Re: [Freedos-kernel] Smaller tour of 32bit stuff in kernel, optimize, bugs

[Arkady V.B. <ar...@be...>]

Hi!

21-=E9=C0=CC-2004 20:03 _t...@dr... (tom ehlert) wrote to Eric A=
uer
<fre...@li...>:

>>   For drives beyond lastdrive, get_cds result protects from crashes,
>>   but in between, access to unformatted disks returns nonsense for
>>   int 21.36 and even crashes while trying to do critical error dialog
te> really ?
te> please provide exact code sequence where it DOES return nonsense - an=
d
te> I'll fix it. (we are talking about ke2035 !!)

     Bernd and Eric many times report, that WHICHFAT utility behaves wron=
gly
under FreeDOS. If you blindly ommit those reports, then this not close th=
e
fact, that this happens.

>> LBA_Get_Drive_Parameters should NOT disable LBA access if heads or
>>   sectors are > 64k
te> As I wrote this:

     WHEN AND WHERE?!

te>     if sectors or heads are > 64K the LBA BIOS is probably buggy.
te>     and IMO it's better to refuse to work with a buggy BIOS then to
te>     try to trash a users disk.

     Hm. May be.

>> or if totalSectHigh is nonzero.
te>     this will be relevant when disk (arrays) are larger then
te>     2 TB (not that far away)
te>     but then we good old partitioning scheme stops to make sense,
te>     and it's better not to touch these disks at all.

     But they is touched (though, through CHS).

te>     there could be some (easy) workarounds for that (my estimate less
te>     then a few hundred resident byte) + understanding dynamic disk
te>     partitioning (non resident code).
te>     until that is done it's a better idea not to touch these disks.

[...]
>>  but should be mentioned in kernel docs (<-> DEVICEHIGH/LOADHIGH).
te> which kernel docs ?

     config.txt?