Floppy disk identification algorithm
ZXNet echo conference «real.speccy»
Saturday 09 March 2002 18:18:09 Eugene Palenock -> All:
EP> We need to create an algorithm for recognizing floppy disks - ISDOS_800,
EP> ISDOS_640, TRDOS.
EP> For now I’m thinking like this:
EP> Read trk-0, sec-0
EP> At offset +10 - 3 bytes "DSK"
There is also an old format, where "DSK" is at offset +8
[ cut dick ]
[REAL ZX]
Do you know that starting from iS-DOS'98 the disk format has been changed?
On a tr-dos disk these 3 bytes can also be in the same place.
EP> How correct is this floppy disk identification algorithm?
EP> In general, it seems not reliable... How else can you do it?
No way. Install by hand. Otherwise, everything will turn out very difficult.
KF> Are you aware that starting from iS-DOS'98 the disk format has been changed?
Give the doc its format, if any...
Is it understood by the old kernel?
Does the new kernel understand the old format?
Regards, Evgeniy.
Subject, Е”.