mirror of
https://github.com/holub/mame
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71fbb5edc2
BSD licenses to tags since when he copied & pasted them he forgot to remove one instance of my name, which I caught while searching. ;-)
98 lines
2.7 KiB
C
98 lines
2.7 KiB
C
// license:BSD-3-Clause
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// copyright-holders:Olivier Galibert
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/*********************************************************************
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formats/pc98fdi_dsk.h
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PC98FDI disk images
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*********************************************************************/
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#include "emu.h"
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#include "pc98fdi_dsk.h"
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pc98fdi_format::pc98fdi_format()
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{
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}
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const char *pc98fdi_format::name() const
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{
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return "pc98-fdi";
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}
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const char *pc98fdi_format::description() const
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{
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return "PC98 FDI disk image";
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}
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const char *pc98fdi_format::extensions() const
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{
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return "fdi";
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}
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int pc98fdi_format::identify(io_generic *io, UINT32 form_factor)
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{
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UINT64 size = io_generic_size(io);
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UINT8 h[32];
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io_generic_read(io, h, 0, 32);
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UINT32 hsize = LITTLE_ENDIANIZE_INT32(*(UINT32 *) (h + 0x8));
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UINT32 psize = LITTLE_ENDIANIZE_INT32(*(UINT32 *) (h + 0xc));
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UINT32 ssize = LITTLE_ENDIANIZE_INT32(*(UINT32 *) (h + 0x10));
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UINT32 scnt = LITTLE_ENDIANIZE_INT32(*(UINT32 *) (h + 0x14));
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UINT32 sides = LITTLE_ENDIANIZE_INT32(*(UINT32 *) (h + 0x18));
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UINT32 ntrk = LITTLE_ENDIANIZE_INT32(*(UINT32 *) (h + 0x1c));
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if(size == hsize + psize && psize == ssize*scnt*sides*ntrk)
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return 100;
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return 0;
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}
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bool pc98fdi_format::load(io_generic *io, UINT32 form_factor, floppy_image *image)
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{
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UINT8 h[32];
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io_generic_read(io, h, 0, 32);
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UINT32 hsize = LITTLE_ENDIANIZE_INT32(*(UINT32 *)(h+0x8));
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UINT32 sector_size = LITTLE_ENDIANIZE_INT32(*(UINT32 *)(h+0x10));
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UINT32 sector_count = LITTLE_ENDIANIZE_INT32(*(UINT32 *)(h+0x14));
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UINT32 head_count = LITTLE_ENDIANIZE_INT32(*(UINT32 *)(h+0x18));
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UINT32 track_count = LITTLE_ENDIANIZE_INT32(*(UINT32 *)(h+0x1c));
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int cell_count = form_factor == floppy_image::FF_35 ? 200000 : 166666;
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int ssize;
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for(ssize=0; (128 << ssize) < sector_size; ssize++);
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desc_pc_sector sects[256];
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UINT8 sect_data[65536];
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for(int track=0; track < track_count; track++)
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for(int head=0; head < head_count; head++) {
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io_generic_read(io, sect_data, hsize + sector_size*sector_count*(track*head_count + head), sector_size*sector_count);
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for(int i=0; i<sector_count; i++) {
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sects[i].track = track;
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sects[i].head = head;
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sects[i].sector = i+1;
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sects[i].size = ssize;
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sects[i].actual_size = sector_size;
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sects[i].deleted = false;
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sects[i].bad_crc = false;
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sects[i].data = sect_data + i*sector_size;
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}
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build_pc_track_mfm(track, head, image, cell_count, sector_count, sects, calc_default_pc_gap3_size(form_factor, sector_size));
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}
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return true;
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}
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bool pc98fdi_format::supports_save() const
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{
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return false;
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}
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const floppy_format_type FLOPPY_PC98FDI_FORMAT = &floppy_image_format_creator<pc98fdi_format>;
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