int fsimage_read_sector(const disk_image_t *image, uint8_t *buf, const disk_addr_t *dadr)
{
fsimage_t *fsimage;
fsimage = image->media.fsimage;
if (fsimage->fd == NULL) {
log_error(fsimage_log, "Attempt to read without disk image.");
return CBMDOS_IPE_NOT_READY;
}
switch (image->type) {
case DISK_IMAGE_TYPE_D64:
case DISK_IMAGE_TYPE_D67:
case DISK_IMAGE_TYPE_D71:
case DISK_IMAGE_TYPE_D81:
case DISK_IMAGE_TYPE_D80:
case DISK_IMAGE_TYPE_D82:
case DISK_IMAGE_TYPE_X64:
case DISK_IMAGE_TYPE_D1M:
case DISK_IMAGE_TYPE_D2M:
case DISK_IMAGE_TYPE_D4M:
return fsimage_dxx_read_sector(image, buf, dadr);
case DISK_IMAGE_TYPE_G64:
case DISK_IMAGE_TYPE_G71:
return fsimage_gcr_read_sector(image, buf, dadr);
case DISK_IMAGE_TYPE_P64:
return fsimage_p64_read_sector(image, buf, dadr);
default:
log_error(fsimage_log,
"Unknown disk image type %i. Cannot read sector.",
image->type);
return CBMDOS_IPE_NOT_READY;
}
}
int fsimage_read_sector(disk_image_t *image, BYTE *buf, unsigned int track,
unsigned int sector)
{
int sectors;
long offset;
fsimage_t *fsimage;
fsimage = image->media.fsimage;
if (fsimage->fd == NULL)
{
#ifdef CELL_DEBUG
printf("ERROR: Attempt to read without disk image.\n");
#endif
return 74;
}
switch (image->type) {
case DISK_IMAGE_TYPE_D64:
case DISK_IMAGE_TYPE_D67:
case DISK_IMAGE_TYPE_D71:
case DISK_IMAGE_TYPE_D81:
case DISK_IMAGE_TYPE_D80:
case DISK_IMAGE_TYPE_D82:
case DISK_IMAGE_TYPE_X64:
sectors = disk_image_check_sector(image, track, sector);
if (sectors < 0)
{
#ifdef CELL_DEBUG
printf("ERROR: Track %i, Sector %i out of bounds.\n", track, sector);
#endif
return 66;
}
offset = sectors << 8;
if (image->type == DISK_IMAGE_TYPE_X64)
offset += X64_HEADER_LENGTH;
fseek(fsimage->fd, offset, SEEK_SET);
if (fread((char *)buf, 256, 1, fsimage->fd) < 1)
{
#ifdef CELL_DEBUG
printf("ERROR: Error reading T:%i S:%i from disk image.\n", track, sector);
#endif
return -1;
}
if (fsimage->error_info != NULL) {
switch (fsimage->error_info[sectors]) {
case 0x0:
case 0x1:
return CBMDOS_IPE_OK; /* 0 */
case 0x2:
return CBMDOS_IPE_READ_ERROR_BNF; /* 20 */
case 0x3:
return CBMDOS_IPE_READ_ERROR_SYNC; /* 21 */
case 0x4:
return CBMDOS_IPE_READ_ERROR_DATA; /* 22 */
case 0x5:
return CBMDOS_IPE_READ_ERROR_CHK; /* 23 */
case 0x7:
return CBMDOS_IPE_WRITE_ERROR_VER; /* 25 */
case 0x8:
return CBMDOS_IPE_WRITE_PROTECT_ON; /* 26 */
case 0x9:
return CBMDOS_IPE_READ_ERROR_BCHK; /* 27 */
case 0xA:
return CBMDOS_IPE_WRITE_ERROR_BIG; /* 28 */
case 0xB:
return CBMDOS_IPE_DISK_ID_MISMATCH; /* 29 */
case 0xF:
return CBMDOS_IPE_NOT_READY; /* 74 */
case 0x10:
return CBMDOS_IPE_READ_ERROR_GCR; /* 24 */
default:
return 0;
}
}
break;
case DISK_IMAGE_TYPE_G64:
if (fsimage_gcr_read_sector(image, buf, track, sector) < 0)
return -1;
break;
default:
#ifdef CELL_DEBUG
printf("ERROR: Unknown disk image type %i. Cannot read sector.", image->type);
#endif
return -1;
}
return 0;
}