i'm having some odd behavior on the Secondary IDE Interface I have not played around with a lot of older hardware like this in a log time so this might be normal?
or just a quirk of this motherboard?

When I plug hard drives in the primary IDE Interface the 2 hard drives detect fine and i see them in DOS i can Read and wright to them fine.
but when i plug any hard drive in the secondary IDE Interface it detect all the drives fine but when i load up dos i cant see any drives not even in Fdisk.
if i plug a CD-Rom in to the Secondary IDE Interface and I boot in to DOS it loads the drives read disks fine.
my main reason to use the Secondary IDE port going is to get a CF card working on that with rear mount CF adapter to move fines but it is not even working right with a normal Hard drive.

Note: the CF card works fine on the primary port..

My setup i am trying to do is
primary IDE Interface - Master HDD Slave CD-ROM
Secondary IDE Interface - Master on CF card

So maybe i don't have some thing setup right? whats your take on this?

https://stason.org/TULARC/pc/motherboards/F/F … 486-VIP-IO.html