OBERHEIM SYNTH

Sure sounds like Les knows what he is talking about!

Damir is in Croatia.

Charles Massey
Winter Haven FL


On Nov 16, 2007, at 12:32 PM, Les Lambert wrote:

> The Perc 1 and 2 cards are normally set to access two
> sections of the EPROM and this is detailed in the
> Prommer service manual. It's a bit tricky to decribe
> what going on with this card, but if you want a
> different output from the card, you need to move some
> hard wired jumpers and a diode or two. You can't make
> this happen accidently.
> The button to card interface is a 2 bit bus, and as
> its on adjacent pins to all the other connections to
> the card, like psu and output, you can't get a couple
> of pins wrong, it's all or nothing.
> If you plug the cards onto the wrong pins, it normally
> erases the internal memory and I think the machine
> won't run. Can't quite recall, just best avoided.
> Back when these machines were state of the art, I
> spent many months messing about with these and the
> other DMX voice cards. I still have a pile of them,
> more than one spare Perc 1 and 2 I believe. Where are
> you?
>
>