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705d68deec
With KEY and EMIT being switch words, most of the high layer can be defined before drivers. In addition to this change, I've compacted core blocks which were becoming quite sparse.
27 lines
820 B
Forth
27 lines
820 B
Forth
0xff00 CONSTANT RS_ADDR
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0xfffa CONSTANT PS_ADDR
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RS_ADDR 0x80 - CONSTANT SYSVARS
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30 LOAD ( 8086 asm )
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262 LOAD ( xcomp ) 270 LOAD ( xcomp overrides )
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445 461 LOADR ( 8086 boot code )
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353 LOAD ( xcomp core low )
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CODE (emit) AX POPx, 1 INT, ;CODE
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CODE (key) 2 INT, AH 0 MOVri, AX PUSHx, ;CODE
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: COLS 80 ; : LINES 25 ;
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CODE AT-XY ( x y ) BX POPx, AX POPx, 3 INT, ;CODE
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CODE _ BX POPx, AX POPx, 4 INT, ;CODE
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: EFS@ BLK( _ ;
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CODE _ BX POPx, AX POPx, 5 INT, ;CODE
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: EFS! BLK( _ ;
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( 8086 port doesn't define PC@ and PC!, but test harness uses
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it. Our forth binary uses INT 6 for retcode. )
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CODE PC! AX POPx, ( discard ) AX POPx, 6 INT, ;CODE
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390 LOAD ( xcomp core high )
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(entry) _ ( Update LATEST ) PC ORG @ 8 + !
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," BLK$ "
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," ' EFS@ BLK@* ! "
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," ' EFS! BLK!* ! "
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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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