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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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380 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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