Solved: was: Bad Ram on Apple IIc

["Bill Garber" <willy46pa@comcast.net>]

"Bill Garber" <willy46pa@comcast.net> wrote in message
5OadncWSNc-lo9WiXTWJjQ@comcast.com">news:5OadncWSNc-lo9WiXTWJjQ@comcast.com...
>
> "Quadrajet1" <quadrajet1@aol.com> wrote in message
> 20030823232414.07238.00000350@mb-m26.aol.com">news:20030823232414.07238.00000350@mb-m26.aol.com...
> > << > "Bill Garber" <willy46pa@comcast.net> wrote in message
> > news:<ybqcnfQV8Pw-Q9qiXTWJhw@comcast.com>...
> > > > I have run 3 different tests on one of my IIc's ram and
> > > > all 3 tell me that I have bad motherboard ram, but the
> > > > self test is the only one that seems to tell where, well
> > > > it sorta does. Here is what I get, can someone decipher.
> > > >
> > > > *RAM 0 0 0 0 1 0 0 0
> >
> Thanks, but are you sure it's not the 5th from the rear? I took out a
> 4164 and piggybacked it over the chips one by one and it tested good
> when sitting on ARD3, which is 5th from the rear. I'm getting set to
> desolder that one now and try putting in another. See what happens.
> If not, then I'll try the 5th from front. Since IIc's are plentiful now, I
> can see no reason to spend too much time on this one, but it's still
> fun to mess with.

Yes, it was ARD3, the 5th chip from the rear. Replaced it
and ran the test with flying colors. Also, under the chip was
a marking on the board UF8. That binary was 8 in decimal.
A correlation to that maybe? I'd have to remove another IC
to prove it, and I'm not about to do that. Now if I can get an
EPROM programmer and make some roms for UniDisk
compatibility, and can duplicate the UniDisk controllers,
I would buy up the IIc's I can find and fix them up. I am also
in the process of devising a bracket to mount the 3.5 drive
inside the case and we can have a semi IIc+ out of them. ;-)

Bill @ GarberStreet Enterprizez };-)
Web Site - http://garberstreet.netfirms.com
Email - willy46pa@comcast.net



---
This email ain't infected, dude!

Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.512 / Virus Database: 309 - Release Date: 8/20/03