/********************************************************************* formats/smx_dsk.c Specialist MX disk images *********************************************************************/ #include #include "smx_dsk.h" #include "basicdsk.h" static FLOPPY_IDENTIFY(smx_dsk_identify) { *vote = (floppy_image_size(floppy) == 819200) ? 100 : 0; return FLOPPY_ERROR_SUCCESS; } static int smx_get_heads_per_disk(floppy_image_legacy *floppy) { return 2; } static int smx_get_tracks_per_disk(floppy_image_legacy *floppy) { return 80; } static UINT64 smx_translate_offset(floppy_image_legacy *floppy, int track, int head, int sector) { return (track * 1024 * 5 * 2) + (head * 1024 * 5) + 1024 * sector; } static floperr_t get_offset(floppy_image_legacy *floppy, int head, int track, int sector, int sector_is_index, UINT64 *offset) { UINT64 offs; /* translate the sector to a raw sector */ if (!sector_is_index) { sector -= 1; } /* check to see if we are out of range */ if ((head < 0) || (head >= 2) || (track < 0) || (track >= 80) || (sector < 0) || (sector >= 6)) return FLOPPY_ERROR_SEEKERROR; offs = smx_translate_offset(floppy, track, head, sector); if (offset) *offset = offs; return FLOPPY_ERROR_SUCCESS; } static floperr_t internal_smx_read_sector(floppy_image_legacy *floppy, int head, int track, int sector, int sector_is_index, void *buffer, size_t buflen) { UINT64 offset; floperr_t err; err = get_offset(floppy, head, track, sector, sector_is_index, &offset); if (err) return err; floppy_image_read(floppy, buffer, offset, buflen); return FLOPPY_ERROR_SUCCESS; } static floperr_t internal_smx_write_sector(floppy_image_legacy *floppy, int head, int track, int sector, int sector_is_index, const void *buffer, size_t buflen, int ddam) { UINT64 offset; floperr_t err; err = get_offset(floppy, head, track, sector, sector_is_index, &offset); if (err) return err; floppy_image_write(floppy, buffer, offset, buflen); return FLOPPY_ERROR_SUCCESS; } static floperr_t smx_read_sector(floppy_image_legacy *floppy, int head, int track, int sector, void *buffer, size_t buflen) { return internal_smx_read_sector(floppy, head, track, sector, FALSE, buffer, buflen); } static floperr_t smx_write_sector(floppy_image_legacy *floppy, int head, int track, int sector, const void *buffer, size_t buflen, int ddam) { return internal_smx_write_sector(floppy, head, track, sector, FALSE, buffer, buflen, ddam); } static floperr_t smx_read_indexed_sector(floppy_image_legacy *floppy, int head, int track, int sector, void *buffer, size_t buflen) { return internal_smx_read_sector(floppy, head, track, sector, TRUE, buffer, buflen); } static floperr_t smx_write_indexed_sector(floppy_image_legacy *floppy, int head, int track, int sector, const void *buffer, size_t buflen, int ddam) { return internal_smx_write_sector(floppy, head, track, sector, TRUE, buffer, buflen, ddam); } static floperr_t smx_get_sector_length(floppy_image_legacy *floppy, int head, int track, int sector, UINT32 *sector_length) { floperr_t err; err = get_offset(floppy, head, track, sector, FALSE, NULL); if (err) return err; if (sector_length) { *sector_length = 1024; } return FLOPPY_ERROR_SUCCESS; } static floperr_t smx_get_indexed_sector_info(floppy_image_legacy *floppy, int head, int track, int sector_index, int *cylinder, int *side, int *sector, UINT32 *sector_length, unsigned long *flags) { sector_index += 1; if (cylinder) *cylinder = track; if (side) *side = head; if (sector) *sector = sector_index; if (flags) /* TODO: read DAM or DDAM and determine flags */ *flags = 0; return smx_get_sector_length(floppy, head, track, sector_index, sector_length); } static FLOPPY_CONSTRUCT(smx_dsk_construct) { struct FloppyCallbacks *callbacks; callbacks = floppy_callbacks(floppy); callbacks->read_sector = smx_read_sector; callbacks->write_sector = smx_write_sector; callbacks->read_indexed_sector = smx_read_indexed_sector; callbacks->write_indexed_sector = smx_write_indexed_sector; callbacks->get_sector_length = smx_get_sector_length; callbacks->get_heads_per_disk = smx_get_heads_per_disk; callbacks->get_tracks_per_disk = smx_get_tracks_per_disk; callbacks->get_indexed_sector_info = smx_get_indexed_sector_info; return FLOPPY_ERROR_SUCCESS; } /* ----------------------------------------------------------------------- */ LEGACY_FLOPPY_OPTIONS_START( specimx ) LEGACY_FLOPPY_OPTION( smx_dsk, "odi", "Specialist MX floppy disk image", smx_dsk_identify, smx_dsk_construct, NULL, NULL) LEGACY_FLOPPY_OPTIONS_END