miller@intvax.UUCP (Dave Miller) (02/06/90)
I recently replaced my old Rev 3.9 motherboard in an A2000 with a new
Rev 6.2b motherboard in order to use my A2620 and GVP 100Mb hard card
(the old motherboard just wouldn't work properly even after making
modifications suggested by Dave Haynie - he also said the Rev. 3.9 was
a Beta Rev. and should never have been sold, although I've never had
any problems with it until now).
Having done this, the A2620 and GVP work fine on their own, but when I
add back into the system an old 2052 2Mb RAM board and an early vintage
bridgeboard XT, new problems appear.
When I just add the 2052, the system refuses to boot from the hard card,
complaining that it is not a DOS disk. If I boot from floppy, the system
comes up and recognizes the A2052, but still treats the hard card as if
it has been prepped and mounted but not formatted. The problem goes away
as soon as I remove the A2052.
When I just add the bridgeboard, the system boots OK from the hard card,
but binddrivers acts as if the bridgeboard doesn't even exist.
The 5 1/4" floppy is never accessed and the XT never boots.
I know the bridgeboard is OK and the cabling correct because I tested it
on my A2000 at work which is also an older Rev of the motherboard.
On top of that, I experience strange behaviors, such as when I open a
drawer, icons will often be displayed with the bitmaps all scrambled, and
any attempt to run DPaint sends the system out to lunch. All of this
goes away when I remove the bridgeboard.
I haven't determined yet whether the bridgeboard is incompatible with the
new motherboard, A2620, or GVP hard card.
If anyone has any suggestions as to what is going on and what might
remedy these problems, I would greatly appreciate it. I'm not terribly
concerned about getting the A2052 to work, but I really want to use my
bridgeboard and don't want to spend the bucks on a new AT version.
Thanks !
Dave Miller, Sandia Labs
Albuquerque, N.M.
miller@intvax!unmvax.cs.unm.edu