mirror of https://github.com/hsoft/collapseos.git
44 lines
1.1 KiB
Forth
44 lines
1.1 KiB
Forth
0xff00 CONSTANT RS_ADDR 0xfffa CONSTANT PS_ADDR
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RS_ADDR 0x80 - CONSTANT SYSVARS
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0 CONSTANT HERESTART
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5 LOAD ( z80 assembler )
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262 LOAD ( xcomp )
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282 LOAD ( boot.z80.decl )
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270 LOAD ( xcomp overrides )
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283 335 LOADR ( boot.z80 )
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353 LOAD ( xcomp core low )
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CODE (emit)
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A 1 LDri, 1 OUTiA, HL POP, A L LDrr, 0 OUTiA,
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;CODE
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CODE (key)
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BEGIN, 1 INAi, A INCr, JRZ, AGAIN,
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A DECr, PUSHA,
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;CODE
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: _sel ( sec )
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( 32 sectors per track, 512 tracks per disk )
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32 /MOD ( addr sec trk )
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0x0a ( seltrk ) 1 PC! 0 PC! 0 0 PC! ( addr sec )
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0x0b ( selsec ) 1 PC! 0 PC! ( addr ) ;
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: _ ( addr )
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( get 512 bytes )
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0x86 ( readsec ) 1 PC!
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512 0 DO 0 PC@ SWAP C!+ LOOP DROP
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;
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: FD@ 2 * DUP _sel BLK( _ 1+ _sel BLK( 512 + _ ;
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: _ ( addr )
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( write 512 bytes )
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0x0c ( writesec ) 1 PC!
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512 0 DO C@+ 0 PC! LOOP DROP
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;
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: FD! 2 * DUP _sel BLK( _ 1+ _sel BLK( 512 + _ ;
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: FD$ ( select disk 0 )
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0x09 ( seldisk ) 1 PC! 0 0 PC! ( sel disk 0 )
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;
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390 LOAD ( xcomp core high )
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(entry) _
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( Update LATEST )
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PC ORG @ 8 + !
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," BLK$ FD$ ' FD@ BLK@* ! ' FD! BLK!* ! " EOT,
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ORG @ 256 /MOD 2 PC! 2 PC!
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H@ 256 /MOD 2 PC! 2 PC!
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