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Annotation of researchv10no/sys/io/bad144.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * DEC STD 144 bad block replacement
                      3:  * given a cylinder, track, sector
                      4:  * return a replacement block
                      5:  * the return is an offset:
                      6:  * lbn = (size of disk) - (size of a track) - repno
                      7:  */
                      8: 
                      9: #include "sys/bad144.h"
                     10: 
                     11: int
                     12: bad144rep(bt, cyl, trk, sec)
                     13:        register struct bad144 *bt;
                     14: {
                     15:        register int i;
                     16:        register long blk, bblk;
                     17: 
                     18:        blk = ((long)cyl << 16) + (trk << 8) + sec;
                     19:        for (i = 0; i < NBADDESC; i++) {
                     20:                bblk = ((long)bt->bt_bad[i].bt_cyl << 16) + bt->bt_bad[i].bt_trksec;
                     21:                if (blk == bblk)
                     22:                        return (i);
                     23:                if (blk < bblk || bblk < 0)
                     24:                        break;
                     25:        }
                     26:        return (-1);
                     27: }

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