void fdi_seek(int drive, int track)
{
if (fdd_doublestep_40(drive))
{
if (fdi2raw_get_tpi(fdi[drive].h) < 2)
{
track /= 2;
}
}
if (!fdi[drive].f)
return;
if (track < 0)
track = 0;
if (track > fdi[drive].lasttrack)
track = fdi[drive].lasttrack - 1;
fdi[drive].track = track;
fdi_read_revolution(drive);
}
void img_seek(int drive, int track)
{
int side;
int current_xdft = img[drive].xdf_type - 1;
uint8_t sectors_fat, effective_sectors, sector_gap; /* Needed for XDF */
if (!img[drive].f)
return;
pclog("Seek drive=%i track=%i sectors=%i sector_size=%i sides=%i\n", drive, track, img[drive].sectors,img[drive].sector_size, img[drive].sides);
// pclog(" %i %i\n", drive_type[drive], img[drive].tracks);
if (img[drive].tracks <= 41 && fdd_doublestep_40(drive))
track /= 2;
pclog("Disk seeked to track %i\n", track);
disc_track[drive] = track;
if (img[drive].sides == 2)
{
fseek(img[drive].f, track * img[drive].sectors * img[drive].sector_size * 2, SEEK_SET);
fread(img[drive].track_data[0], img[drive].sectors * img[drive].sector_size, 1, img[drive].f);
fread(img[drive].track_data[1], img[drive].sectors * img[drive].sector_size, 1, img[drive].f);
}
else
{
fseek(img[drive].f, track * img[drive].sectors * img[drive].sector_size, SEEK_SET);
fread(img[drive].track_data[0], img[drive].sectors * img[drive].sector_size, 1, img[drive].f);
}
disc_sector_reset(drive, 0);
disc_sector_reset(drive, 1);
int sector, current_pos;
if (img[drive].xdf_type)
{
sectors_fat = xdf_track0[current_xdft][0];
effective_sectors = xdf_track0[current_xdft][1];
sector_gap = xdf_track0[current_xdft][2];
if (!track)
{
/* Track 0, register sectors according to track 0 map. */
/* First, the "Side 0" buffer, will also contain one sector from side 1. */
current_pos = 0;
for (sector = 0; sector < sectors_fat; sector++)
{
disc_sector_add(drive, 0, track, 0, sector+0x81, 2,
img[drive].bitcell_period_300rpm,
&img[drive].track_data[0][current_pos]);
current_pos += 512;
}
disc_sector_add(drive, 1, track, 1, 0x81, 2,
img[drive].bitcell_period_300rpm,
&img[drive].track_data[0][current_pos]);
current_pos += 512;
for (sector = 0; sector < 8; sector++)
{
disc_sector_add(drive, 0, track, 0, sector+1, 2,
img[drive].bitcell_period_300rpm,
&img[drive].track_data[0][current_pos]);
current_pos += 512;
}
/* Now the "Side 1" buffer, will also contain one sector from side 0. */
current_pos = 0;
for (sector = 0; sector < 14; sector++)
{
disc_sector_add(drive, 1, track, 1, sector+0x82, 2,
img[drive].bitcell_period_300rpm,
&img[drive].track_data[1][current_pos]);
current_pos += 512;
}
current_pos += (5 * 512);
for (; sector < effective_sectors-1; sector++)
{
disc_sector_add(drive, 1, track, 1, sector+0x82, 2,
img[drive].bitcell_period_300rpm,
&img[drive].track_data[1][current_pos]);
current_pos += 512;
}
current_pos += 512;
}
else
{
/* Non-zero track, this will have sectors of various sizes. */
/* First, the "Side 0" buffer. */
current_pos = 0;
for (sector = 0; sector < xdf_spt[current_xdft]; sector++)
{
disc_sector_add(drive, xdf_map[current_xdft][sector][0], track, xdf_map[current_xdft][sector][0],
xdf_map[current_xdft][sector][2] + 0x80, xdf_map[current_xdft][sector][2],
img[drive].bitcell_period_300rpm,
&img[drive].track_data[0][current_pos]);
current_pos += (128 << xdf_map[current_xdft][sector][2]);
}
/* Then, the "Side 1" buffer. */
current_pos = 0;
for (sector = xdf_spt[current_xdft]; sector < (xdf_spt[current_xdft] << 1); sector++)
{
disc_sector_add(drive, xdf_map[current_xdft][sector][0], track, xdf_map[current_xdft][sector][0],
xdf_map[current_xdft][sector][2] + 0x80, xdf_map[current_xdft][sector][2],
img[drive].bitcell_period_300rpm,
&img[drive].track_data[1][current_pos]);
current_pos += (128 << xdf_map[current_xdft][sector][2]);
}
}
}
else
{
for (side = 0; side < img[drive].sides; side++)
{
for (sector = 0; sector < img[drive].sectors; sector++)
disc_sector_add(drive, side, track, side, sector+1, img_sector_size_code(drive),
img[drive].bitcell_period_300rpm,
&img[drive].track_data[side][sector * img->sector_size]);
}
}
}
