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td0_dsk: make sure header magic is same case and include cell calc from OG (nw)

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This commit is contained in:
cracyc 2013-05-23 18:41:35 +00:00
parent 05efa2f096
commit c108d5258c
2 changed files with 12 additions and 10 deletions
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1
src/emu/imagedev/floppy.h
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@ -34,6 +34,7 @@
FLOPPY_IPF_FORMAT, \
FLOPPY_MFI_FORMAT, \
FLOPPY_MFM_FORMAT, \
FLOPPY_TD0_FORMAT, \
NULL };

21
src/lib/formats/td0_dsk.c
View File

@ -779,7 +779,6 @@ FLOPPY_DESTRUCT( td0_dsk_destruct )
*********************************************************************/
#include <ctype.h>
#include "td0_dsk.h"
td0_format::td0_format()
@ -806,7 +805,7 @@ int td0_format::identify(io_generic *io, UINT32 form_factor)
UINT8 h[7];
io_generic_read(io, h, 0, 7);
if((toupper(h[0]) == 'T') && (toupper(h[1]) == 'D'))
if(((h[0] == 'T') && (h[1] == 'D')) || ((h[0] == 't') && (h[1] == 'd')))
{
return 100;
}
@ -815,7 +814,6 @@ int td0_format::identify(io_generic *io, UINT32 form_factor)
bool td0_format::load(io_generic *io, UINT32 form_factor, floppy_image *image)
{
int cell_count = 0;
int track_count = 0;
int head_count = 0;
int track_spt;
@ -853,7 +851,6 @@ bool td0_format::load(io_generic *io, UINT32 form_factor, floppy_image *image)
case 2:
if((imagebuf[offset + 2] & 0x7f) == 2) // ?
{
cell_count = 166666;
if(head_count == 2)
image->set_variant(floppy_image::DSHD);
else
@ -862,7 +859,6 @@ bool td0_format::load(io_generic *io, UINT32 form_factor, floppy_image *image)
}
/* no break; could be qd, won't know until tracks are counted */
case 1:
cell_count = 100000;
if(head_count == 2)
image->set_variant(floppy_image::DSDD);
else
@ -871,7 +867,6 @@ bool td0_format::load(io_generic *io, UINT32 form_factor, floppy_image *image)
case 4:
if((imagebuf[offset + 2] & 0x7f) == 2) // ?
{
cell_count = 200000;
if(head_count == 2)
image->set_variant(floppy_image::DSHD);
else
@ -880,10 +875,9 @@ bool td0_format::load(io_generic *io, UINT32 form_factor, floppy_image *image)
}
/* no break */
case 3:
cell_count = 100000;
if(head_count == 2)
{
if(form_factor == floppy_image::FF_525) // is this correct?
if(form_factor == floppy_image::FF_525)
image->set_variant(floppy_image::DSQD);
else
image->set_variant(floppy_image::DSDD);
@ -898,6 +892,11 @@ bool td0_format::load(io_generic *io, UINT32 form_factor, floppy_image *image)
break;
}
static const int rates[3] = { 250000, 300000, 500000 };
int rate = (header[5] & 0x7f) >= 3 ? 500000 : rates[header[5] & 0x7f];
int rpm = form_factor == floppy_image::FF_8 || (form_factor == floppy_image::FF_525 && rate >= 300000) ? 360 : 300;
int base_cell_count = rate*60/rpm;
while(track_spt != 255)
{
desc_pc_sector sects[256];
@ -986,10 +985,12 @@ bool td0_format::load(io_generic *io, UINT32 form_factor, floppy_image *image)
}
}
track_count = track;
if(fm)
build_pc_track_fm(track, head, image, cell_count, track_spt, sects, calc_default_pc_gap3_size(form_factor, sects[0].actual_size));
build_pc_track_fm(track, head, image, base_cell_count, track_spt, sects, calc_default_pc_gap3_size(form_factor, sects[0].actual_size));
else
build_pc_track_mfm(track, head, image, cell_count, track_spt, sects, calc_default_pc_gap3_size(form_factor, sects[0].actual_size));
build_pc_track_mfm(track, head, image, base_cell_count*2, track_spt, sects, calc_default_pc_gap3_size(form_factor, sects[0].actual_size));
track_spt = imagebuf[offset];
}
if((track_count > 50) && (form_factor == floppy_image::FF_525)) // ?