> Just a quick question: Is the RAM (IC32) only used for patch storage? The actual "workspace" RAM is in the 8049 itself?
I can't answer this question as my cloned KLM-367 is using an original 8048C. But Andrew will certainly do.
--- In PolySix@yahoogroups.com, Malte Rogacki <gacki@...> wrote:
>
> > Usually the PROGRAM LEDs didn't blink like that. It only happened 3 or 4
> > times.
>
> Yes, this is also similar to the symptoms my machine exhibits.
>
> > But I've very often experienced a switch back to A1, after 2-5 minutes. The
> > alternative was three PROGRAM LEDs lit at the same time.
>
> ...and that's pretty much what my machine does all the time. Sometimes it
> takes only a few seconds, sometimes longer.
>
> I've swapped IC27 with a salvaged 4560 now. D/A calibration seems to work
> fine now but I still get the other symptoms.
>
> I've also finished a second board; so far this seems to work stable
> (although I probably should do a burn-in test before making final judgement
> about this).
>
> There are a few more observations but I want to verify them before posting
> them.
>
> Just a quick question: Is the RAM (IC32) only used for patch storage? The
> actual "workspace" RAM is in the 8049 itself?
>
> --
> Malte Rogacki
>