// license:BSD-3-Clause // copyright-holders:Olivier Galibert /********************************************************************* formats/dim_dsk.cpp DIM disk images *********************************************************************/ #include "dim_dsk.h" #include "ioprocs.h" #include #include dim_format::dim_format() { } const char *dim_format::name() const noexcept { return "dim"; } const char *dim_format::description() const noexcept { return "DIM disk image"; } const char *dim_format::extensions() const noexcept { return "dim"; } int dim_format::identify(util::random_read &io, uint32_t form_factor, const std::vector &variants) const { uint8_t h[16]; auto const [err, actual] = read_at(io, 0xab, h, 16); if(err || (16 != actual)) return 0; if(strncmp((const char *)h, "DIFC HEADER", 11) == 0) return FIFID_SIGN; return 0; } bool dim_format::load(util::random_read &io, uint32_t form_factor, const std::vector &variants, floppy_image &image) const { std::error_condition err; size_t actual; int offset = 0x100; uint8_t h; uint8_t track_total = 77; int cell_count = form_factor == floppy_image::FF_35 ? 200000 : 166666; std::tie(err, actual) = read_at(io, 0, &h, 1); if (err || (1 != actual)) return false; int spt, gap3, bps, size; switch(h) { case 0: default: spt = 8; gap3 = 0x74; size = 3; break; case 1: spt = 9; gap3 = 0x39; size = 3; break; case 3: spt = 9; gap3 = 0x39; size = 3; break; case 2: spt = 15; gap3 = 0x54; size = 2; break; case 9: spt = 18; gap3 = 0x54; size = 2; break; case 17: spt = 26; gap3 = 0x33; size = 1; break; } bps = 128 << size; for(int track=0; track < track_total; track++) for(int head=0; head < 2; head++) { desc_pc_sector sects[30]; uint8_t sect_data[10000]; int sdatapos = 0; for(int i=0; i