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[MESS] ti99/geneve: Now accepts a variant of the disk format which has

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768 additional bytes at the end used as a bad sector map.
This commit is contained in:
Michael Zapf 2012-11-17 14:37:02 +00:00
parent 7fe45971e8
commit dbdc940411
1 changed files with 32 additions and 18 deletions
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14
src/lib/formats/ti99_dsk.c
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@ -12,6 +12,12 @@
* without track data. The first sector of the disk is located at the start of
* the image, while the last sector is at its end.
*
* There is also a variant of the SDF which adds three sectors at the end
* containing a map of bad sectors. This was introduced by a tool to read
* real TI floppy disks on a PC. As other emulators tolerate this additional
* bad sector map, we just check whether there are 3 more sectors and ignore
* them.
*
* The Track Dump Format is also known as pc99 (again, named after the first
* TI emulator to use this format). It is a contiguous sequence of track
* contents, containing all information including address marks and CRC, but it
@ -339,6 +345,14 @@ static int ti99_sdf_guess_geometry(floppy_image_legacy *floppy, UINT64 size,
// and assume that the VIB did not contain reliable data. For the
// ambiguous case we choose the most common format.
// Adding support for another sector image format which adds 768 bytes
// as a bad sector map
if ((file_size / 256) % 10 == 3)
{
LOG_FORMATS("Stripping map of bad sectors at image end\n");
file_size -= 768;
}
switch (file_size)
{
case 1*40*9*256: