// license:GPL-2.0+ // copyright-holders:Dirk Best /*************************************************************************** VDK Disk image format Used by Paul Burgin's PC-Dragon emulator ***************************************************************************/ #include "emu.h" #include "vdk_dsk.h" vdk_format::vdk_format() { } const char *vdk_format::name() const { return "vdk"; } const char *vdk_format::description() const { return "VDK disk image"; } const char *vdk_format::extensions() const { return "vdk"; } int vdk_format::identify(io_generic *io, uint32_t form_factor) { uint8_t id[2]; io_generic_read(io, id, 0, 2); if (id[0] == 'd' && id[1] == 'k') return 50; else return 0; } bool vdk_format::load(io_generic *io, uint32_t form_factor, floppy_image *image) { uint8_t header[0x100]; io_generic_read(io, header, 0, 0x100); int header_size = header[3] * 0x100 + header[2]; int track_count = header[8]; int head_count = header[9]; int file_offset = header_size; for (int track = 0; track < track_count; track++) { for (int head = 0; head < head_count ; head++) { desc_pc_sector sectors[SECTOR_COUNT]; uint8_t sector_data[SECTOR_COUNT * SECTOR_SIZE]; int sector_offset = 0; for (int i = 0; i < SECTOR_COUNT; i++) { sectors[i].track = track; sectors[i].head = head; sectors[i].sector = FIRST_SECTOR_ID + i; sectors[i].actual_size = SECTOR_SIZE; sectors[i].size = SECTOR_SIZE >> 8; sectors[i].deleted = false; sectors[i].bad_crc = false; sectors[i].data = §or_data[sector_offset]; io_generic_read(io, sectors[i].data, file_offset, SECTOR_SIZE); sector_offset += SECTOR_SIZE; file_offset += SECTOR_SIZE; } build_wd_track_mfm(track, head, image, 100000, SECTOR_COUNT, sectors, 22, 32, 24); } } return true; } bool vdk_format::save(io_generic *io, floppy_image *image) { uint8_t bitstream[500000/8]; uint8_t sector_data[50000]; desc_xs sectors[256]; uint64_t file_offset = 0; int track_count, head_count; image->get_actual_geometry(track_count, head_count); // write header uint8_t header[12]; header[0] = 'd'; header[1] = 'k'; header[2] = sizeof(header) % 0x100; header[3] = sizeof(header) / 0x100; header[4] = 0x10; header[5] = 0x10; header[6] = 'M'; header[7] = 0x01; header[8] = track_count; header[9] = head_count; header[10] = 0; header[11] = 0; io_generic_write(io, header, file_offset, sizeof(header)); file_offset += sizeof(header); // write disk data for (int track = 0; track < track_count; track++) { for (int head = 0; head < head_count; head++) { int track_size; generate_bitstream_from_track(track, head, 2000, bitstream, track_size, image); extract_sectors_from_bitstream_mfm_pc(bitstream, track_size, sectors, sector_data, sizeof(sector_data)); for (int i = 0; i < SECTOR_COUNT; i++) { io_generic_write(io, sectors[FIRST_SECTOR_ID + i].data, file_offset, SECTOR_SIZE); file_offset += SECTOR_SIZE; } } } return true; } bool vdk_format::supports_save() const { return true; } const floppy_format_type FLOPPY_VDK_FORMAT = &floppy_image_format_creator;