mirror of https://github.com/hsoft/collapseos.git
17 lines
516 B
Plaintext
17 lines
516 B
Plaintext
: _err LIT" FDerr" ERR ;
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: _cylsec ( sec -- cs, return sector/cylinder for given secid )
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( 4 256b sectors per block, 10 sec per cyl, 40 cyl max )
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10 /MOD ( sec cyl )
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DUP 39 > IF _err THEN
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8 LSHIFT + ( cylsec )
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;
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: FD@! ( wref blk -- )
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1 @DCSTAT NOT IF _err THEN
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2 LSHIFT ( 4 * -- wr sec )
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4 0 DO ( wr sec )
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DUP I + _cylsec ( wr sec cs )
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I 8 LSHIFT BLK( + ( wr sec cs addr )
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1 ROT ROT ( wr sec drv cs addr )
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4 PICK EXECUTE NOT IF _err THEN
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LOOP 2DROP ;
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