mirror of
https://github.com/hsoft/collapseos.git
synced 2024-12-27 03:08:07 +11:00
80d1b59050
Splitting a word into MSB/LSB pairs happens often and is worth, I think, native words. Also, I'm going to need it in the upcoming commits.
44 lines
1.1 KiB
Forth
44 lines
1.1 KiB
Forth
0xff00 CONSTANT RS_ADDR 0xfffa CONSTANT PS_ADDR
|
|
RS_ADDR 0x80 - CONSTANT SYSVARS
|
|
0 CONSTANT HERESTART
|
|
5 LOAD ( z80 assembler )
|
|
262 LOAD ( xcomp )
|
|
282 LOAD ( boot.z80.decl )
|
|
270 LOAD ( xcomp overrides )
|
|
283 335 LOADR ( boot.z80 )
|
|
353 LOAD ( xcomp core low )
|
|
CODE (emit)
|
|
A 1 LDri, 1 OUTiA, HL POP, A L LDrr, 0 OUTiA,
|
|
;CODE
|
|
CODE (key)
|
|
BEGIN, 1 INAi, A INCr, JRZ, AGAIN,
|
|
A DECr, PUSHA,
|
|
;CODE
|
|
: _sel ( sec )
|
|
( 32 sectors per track, 512 tracks per disk )
|
|
32 /MOD ( addr sec trk )
|
|
0x0a ( seltrk ) 1 PC! 0 PC! 0 0 PC! ( addr sec )
|
|
0x0b ( selsec ) 1 PC! 0 PC! ( addr ) ;
|
|
: _ ( addr )
|
|
( get 512 bytes )
|
|
0x86 ( readsec ) 1 PC!
|
|
512 0 DO 0 PC@ SWAP C!+ LOOP DROP
|
|
;
|
|
: FD@ 2 * DUP _sel BLK( _ 1+ _sel BLK( 512 + _ ;
|
|
: _ ( addr )
|
|
( write 512 bytes )
|
|
0x0c ( writesec ) 1 PC!
|
|
512 0 DO C@+ 0 PC! LOOP DROP
|
|
;
|
|
: FD! 2 * DUP _sel BLK( _ 1+ _sel BLK( 512 + _ ;
|
|
: FD$ ( select disk 0 )
|
|
0x09 ( seldisk ) 1 PC! 0 0 PC! ( sel disk 0 )
|
|
;
|
|
390 LOAD ( xcomp core high )
|
|
(entry) _
|
|
( Update LATEST )
|
|
PC ORG @ 8 + !
|
|
," BLK$ FD$ ' FD@ BLK@* ! ' FD! BLK!* ! " EOT,
|
|
ORG @ |M 2 PC! 2 PC!
|
|
H@ |M 2 PC! 2 PC!
|