mirror of
https://github.com/holub/mame
synced 2025-07-05 09:57:47 +03:00
pc floppies: Merge the common parts of d88/imd [O. Galibert]
This commit is contained in:
Olivier Galibert
parent
8a1f60fcfd
commit
a0c70ecb0c
@ -504,7 +504,6 @@ bool d88_format::load(io_generic *io, UINT32 form_factor, floppy_image *image)
|
|||||||
if(!head_count)
|
if(!head_count)
|
||||||
return false;
|
return false;
|
||||||
|
|
||||||
UINT32 *track_data = global_alloc_array(UINT32, cell_count+10000);
|
|
||||||
UINT32 track_pos[164];
|
UINT32 track_pos[164];
|
||||||
io_generic_read(io, track_pos, 32, 164*4);
|
io_generic_read(io, track_pos, 32, 164*4);
|
||||||
|
|
||||||
@ -514,97 +513,49 @@ bool d88_format::load(io_generic *io, UINT32 form_factor, floppy_image *image)
|
|||||||
if(!pos)
|
if(!pos)
|
||||||
continue;
|
continue;
|
||||||
|
|
||||||
|
desc_pc_sector sects[256];
|
||||||
UINT8 sect_data[65536];
|
UINT8 sect_data[65536];
|
||||||
int tpos = 0;
|
int sdatapos = 0;
|
||||||
|
|
||||||
// gap 4a , IAM and gap 1
|
|
||||||
for(int i=0; i<80; i++) mfm_w(track_data, tpos, 8, 0x4e);
|
|
||||||
for(int i=0; i<12; i++) mfm_w(track_data, tpos, 8, 0x00);
|
|
||||||
for(int i=0; i< 3; i++) raw_w(track_data, tpos, 16, 0x5224);
|
|
||||||
mfm_w(track_data, tpos, 8, 0xfc);
|
|
||||||
for(int i=0; i<50; i++) mfm_w(track_data, tpos, 8, 0x4e);
|
|
||||||
|
|
||||||
// Read all sector headers to compute the available and expected size for gap3
|
|
||||||
int sector_count = 1;
|
int sector_count = 1;
|
||||||
int gap3 = 84;
|
|
||||||
int etpos = tpos;
|
|
||||||
int rpos = pos;
|
|
||||||
for(int i=0; i<sector_count; i++) {
|
|
||||||
UINT8 hs[16];
|
|
||||||
io_generic_read(io, hs, rpos, 16);
|
|
||||||
UINT16 size = LITTLE_ENDIANIZE_INT16(*(UINT16 *)(hs+14));
|
|
||||||
rpos += 16+size;
|
|
||||||
if(i == 0) {
|
|
||||||
sector_count = LITTLE_ENDIANIZE_INT16(*(UINT16 *)(hs+4));
|
|
||||||
if(size < 512)
|
|
||||||
gap3 = form_factor == floppy_image::FF_35 ? 54 : 50;
|
|
||||||
else
|
|
||||||
gap3 = form_factor == floppy_image::FF_35 ? 84 : 80;
|
|
||||||
}
|
|
||||||
etpos += (12+3+5+2+22+12+3+1+size+2)*16;
|
|
||||||
}
|
|
||||||
|
|
||||||
if(etpos > cell_count)
|
|
||||||
throw emu_fatalerror("d88_format: Incorrect layout on track %d head %d, expected_size=%d, current_size=%d", track, head, cell_count, etpos);
|
|
||||||
|
|
||||||
if(etpos + gap3*16*(sector_count-1) > cell_count)
|
|
||||||
gap3 = (cell_count - etpos) / 16 / (sector_count-1);
|
|
||||||
|
|
||||||
// Build the track
|
|
||||||
for(int i=0; i<sector_count; i++) {
|
for(int i=0; i<sector_count; i++) {
|
||||||
UINT8 hs[16];
|
UINT8 hs[16];
|
||||||
io_generic_read(io, hs, pos, 16);
|
io_generic_read(io, hs, pos, 16);
|
||||||
|
pos += 16;
|
||||||
|
|
||||||
UINT16 size = LITTLE_ENDIANIZE_INT16(*(UINT16 *)(hs+14));
|
UINT16 size = LITTLE_ENDIANIZE_INT16(*(UINT16 *)(hs+14));
|
||||||
io_generic_read(io, sect_data, pos+16, size);
|
if(i == 0)
|
||||||
pos += 16+size;
|
sector_count = LITTLE_ENDIANIZE_INT16(*(UINT16 *)(hs+4));
|
||||||
|
|
||||||
int cpos;
|
sects[i].track = hs[0];
|
||||||
UINT16 crc;
|
sects[i].head = hs[1];
|
||||||
// sync and IDAM and gap 2
|
sects[i].sector = hs[2];
|
||||||
for(int j=0; j<12; j++) mfm_w(track_data, tpos, 8, 0x00);
|
sects[i].size = hs[3];
|
||||||
cpos = tpos;
|
sects[i].actual_size = size;
|
||||||
for(int j=0; j< 3; j++) raw_w(track_data, tpos, 16, 0x4489);
|
sects[i].deleted = hs[7] != 0;
|
||||||
mfm_w(track_data, tpos, 8, 0xfe);
|
sects[i].bad_crc = false;
|
||||||
mfm_w(track_data, tpos, 8, hs[0]);
|
|
||||||
mfm_w(track_data, tpos, 8, hs[1]);
|
|
||||||
mfm_w(track_data, tpos, 8, hs[2]);
|
|
||||||
mfm_w(track_data, tpos, 8, hs[3]);
|
|
||||||
crc = calc_crc_ccitt(track_data, cpos, tpos);
|
|
||||||
mfm_w(track_data, tpos, 16, crc);
|
|
||||||
for(int j=0; j<22; j++) mfm_w(track_data, tpos, 8, 0x4e);
|
|
||||||
|
|
||||||
// sync, DAM, data and gap 3
|
if(size) {
|
||||||
for(int j=0; j<12; j++) mfm_w(track_data, tpos, 8, 0x00);
|
sects[i].data = sect_data + sdatapos;
|
||||||
cpos = tpos;
|
io_generic_read(io, sects[i].data, pos+16, size);
|
||||||
for(int j=0; j< 3; j++) raw_w(track_data, tpos, 16, 0x4489);
|
pos += size;
|
||||||
mfm_w(track_data, tpos, 8, hs[7] ? 0xf8 : 0xfb);
|
}
|
||||||
for(int j=0; j<size; j++) mfm_w(track_data, tpos, 8, sect_data[j]);
|
|
||||||
crc = calc_crc_ccitt(track_data, cpos, tpos);
|
|
||||||
mfm_w(track_data, tpos, 16, crc);
|
|
||||||
for(int j=0; j<gap3; j++) mfm_w(track_data, tpos, 8, 0x4e);
|
|
||||||
}
|
}
|
||||||
|
|
||||||
// Gap 4b
|
build_pc_track_mfm(track, head, image, cell_count, sector_count, sects, calc_default_pc_gap3_size(form_factor, sects[0].actual_size));
|
||||||
|
|
||||||
while(tpos < cell_count-15) mfm_w(track_data, tpos, 8, 0x4e);
|
|
||||||
raw_w(track_data, tpos, cell_count-tpos, 0x9254 >> (16+tpos-cell_count));
|
|
||||||
|
|
||||||
generate_track_from_levels(track, head, track_data, cell_count, 0, image);
|
|
||||||
}
|
}
|
||||||
|
|
||||||
global_free(track_data);
|
|
||||||
return true;
|
return true;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
||||||
bool d88_format::save(io_generic *io, floppy_image *image)
|
bool d88_format::save(io_generic *io, floppy_image *image)
|
||||||
{
|
{
|
||||||
return true;
|
return false;
|
||||||
}
|
}
|
||||||
|
|
||||||
bool d88_format::supports_save() const
|
bool d88_format::supports_save() const
|
||||||
{
|
{
|
||||||
return true;
|
return false;
|
||||||
}
|
}
|
||||||
|
|
||||||
const floppy_format_type FLOPPY_D88_FORMAT = &floppy_image_format_creator<d88_format>;
|
const floppy_format_type FLOPPY_D88_FORMAT = &floppy_image_format_creator<d88_format>;
|
||||||
|
|||||||
@ -2463,3 +2463,162 @@ void floppy_image_format_t::get_track_data_fm_pc(int track, int head, floppy_ima
|
|||||||
memset(sd, 0, sector_size);
|
memset(sd, 0, sector_size);
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
int floppy_image_format_t::calc_default_pc_gap3_size(UINT32 form_factor, int sector_size)
|
||||||
|
{
|
||||||
|
return
|
||||||
|
form_factor == floppy_image::FF_8 ? 25 :
|
||||||
|
sector_size < 512 ?
|
||||||
|
(form_factor == floppy_image::FF_35 ? 54 : 50) :
|
||||||
|
(form_factor == floppy_image::FF_35 ? 84 : 80);
|
||||||
|
}
|
||||||
|
|
||||||
|
void floppy_image_format_t::build_wd_track_fm(int track, int head, floppy_image *image, int cell_count, int sector_count, const desc_pc_sector *sects, int gap_3, int gap_1, int gap_2)
|
||||||
|
{
|
||||||
|
build_pc_track_fm(track, head, image, cell_count, sector_count, sects, gap_3, -1, gap_1, gap_2);
|
||||||
|
}
|
||||||
|
|
||||||
|
void floppy_image_format_t::build_wd_track_mfm(int track, int head, floppy_image *image, int cell_count, int sector_count, const desc_pc_sector *sects, int gap_3, int gap_1, int gap_2)
|
||||||
|
{
|
||||||
|
build_pc_track_mfm(track, head, image, cell_count, sector_count, sects, gap_3, -1, gap_1, gap_2);
|
||||||
|
}
|
||||||
|
|
||||||
|
void floppy_image_format_t::build_pc_track_fm(int track, int head, floppy_image *image, int cell_count, int sector_count, const desc_pc_sector *sects, int gap_3, int gap_4a, int gap_1, int gap_2)
|
||||||
|
{
|
||||||
|
UINT32 *track_data = global_alloc_array(UINT32, cell_count+10000);
|
||||||
|
int tpos = 0;
|
||||||
|
|
||||||
|
// gap 4a , IAM and gap 1
|
||||||
|
if(gap_4a != -1) {
|
||||||
|
for(int i=0; i<gap_4a; i++) fm_w(track_data, tpos, 8, 0xff);
|
||||||
|
for(int i=0; i< 6; i++) fm_w(track_data, tpos, 8, 0x00);
|
||||||
|
raw_w(track_data, tpos, 16, 0xf77a);
|
||||||
|
}
|
||||||
|
for(int i=0; i<gap_1; i++) fm_w(track_data, tpos, 8, 0xff);
|
||||||
|
|
||||||
|
int total_size = 0;
|
||||||
|
for(int i=0; i<sector_count; i++)
|
||||||
|
total_size += sects[i].actual_size;
|
||||||
|
|
||||||
|
int etpos = tpos;
|
||||||
|
etpos += (sector_count*(6+5+2+11+6+1+2) + total_size)*16;
|
||||||
|
|
||||||
|
if(etpos > cell_count)
|
||||||
|
throw emu_fatalerror("Incorrect layout on track %d head %d, expected_size=%d, current_size=%d", track, head, cell_count, etpos);
|
||||||
|
|
||||||
|
if(etpos + gap_3*16*(sector_count-1) > cell_count)
|
||||||
|
gap_3 = (cell_count - etpos) / 16 / (sector_count-1);
|
||||||
|
|
||||||
|
// Build the track
|
||||||
|
for(int i=0; i<sector_count; i++) {
|
||||||
|
int cpos;
|
||||||
|
UINT16 crc;
|
||||||
|
// sync and IDAM and gap 2
|
||||||
|
for(int j=0; j< 6; j++) fm_w(track_data, tpos, 8, 0x00);
|
||||||
|
cpos = tpos;
|
||||||
|
raw_w(track_data, tpos, 16, 0xf57e);
|
||||||
|
fm_w (track_data, tpos, 8, sects[i].track);
|
||||||
|
fm_w (track_data, tpos, 8, sects[i].head);
|
||||||
|
fm_w (track_data, tpos, 8, sects[i].sector);
|
||||||
|
fm_w (track_data, tpos, 8, sects[i].size);
|
||||||
|
crc = calc_crc_ccitt(track_data, cpos, tpos);
|
||||||
|
fm_w (track_data, tpos, 16, crc);
|
||||||
|
for(int j=0; j<gap_2; j++) fm_w(track_data, tpos, 8, 0xff);
|
||||||
|
|
||||||
|
if(!sects[i].data)
|
||||||
|
for(int j=0; j<6+1+sects[i].actual_size+2+gap_3; j++) fm_w(track_data, tpos, 8, 0xff);
|
||||||
|
|
||||||
|
else {
|
||||||
|
// sync, DAM, data and gap 3
|
||||||
|
for(int j=0; j< 6; j++) fm_w(track_data, tpos, 8, 0x00);
|
||||||
|
cpos = tpos;
|
||||||
|
raw_w(track_data, tpos, 16, sects[i].deleted ? 0xf56a : 0xf56f);
|
||||||
|
for(int j=0; j<sects[i].actual_size; j++) fm_w(track_data, tpos, 8, sects[i].data[j]);
|
||||||
|
crc = calc_crc_ccitt(track_data, cpos, tpos);
|
||||||
|
if(sects[i].bad_crc)
|
||||||
|
crc = 0xffff^crc;
|
||||||
|
fm_w(track_data, tpos, 16, crc);
|
||||||
|
for(int j=0; j<gap_3; j++) fm_w(track_data, tpos, 8, 0xff);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Gap 4b
|
||||||
|
|
||||||
|
while(tpos < cell_count-15) fm_w(track_data, tpos, 8, 0xff);
|
||||||
|
raw_w(track_data, tpos, cell_count-tpos, 0xffff >> (16+tpos-cell_count));
|
||||||
|
|
||||||
|
generate_track_from_levels(track, head, track_data, cell_count, 0, image);
|
||||||
|
global_free(track_data);
|
||||||
|
}
|
||||||
|
|
||||||
|
void floppy_image_format_t::build_pc_track_mfm(int track, int head, floppy_image *image, int cell_count, int sector_count, const desc_pc_sector *sects, int gap_3, int gap_4a, int gap_1, int gap_2)
|
||||||
|
{
|
||||||
|
UINT32 *track_data = global_alloc_array(UINT32, cell_count+10000);
|
||||||
|
int tpos = 0;
|
||||||
|
|
||||||
|
// gap 4a , IAM and gap 1
|
||||||
|
if(gap_4a != -1) {
|
||||||
|
for(int i=0; i<gap_4a; i++) mfm_w(track_data, tpos, 8, 0x4e);
|
||||||
|
for(int i=0; i<12; i++) mfm_w(track_data, tpos, 8, 0x00);
|
||||||
|
for(int i=0; i< 3; i++) raw_w(track_data, tpos, 16, 0x5224);
|
||||||
|
mfm_w(track_data, tpos, 8, 0xfc);
|
||||||
|
}
|
||||||
|
for(int i=0; i<gap_1; i++) mfm_w(track_data, tpos, 8, 0x4e);
|
||||||
|
|
||||||
|
int total_size = 0;
|
||||||
|
for(int i=0; i<sector_count; i++)
|
||||||
|
total_size += sects[i].actual_size;
|
||||||
|
|
||||||
|
int etpos = tpos;
|
||||||
|
etpos += (sector_count*(12+3+5+2+gap_2+12+3+1+2) + total_size)*16;
|
||||||
|
|
||||||
|
if(etpos > cell_count)
|
||||||
|
throw emu_fatalerror("Incorrect layout on track %d head %d, expected_size=%d, current_size=%d", track, head, cell_count, etpos);
|
||||||
|
|
||||||
|
if(etpos + gap_3*16*(sector_count-1) > cell_count)
|
||||||
|
gap_3 = (cell_count - etpos) / 16 / (sector_count-1);
|
||||||
|
|
||||||
|
// Build the track
|
||||||
|
for(int i=0; i<sector_count; i++) {
|
||||||
|
int cpos;
|
||||||
|
UINT16 crc;
|
||||||
|
// sync and IDAM and gap 2
|
||||||
|
for(int j=0; j<12; j++) mfm_w(track_data, tpos, 8, 0x00);
|
||||||
|
cpos = tpos;
|
||||||
|
for(int j=0; j< 3; j++) raw_w(track_data, tpos, 16, 0x4489);
|
||||||
|
mfm_w(track_data, tpos, 8, 0xfe);
|
||||||
|
mfm_w(track_data, tpos, 8, sects[i].track);
|
||||||
|
mfm_w(track_data, tpos, 8, sects[i].head);
|
||||||
|
mfm_w(track_data, tpos, 8, sects[i].sector);
|
||||||
|
mfm_w(track_data, tpos, 8, sects[i].size);
|
||||||
|
crc = calc_crc_ccitt(track_data, cpos, tpos);
|
||||||
|
mfm_w(track_data, tpos, 16, crc);
|
||||||
|
for(int j=0; j<gap_2; j++) mfm_w(track_data, tpos, 8, 0x4e);
|
||||||
|
|
||||||
|
if(!sects[i].data)
|
||||||
|
for(int j=0; j<12+4+sects[i].actual_size+2+gap_3; j++) mfm_w(track_data, tpos, 8, 0x4e);
|
||||||
|
|
||||||
|
else {
|
||||||
|
// sync, DAM, data and gap 3
|
||||||
|
for(int j=0; j<12; j++) mfm_w(track_data, tpos, 8, 0x00);
|
||||||
|
cpos = tpos;
|
||||||
|
for(int j=0; j< 3; j++) raw_w(track_data, tpos, 16, 0x4489);
|
||||||
|
mfm_w(track_data, tpos, 8, sects[i].deleted ? 0xf8 : 0xfb);
|
||||||
|
for(int j=0; j<sects[i].actual_size; j++) mfm_w(track_data, tpos, 8, sects[i].data[j]);
|
||||||
|
crc = calc_crc_ccitt(track_data, cpos, tpos);
|
||||||
|
if(sects[i].bad_crc)
|
||||||
|
crc = 0xffff^crc;
|
||||||
|
mfm_w(track_data, tpos, 16, crc);
|
||||||
|
for(int j=0; j<gap_3; j++) mfm_w(track_data, tpos, 8, 0x4e);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Gap 4b
|
||||||
|
|
||||||
|
while(tpos < cell_count-15) mfm_w(track_data, tpos, 8, 0x4e);
|
||||||
|
raw_w(track_data, tpos, cell_count-tpos, 0x9254 >> (16+tpos-cell_count));
|
||||||
|
|
||||||
|
generate_track_from_levels(track, head, track_data, cell_count, 0, image);
|
||||||
|
global_free(track_data);
|
||||||
|
}
|
||||||
|
|
||||||
|
|||||||
@ -469,6 +469,21 @@ protected:
|
|||||||
const UINT8 *data; //!< Data within this sector
|
const UINT8 *data; //!< Data within this sector
|
||||||
};
|
};
|
||||||
|
|
||||||
|
struct desc_pc_sector {
|
||||||
|
UINT8 track, head, sector, size;
|
||||||
|
int actual_size;
|
||||||
|
UINT8 *data;
|
||||||
|
bool deleted;
|
||||||
|
bool bad_crc;
|
||||||
|
};
|
||||||
|
|
||||||
|
int calc_default_pc_gap3_size(UINT32 form_factor, int sector_size);
|
||||||
|
void build_wd_track_fm(int track, int head, floppy_image *image, int cell_count, int sector_count, const desc_pc_sector *sects, int gap_3, int gap_1, int gap_2);
|
||||||
|
void build_wd_track_mfm(int track, int head, floppy_image *image, int cell_count, int sector_count, const desc_pc_sector *sects, int gap_3, int gap_1, int gap_2=22);
|
||||||
|
void build_pc_track_fm(int track, int head, floppy_image *image, int cell_count, int sector_count, const desc_pc_sector *sects, int gap_3, int gap_4a=40, int gap_1=26, int gap_2=11);
|
||||||
|
void build_pc_track_mfm(int track, int head, floppy_image *image, int cell_count, int sector_count, const desc_pc_sector *sects, int gap_3, int gap_4a=80, int gap_1=50, int gap_2=22);
|
||||||
|
|
||||||
|
|
||||||
//! @brief Extract standard sectors from a regenerated bitstream.
|
//! @brief Extract standard sectors from a regenerated bitstream.
|
||||||
//! Sectors must point to an array of 256 desc_xs.
|
//! Sectors must point to an array of 256 desc_xs.
|
||||||
|
|
||||||
|
|||||||
@ -414,7 +414,7 @@ bool imd_format::load(io_generic *io, UINT32 form_factor, floppy_image *image)
|
|||||||
if(ssize == 0xff)
|
if(ssize == 0xff)
|
||||||
throw emu_fatalerror("imd_format: Unsupported variable sector size on track %d head %d", track, head);
|
throw emu_fatalerror("imd_format: Unsupported variable sector size on track %d head %d", track, head);
|
||||||
|
|
||||||
UINT32 size = ssize < 7 ? 128 << ssize : 8192;
|
UINT32 actual_size = ssize < 7 ? 128 << ssize : 8192;
|
||||||
|
|
||||||
static const int rates[3] = { 500000, 300000, 250000 };
|
static const int rates[3] = { 500000, 300000, 250000 };
|
||||||
bool fm = mode < 3;
|
bool fm = mode < 3;
|
||||||
@ -433,135 +433,44 @@ bool imd_format::load(io_generic *io, UINT32 form_factor, floppy_image *image)
|
|||||||
|
|
||||||
head &= 0x3f;
|
head &= 0x3f;
|
||||||
|
|
||||||
UINT32 *track_data = global_alloc_array(UINT32, cell_count+10000);
|
int gap_3 = calc_default_pc_gap3_size(form_factor, actual_size);
|
||||||
int tpos = 0;
|
|
||||||
|
|
||||||
// gap 4a , IAM and gap 1
|
desc_pc_sector sects[256];
|
||||||
if(fm) {
|
|
||||||
for(int i=0; i<40; i++) fm_w(track_data, tpos, 8, 0xff);
|
for(int i=0; i<sector_count; i++) {
|
||||||
for(int i=0; i< 6; i++) fm_w(track_data, tpos, 8, 0x00);
|
UINT8 stype = img[pos++];
|
||||||
raw_w(track_data, tpos, 16, 0xf77a);
|
sects[i].track = tnum ? tnum[i] : track;
|
||||||
for(int i=0; i<26; i++) fm_w(track_data, tpos, 8, 0xff);
|
sects[i].head = hnum ? hnum[i] : head;
|
||||||
} else {
|
sects[i].sector = snum[i];
|
||||||
for(int i=0; i<80; i++) mfm_w(track_data, tpos, 8, 0x4e);
|
sects[i].size = ssize;
|
||||||
for(int i=0; i<12; i++) mfm_w(track_data, tpos, 8, 0x00);
|
sects[i].actual_size = actual_size;
|
||||||
for(int i=0; i< 3; i++) raw_w(track_data, tpos, 16, 0x5224);
|
|
||||||
mfm_w(track_data, tpos, 8, 0xfc);
|
if(stype == 0 || stype > 8) {
|
||||||
for(int i=0; i<50; i++) mfm_w(track_data, tpos, 8, 0x4e);
|
sects[i].data = NULL;
|
||||||
|
|
||||||
|
} else {
|
||||||
|
sects[i].deleted = stype == 3 || stype == 4 || stype == 7 || stype == 8;
|
||||||
|
sects[i].bad_crc = stype == 5 || stype == 6 || stype == 7 || stype == 8;
|
||||||
|
|
||||||
|
if(stype == 2 || stype == 4 || stype == 6 || stype == 8) {
|
||||||
|
sects[i].data = global_alloc_array(UINT8, actual_size);
|
||||||
|
memset(sects[i].data, img[pos++], actual_size);
|
||||||
|
|
||||||
|
} else {
|
||||||
|
sects[i].data = img + pos;
|
||||||
|
pos += actual_size;
|
||||||
|
}
|
||||||
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
// Compute the available and expected size for gap3
|
|
||||||
int gap3 = form_factor == floppy_image::FF_8 ? 25 :
|
|
||||||
size < 512 ?
|
|
||||||
(form_factor == floppy_image::FF_35 ? 54 : 50) :
|
|
||||||
(form_factor == floppy_image::FF_35 ? 84 : 80);
|
|
||||||
|
|
||||||
int etpos = tpos;
|
|
||||||
if(fm)
|
if(fm)
|
||||||
etpos += sector_count*(6+5+2+11+6+1+size+2)*16;
|
build_pc_track_fm(track, head, image, cell_count, sector_count, sects, gap_3);
|
||||||
else
|
else
|
||||||
etpos += sector_count*(12+3+5+2+22+12+3+1+size+2)*16;
|
build_pc_track_mfm(track, head, image, cell_count, sector_count, sects, gap_3);
|
||||||
|
|
||||||
if(etpos > cell_count)
|
for(int i=0; i<sector_count; i++)
|
||||||
throw emu_fatalerror("imd_format: Incorrect layout on track %d head %d, expected_size=%d, current_size=%d", track, head, cell_count, etpos);
|
if(sects[i].data && (sects[i].data < img || sects[i].data >= img+size))
|
||||||
|
global_free(sects[i].data);
|
||||||
if(etpos + gap3*16*(sector_count-1) > cell_count)
|
|
||||||
gap3 = (cell_count - etpos) / 16 / (sector_count-1);
|
|
||||||
|
|
||||||
// Build the track
|
|
||||||
if(fm) {
|
|
||||||
for(int i=0; i<sector_count; i++) {
|
|
||||||
UINT8 stype = img[pos++];
|
|
||||||
|
|
||||||
int cpos;
|
|
||||||
UINT16 crc;
|
|
||||||
// sync and IDAM and gap 2
|
|
||||||
for(int j=0; j< 6; j++) fm_w(track_data, tpos, 8, 0x00);
|
|
||||||
cpos = tpos;
|
|
||||||
raw_w(track_data, tpos, 16, 0xf57e);
|
|
||||||
fm_w (track_data, tpos, 8, tnum ? tnum[i] : track);
|
|
||||||
fm_w (track_data, tpos, 8, hnum ? hnum[i] : head);
|
|
||||||
fm_w (track_data, tpos, 8, snum[i]);
|
|
||||||
fm_w (track_data, tpos, 8, ssize);
|
|
||||||
crc = calc_crc_ccitt(track_data, cpos, tpos);
|
|
||||||
fm_w (track_data, tpos, 16, crc);
|
|
||||||
for(int j=0; j<11; j++) fm_w(track_data, tpos, 8, 0xff);
|
|
||||||
|
|
||||||
if(stype == 0 || stype > 8)
|
|
||||||
for(int j=0; j<6+1+size+2+gap3; j++) fm_w(track_data, tpos, 8, 0xff);
|
|
||||||
|
|
||||||
else {
|
|
||||||
// sync, DAM, data and gap 3
|
|
||||||
for(int j=0; j< 6; j++) fm_w(track_data, tpos, 8, 0x00);
|
|
||||||
cpos = tpos;
|
|
||||||
raw_w(track_data, tpos, 16, stype == 3 || stype == 4 || stype == 7 || stype == 8 ? 0xf56a : 0xf56f);
|
|
||||||
if(stype == 2 || stype == 4 || stype == 6 || stype == 8) {
|
|
||||||
for(int j=0; j<size; j++) fm_w(track_data, tpos, 8, img[pos]);
|
|
||||||
pos++;
|
|
||||||
} else
|
|
||||||
for(int j=0; j<size; j++) fm_w(track_data, tpos, 8, img[pos++]);
|
|
||||||
crc = calc_crc_ccitt(track_data, cpos, tpos);
|
|
||||||
if(stype == 5 || stype == 6 || stype == 7 || stype == 8)
|
|
||||||
crc = 0xffff^crc;
|
|
||||||
fm_w(track_data, tpos, 16, crc);
|
|
||||||
for(int j=0; j<gap3; j++) fm_w(track_data, tpos, 8, 0xff);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
// Gap 4b
|
|
||||||
|
|
||||||
while(tpos < cell_count-15) fm_w(track_data, tpos, 8, 0xff);
|
|
||||||
raw_w(track_data, tpos, cell_count-tpos, 0xffff >> (16+tpos-cell_count));
|
|
||||||
|
|
||||||
} else {
|
|
||||||
for(int i=0; i<sector_count; i++) {
|
|
||||||
UINT8 stype = img[pos++];
|
|
||||||
|
|
||||||
int cpos;
|
|
||||||
UINT16 crc;
|
|
||||||
// sync and IDAM and gap 2
|
|
||||||
for(int j=0; j<12; j++) mfm_w(track_data, tpos, 8, 0x00);
|
|
||||||
cpos = tpos;
|
|
||||||
for(int j=0; j< 3; j++) raw_w(track_data, tpos, 16, 0x4489);
|
|
||||||
mfm_w(track_data, tpos, 8, 0xfe);
|
|
||||||
mfm_w(track_data, tpos, 8, tnum ? tnum[i] : track);
|
|
||||||
mfm_w(track_data, tpos, 8, hnum ? hnum[i] : head);
|
|
||||||
mfm_w(track_data, tpos, 8, snum[i]);
|
|
||||||
mfm_w(track_data, tpos, 8, ssize);
|
|
||||||
crc = calc_crc_ccitt(track_data, cpos, tpos);
|
|
||||||
mfm_w(track_data, tpos, 16, crc);
|
|
||||||
for(int j=0; j<22; j++) mfm_w(track_data, tpos, 8, 0x4e);
|
|
||||||
|
|
||||||
if(stype == 0 || stype > 8)
|
|
||||||
for(int j=0; j<12+4+size+2+gap3; j++) mfm_w(track_data, tpos, 8, 0x4e);
|
|
||||||
|
|
||||||
else {
|
|
||||||
// sync, DAM, data and gap 3
|
|
||||||
for(int j=0; j<12; j++) mfm_w(track_data, tpos, 8, 0x00);
|
|
||||||
cpos = tpos;
|
|
||||||
for(int j=0; j< 3; j++) raw_w(track_data, tpos, 16, 0x4489);
|
|
||||||
mfm_w(track_data, tpos, 8, stype == 3 || stype == 4 || stype == 7 || stype == 8 ? 0xf8 : 0xfb);
|
|
||||||
if(stype == 2 || stype == 4 || stype == 6 || stype == 8) {
|
|
||||||
for(int j=0; j<size; j++) mfm_w(track_data, tpos, 8, img[pos]);
|
|
||||||
pos++;
|
|
||||||
} else
|
|
||||||
for(int j=0; j<size; j++) mfm_w(track_data, tpos, 8, img[pos++]);
|
|
||||||
if(stype == 5 || stype == 6 || stype == 7 || stype == 8)
|
|
||||||
crc = 0xffff^crc;
|
|
||||||
crc = calc_crc_ccitt(track_data, cpos, tpos);
|
|
||||||
mfm_w(track_data, tpos, 16, crc);
|
|
||||||
for(int j=0; j<gap3; j++) mfm_w(track_data, tpos, 8, 0x4e);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
// Gap 4b
|
|
||||||
|
|
||||||
while(tpos < cell_count-15) mfm_w(track_data, tpos, 8, 0x4e);
|
|
||||||
raw_w(track_data, tpos, cell_count-tpos, 0x9254 >> (16+tpos-cell_count));
|
|
||||||
}
|
|
||||||
|
|
||||||
generate_track_from_levels(track, head, track_data, cell_count, 0, image);
|
|
||||||
global_free(track_data);
|
|
||||||
}
|
}
|
||||||
|
|
||||||
global_free(img);
|
global_free(img);
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user