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Annotation of coherent/a/usr/include.b4ps2/sys/fdioctl.h, revision 1.1.1.1

1.1       root        1: /* (-lgl
                      2:  *     COHERENT Version 4.0
                      3:  *     All rights reserved. May not be copied without permission.
                      4:  -lgl) */
                      5: /*
                      6:  * Floppy io control commands.
                      7:  */
                      8: 
                      9: #ifndef FDIOCTL_H
                     10: #define FDIOCTL_H      FDIOCTL_H
                     11: 
                     12: #define FDIOC          ('F'<<8)
                     13: #define FDFORMAT       (FDIOC|1)       /* Format diskette track */
                     14: 
                     15: /*
                     16:  * Formatting information is largely supplied
                     17:  * by the low nibble of the minor device number opened for formatting
                     18:  * which will specify the number of heads and the track density.
                     19:  *     0       1 head, 40 tracks, 8 sectors per track
                     20:  *     1       2 heads, 40 tracks, 8 sectors per track
                     21:  *     2       2 heads, 80 tracks, 8 sectors per track
                     22:  *     3       1 head, 40 tracks, 9 sectors per track
                     23:  *     4       2 heads, 40 tracks, 9 sectors per track
                     24:  *     5       2 heads, 80 tracks, 9 sectors per track
                     25:  * Each FDFORMAT command will format a single track.
                     26:  * The parameter block consists of an array of fform structures
                     27:  * one for each sector being formatted specifying the cylinder,
                     28:  * head, sector number, and size of the sector.
                     29:  */
                     30: struct fform {
                     31:        char    ff_cylin;       /* 0 .. number of tracks - 1 */
                     32:        char    ff_head;        /* 0 or 1 */
                     33:        char    ff_sect;        /* 1 .. number of sectors */
                     34:        char    ff_size;        /* 1, 2, or 3 for 256, 512, or 1024 */
                     35: };
                     36: 
                     37: #endif

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