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5a77b80d3d
I had forgotten that heads index increment before track index.
10 lines
310 B
Plaintext
10 lines
310 B
Plaintext
: _ ( AX BX sec )
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( AH=read sectors, AL=1 sector, BX=dest,
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CH=trackno CL=secno DH=head DL=drive )
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FDSPT C@ /MOD ( AX BX sec trk )
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FDHEADS C@ /MOD ( AX BX sec head trk )
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8 LSHIFT ROT OR 1+ ( AX BX head CX )
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SWAP 8 LSHIFT 0x03 C@ ( boot drive ) OR ( AX BX CX DX )
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13H 2DROP 2DROP
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;
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