I sent him a private email with a binary dump of the 8355 from my SDK-85.
It shouldn't be hard to find an Intel 8755 EPROM version of the 8355
ROM version. Then you just need to find someone to program it if you
can't program it yourself. I can program 8755 parts, but postage to
Australia might not be cheap.
-Glen
On Sat, Aug 13, 2016 at 4:15 AM, Chris Elmquist <chrise at pobox.com> wrote:
I believe I can help with this. Although I do not
have a spare device, I do have the binary as Intel hex as I had the same device fail on my
SDK-85 and went through the exercise replacing it. I'll report back off list once I
dig up the file.
Chris
On August 13, 2016 3:07:06 AM CDT, Alexis Kotlowy <thrashbarg at
kaput.homeunix.org> wrote:
Hi List,
I've started looking at my SDK-85 after having it on the shelf for
years. I know the 8355 mask ROM on it isn't working but I haven't been
able to find a suitable replacement. I wired up a temporary solution
with a 2716 EPROM only to find the ROM image and source code aren't
available outside of dead-tree format. I'm not about ready to type out
48 pages of source code. Does anyone have a digital copy of the source,
or the assembled binary or, even better, a replacement ROM?
(I'm in Adelaide, Australia.)
Cheers,
Alexis.
--
Chris Elmquist