Hi Eric, good question! From what I understand, he cannot boot SATA drive
because BIOS does not see SATA driver during boot prompt due to add-on
controller card. If not, then my answer was not correct.

Lukas

On Wed, Jun 23, 2021 at 8:07 PM Eric Auer <e.a...@jpberlin.de> wrote:

>
> Hi!
>
> I am not sure if we have understoood Jon's question correctly.
>
> Does he need any changes for the BIOS at all? Maybe the issue
> is simply that MS DOS can only use the first 8 GB of your disk,
> with at most 2 GB per partition, because it is FAT16 CHS only?
>
> Many old BIOSes already work fine for the first 128/137 GB if you
> have a LBA FAT32 DOS such as FreeDOS, EDR-DOS or Win98 DOS 7 :-)
>
> And as far as I have understood, he can boot either from onboard
> IDE (PATA) controllers or from his add-on SATA controller card.
>
> So I think I need to understand what exactly he can NOT do yet.
>
> Eric
> PS: Actually old PCI network cards work better than ISA ones.
>
>
>
>
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