Emanuel Stiebler <emu@ecubics.com> wrote:
> anyone here has a broken KA650-BA ?
> 
> I found out that many of my problems here with my MicroVax3500 
> are based on a realy old version of the EPROMS. I don't think i could can
> an update from DEC;-((

First of all, why necessarily KA650-BA? If you are changing the ROMs anyway,
why not change it to a KA650-AA? Second, why necessarily broken? You don't have
to deprive another KA650 board of its EPROM chips in order to get a new ROM for
yours. I can temporarily pull the EPROMs out of mine, stick them in my EPROM
programmer/reader, read the contents out, post it on my FTP server, and put the
chips back. Then you or anyone else with this problem will be able to download
them, go to the nearest electronics store, buy two 27512 EPROMs, and program
them with the images from my FTP site. My KA650 happens to be a -BA, but
nothing prevents you from changing the multiuser/single-user bit in the image
before burning it.
I don't have time to do this right now, but I will in the near future. Feel
free to keep bugging me, and in fact please do so to make sure that I don't
forget. Also keep in mind that I have no idea as to what the ROM version on my
KA650 is, so it may be of no help to you. The board is currently in a drawer,
and I don't currently have a Q-bus box with a working power supply to stick it
into, so I don't have an easy way of finding this out right now.

Sincerely,
Michael Sokolov
Phone: 440-449-0299
ARPA Internet SMTP mail: sokolov@alpha.ces.cwru.edu

P.S. In case you don't remember, it has been recently talked to death on this
list that the difference between KA650-AA and KA650-BA is one bit in the EPROM
that tells DEC proprietary OSes whether you have purchased your system as
multiuser or single-user (the former being much more expensive).