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- 0xff00 CONSTANT RS_ADDR
- 0xfffa CONSTANT PS_ADDR
- RS_ADDR 0x80 - CONSTANT RAMSTART
- 750 LOAD ( 8086 asm )
- 262 LOAD ( xcomp )
- 270 LOAD ( xcomp overrides )
- 812 829 LOADR
- 353 LOAD ( xcomp core low )
- CODE (emit) 1 chkPS,
- AX POPx, AH 0x0e MOVri, ( print char ) 0x10 INT,
- ;CODE
- CODE (key)
- AH AH XORrr, 0x16 INT, AH AH XORrr, AX PUSHx,
- ;CODE
- CODE 13H08H ( driveno -- cx dx )
- DI POPx, DX PUSHx, ( protect ) DX DI MOVxx, AX 0x800 MOVxI,
- DI DI XORxx, ES DI MOVsx,
- 0x13 INT, DI DX MOVxx, DX POPx, ( unprotect )
- CX PUSHx, DI PUSHx,
- DI 0x800 MOVxI, ES DI MOVsx,
- ;CODE
- CODE 13H ( ax bx cx dx -- ax bx cx dx )
- SI POPx, ( DX ) CX POPx, BX POPx, AX POPx,
- DX PUSHx, ( protect ) DX SI MOVxx, DI DI XORxx,
- 0x13 INT, SI DX MOVxx, DX POPx, ( unprotect )
- AX PUSHx, BX PUSHx, CX PUSHx, SI PUSHx,
- ;CODE
- : FDSPT 0x70 RAM+ ;
- : FDHEADS 0x71 RAM+ ;
- : _ ( dest secno )
- ( AH=read sectors, AL=1 sector, BX=dest,
- CH=trackno CL=secno DH=head DL=drive )
- 0x0201 ROT ROT ( AX BX sec )
- FDSPT C@ /MOD ( AX BX sec trk )
- FDHEADS C@ /MOD ( AX BX sec head trk )
- 8 LSHIFT ROT OR 1+ ( AX BX head CX )
- SWAP 8 LSHIFT 0x03 C@ ( boot drive ) OR ( AX BX CX DX )
- 13H 2DROP 2DROP
- ;
- : FD@
- 2 * 16 + ( blkfs starts at sector 16 )
- BLK( OVER _ BLK( 0x200 + SWAP 1+ _ ;
- : FD! DROP ;
- : FD$
- ( get number of sectors per track with command 08H. )
- 0x03 ( boot drive ) C@ 13H08H
- 8 RSHIFT 1+ FDHEADS C!
- 0x3f AND FDSPT C!
- ;
- 380 LOAD ( xcomp core high )
- (entry) _
- ( Update LATEST )
- PC ORG @ 8 + !
- ," BLK$ FD$ "
- ," ' FD@ BLK@* ! "
- ," ' FD! BLK!* ! "
- EOT,
- ORG @ 256 /MOD 2 PC! 2 PC!
- H@ 256 /MOD 2 PC! 2 PC!
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