16 Sep
2013
16 Sep
'13
6:15 a.m.
Don't you have an eprom burner? Just grab the original roms on the net
and burn it (or compare) :o)
---
Enviado do meu Motorola PT550
Meu site: http://www.tabalabs.com.br
----- Original Message -----
From: "Doug Jackson" <doug at doughq.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Sent: Sunday, September 15, 2013 11:35 PM
Subject: Re: Repairing Mac128K board - memory problems
Hi Ethan,
I have been watching the comments on the repair of this 128K board, and
was
wondering if you could help.
I also have a 128k mac here, and it is displaying a sad mac with a code
that is suggesting that the ROM has failed a checksum test. Is it
possible for you to image the Roms so I can validate mine?
Thanks.
Doug
On Sat, Sep 14, 2013 at 8:18 PM, Ethan Dicks <ethan.dicks at gmail.com>
wrote:
On Fri, Sep 13, 2013 at 4:22 PM, John Robertson
<pinball at telus.net>
wrote:
the
--
Doug Jackson
VK1ZDJ
http://www.dougswordclock.com/ -< My clocks
http://www.vk1zdj.net -< My Amateur Radio Activities ... I can
even pull the CPU and socket it so I can stick
my Fluke 9010A on the board and do some serious memory tests...
A suggestion would be to find someone with a Fluke 9100 or 9010 and has 68000 pod. This allows you to do RAM, ROM and I/O
tests from the
perspective
of the CPU.
I already have one, as I mentioned in the original post. The CPU is
not socketed,
which is a fair bit of work to change. I used to make 68000-based
devices
(COMBOARD protocol engine for PDP-11/VAX), so I'm quite familiar with how
to use it. If the CPU was socketed, I would have popped the Fluke on
there
without a second thought.
Cheers,
-ethan
P.S. - I also have a 6502 pod. I would love to pick up a Z80 pod (or an
1802 pod!) at a not-outrageous price, but that's uncommon.