On Saturday (08/13/2016 at 09:59AM -0700), Glen Slick wrote: > 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.
And I did same. So, he's potentially got two versions ;-) I did fix mine with an 8755. The failure mode of the 8355 was intermittent. I was able to keep it running by pressing on it and hitting it with freeze spray. I kept it alive long enough to run a little dump routine which sent the ROM contents out the serial port where I captured it. I then turned this into Intel hex and used that to program a new 8755 which replaced the 8355. Chris > On Sat, Aug 13, 2016 at 4:15 AM, Chris Elmquist <chr...@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 > > <thrashb...@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 -- Chris Elmquist
