Re: 386 12.5

Thomas Pornin (bip@nostromo.ens.fr)
Mon, 9 Jun 1997 12:16:24 +0200 (MEST)

> Anno Domini 9 Jun 97 at 10:51, Thomas Pornin wrote:
> <--snip-->
> > well, but I do not understand why it should work: the disk is an IDE,
> > 120 MB, plugged in a MFM controller; the bios supposes it is a 40 MB disk,
>
> This is impossible combination, IDE disk has single 40-pin flatcable
> MFM-disks and controllers have 2 cables, 34-pin controlcable and 20-
> pin datacable

Strangely enough, the bios is definetly positive about his controller
being a MFM/RLL one. Anyway, this would explain why the disk runs (if it
is in fact an IDE disk on an IDE controller) and why linux boots; but
I then do not understand how the bios recognizes the controller, which
it indeed does (lilo works, msdos used to work on this machine).

Also, the C/H/S trickery might be solved by the translations made by the
drive itself.

Oh well ... it works, linux is great, ip packets are routed ... what more
would one want ?

--Thomas Pornin