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https://github.com/hsoft/collapseos.git
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91f79d1131
The idea is to consider assemblers as "runtime" apps instead of placing them in the "bootstrap" section of the blocks. These apps will be used for much more than bootstrapping. Moved its documentation to doc/asm.txt and made its code blocks more compact.
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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380 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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