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// license:BSD-3-Clause
// copyright-holders:Olivier Galibert
/*********************************************************************
formats/pc98fdi_dsk.h
PC98FDI disk images
*********************************************************************/
#include <assert.h>
#include "pc98fdi_dsk.h"
pc98fdi_format::pc98fdi_format()
{
}
const char *pc98fdi_format::name() const
{
return "pc98_fdi";
}
const char *pc98fdi_format::description() const
{
return "PC98 FDI disk image";
}
const char *pc98fdi_format::extensions() const
{
return "fdi";
}
int pc98fdi_format::identify(io_generic *io, UINT32 form_factor)
{
UINT64 size = io_generic_size(io);
UINT8 h[32];
io_generic_read(io, h, 0, 32);
UINT32 hsize = LITTLE_ENDIANIZE_INT32(*(UINT32 *) (h + 0x8));
UINT32 psize = LITTLE_ENDIANIZE_INT32(*(UINT32 *) (h + 0xc));
UINT32 ssize = LITTLE_ENDIANIZE_INT32(*(UINT32 *) (h + 0x10));
UINT32 scnt = LITTLE_ENDIANIZE_INT32(*(UINT32 *) (h + 0x14));
UINT32 sides = LITTLE_ENDIANIZE_INT32(*(UINT32 *) (h + 0x18));
UINT32 ntrk = LITTLE_ENDIANIZE_INT32(*(UINT32 *) (h + 0x1c));
if(size == hsize + psize && psize == ssize*scnt*sides*ntrk)
return 100;
return 0;
}
bool pc98fdi_format::load(io_generic *io, UINT32 form_factor, floppy_image *image)
{
UINT8 h[32];
io_generic_read(io, h, 0, 32);
UINT32 hsize = LITTLE_ENDIANIZE_INT32(*(UINT32 *)(h+0x8));
UINT32 sector_size = LITTLE_ENDIANIZE_INT32(*(UINT32 *)(h+0x10));
UINT32 sector_count = LITTLE_ENDIANIZE_INT32(*(UINT32 *)(h+0x14));
UINT32 head_count = LITTLE_ENDIANIZE_INT32(*(UINT32 *)(h+0x18));
UINT32 track_count = LITTLE_ENDIANIZE_INT32(*(UINT32 *)(h+0x1c));
int cell_count = form_factor == floppy_image::FF_35 ? 200000 : 166666;
int ssize;
for(ssize=0; (128 << ssize) < sector_size; ssize++) {};
desc_pc_sector sects[256];
UINT8 sect_data[65536];
for(int track=0; track < track_count; track++)
for(int head=0; head < head_count; head++) {
io_generic_read(io, sect_data, hsize + sector_size*sector_count*(track*head_count + head), sector_size*sector_count);
for(int i=0; i<sector_count; i++) {
sects[i].track = track;
sects[i].head = head;
sects[i].sector = i+1;
sects[i].size = ssize;
sects[i].actual_size = sector_size;
sects[i].deleted = false;
sects[i].bad_crc = false;
sects[i].data = sect_data + i*sector_size;
}
build_pc_track_mfm(track, head, image, cell_count, sector_count, sects, calc_default_pc_gap3_size(form_factor, sector_size));
}
return true;
}
bool pc98fdi_format::supports_save() const
{
return false;
}
const floppy_format_type FLOPPY_PC98FDI_FORMAT = &floppy_image_format_creator<pc98fdi_format>;
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