// license:BSD-3-Clause // copyright-holders:Nigel Barnes /*************************************************************************** Poly CP/M Disk image format FLEX-POLYSYS image formats are handled in flex_dsk. ***************************************************************************/ #include "poly_dsk.h" poly_cpm_format::poly_cpm_format() { } const char *poly_cpm_format::name() const { return "cpm"; } const char *poly_cpm_format::description() const { return "Poly CP/M disk image"; } const char *poly_cpm_format::extensions() const { return "cpm"; } bool poly_cpm_format::supports_save() const { return true; } int poly_cpm_format::identify(io_generic *io, uint32_t form_factor) { uint8_t boot[16]; uint64_t size = io_generic_size(io); // check for valid sizes if (size == 630784 || size == 622592 || size == 256256) { // check for Poly CP/M boot sector io_generic_read(io, boot, 0, 16); if (memcmp(boot, "\x86\xc3\xb7\x00\x00\x8e\x10\xc0\xbf\x00\x01\xbf\xe0\x60\x00\x00", 16) == 0) { return 100; } } return 0; } bool poly_cpm_format::load(io_generic *io, uint32_t form_factor, floppy_image *image) { int total_tracks, spt, bps, head_num; uint64_t size = io_generic_size(io); switch (size) { case 622592: // CP/M 3" disk DSSD total_tracks = 76; spt = 8; bps = 512; head_num = 2; break; case 256256: // CP/M 8" disk SDSD total_tracks = 77; spt = 26; bps = 128; head_num = 1; break; default: // CP/M 8" disk DSSD total_tracks = 77; spt = 8; bps = 512; head_num = 2; break; } int cell_count = (form_factor == floppy_image::FF_525) ? 50000 : 100000; int offset = 0; for (int track = 0; track < total_tracks; track++) for (int head = 0; head < head_num; head++) { desc_pc_sector sects[80]; uint8_t sect_data[20000]; int sdatapos = 0; for (int i = 0; i> 8; sects[i].deleted = false; sects[i].bad_crc = false; sects[i].data = §_data[sdatapos]; io_generic_read(io, sects[i].data, offset, bps); offset += bps; sdatapos += bps; } // gap sizes unverified build_wd_track_fm(track, head, image, cell_count, spt, sects, 24, 16, 11); } return true; } const floppy_format_type FLOPPY_POLY_CPM_FORMAT = &floppy_image_format_creator;