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.

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

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