--- Gunther Schadow <gunther_at_aurora.regenstrief.org> wrote:
> Hi,
>
> gee, in my zealous bargain-hunts I keep being burned.
Ow. Sorry to hear that.
> I noticed that the KFQSA was missing one socketed
> chip (approx 40 pin DIL, black right in the middle.)
A microcontroller? A T-11? It's too new for my stuff; never even
seen one. Unfortunately, the picture in the Visual Field Guide at
http://vaxarchive.org/hw/vfg/m7769b1.jpg is none too legible.
> Also, one
> of the UDA50 boards the M7.65 I think is missing a whole set
> of 10 or so socketed chips all of equal size on the side.
If I had a UDA50 at home, I'd be glad see what's socketed on it, but I
cannot. Looking a a KDA50, I see lots of AMD PROMs that resemble
what you are describing. Those may be similar in function, if not
in content -
http://vaxarchive.org/hw/vfg/m7164.jpg
> My hope is that those are ROMs that may not be needed unless
> booting from KFQSA or DEUNA is required, but that's a very
> remote hope.
Not that many ROMs. They are likely to be ROMs for the state machine
onboard the controller. Boot ROMs for the VAX live in places other
than on the peripherals, and tend to be small, both in quantity and
capacity.
You are probably hosed. :-(
> Can they be replaced? Probably makes no sense.
Yes, but finding blanks will be more hassle than finding a dead board
and scavenging them (possibly what has already happened to you). It's
worth trying to see if they work, but with missing bits, they may have
been parted out for a reason.
-ethan
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Received on Wed Apr 17 2002 - 13:18:11 BST
