Archive of the former Yahoo!Groups mailing list: Discussion about the Korg PolySix synthesizer

All the patches are the same on boot up. I haven't bothered sticking
a battery in this one because the problem exists where it simply won't
save patches when it's powered up even. hmmm.... now I know on other
units I've done it without the battery. I don't think a local
capacitance is required from the battery... but anyway basically it
will edit everything fine. I've calibrated reset and dac. All good
there.

But once you hit write with memory protect off, the light flashes and
you select a location and the light stops blinking. Great. All
normal. But as soon as you select another patch and come back it's GONE!

Now..I assume that the patch buffer on these things is the 64 byte of
RAM in the CPU? Does anyone know for sure?

The data lines are hooked straight to the cpu of course. There are
4042 f/f latches separating most of the address lines from the buss
and two of them go direct to the cpu. Clock gets about a 167hz 30%
duty cycle waveform or so on the 4042 and all of the lines show data
moving on them just fine..... and the WE and CE move when you
initiate a write!

I haven't checked the sync on those signals yet but I thought I'd stop
for the night and just see if anyone has seen this peculiar problem.
OH and I did install new memory chips...went through all three I got
off ebay and none worked any better. Also replaced one of the 4042's
to no avail. Not a single parameter changes anything when its' saved!