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In <1991Jun20.152024.26838@midway.uchicago.edu> ace3@quads.uchicago.edu (anibal antonio acero) writes:

>My RLL hard disk controller doesn't have a ROM, and my AT's BIOS doesn't
>know about my Seagate 277R hard disk.  Am I stuck with DOS 3.3/Disk Manager
>if I don't want to give up my 65 MB hard disk?

>Thanks for any help,
>Tony Acero
>ace3@quads.uchicago.edu

If you have access to an EPROM programmer, you can patch your BIOS to include
the disk parameters. Select two parameter sets in the BIOS. Increment the
values of one of these to match your disk parameters and dekrement the other
set to the same amount. This is because most BIOS have a checksum over the 
disk param table. To find the table is a bit of debug work. I remember the
table is located usually at the same spot (where IBM put it in their original
BIOS), but I forgot the address.
Another possibility: often modern BIOS have the entry 47, which is programmable
by the setup. This is of course only possible if you have not already another
disk parameter set allocated to it.

Hope this helps

Holger

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