ( 0x66 )
|
|
RETN, 0x98 ZFILL, ( 0x100 )
|
|
( All set, carry on! )
|
|
CURRENT @ XCURRENT !
|
|
0x100 BIN( !
|
|
282 LOAD ( boot.z80 )
|
|
393 LOAD ( xcomp core low )
|
|
CREATE ~FNT CPFNT7x7
|
|
623 628 LOADR ( VDP )
|
|
632 637 LOADR ( PAD )
|
|
420 LOAD ( xcomp core high )
|
|
(entry) _
|
|
( Update LATEST )
|
|
PC ORG @ 8 + !
|
|
," VDP$ PAD$ " EOT,
|
|
ORG @ 0x100 - 256 /MOD 2 PC! 2 PC!
|
|
H@ 256 /MOD 2 PC! 2 PC!
|