[sdiy] Repair help Waldorf Chord Gekko

[Ullrich Peter]

Hi!

Interesting that the newer Gekkos use PIC processors as the old Gekko Chord used a 8031 microcontroller and an external eprom...

Ciao
Peter
________________________________________
Von: synth-diy-bounces at dropmix.xs4all.nl [synth-diy-bounces at dropmix.xs4all.nl] im Auftrag von Tom Wiltshire [tom at electricdruid.net]
Gesendet: Donnerstag, 21. April 2011 19:44
An: Sam Ecoff
Cc: sdiy DIY
Betreff: Re: [sdiy] Repair help Waldorf Chord Gekko

It was my understanding that the 16C parts are one-time programmable, so if the chip is scrambled, it might stay scrambled. That said, you could probably replace it with a 16F part. On the page on Microchip's website, they suggest the PIC16F723A, but I haven't checked whether it'd be pin-for-pin compatible or if it just has the same features.

http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en010145 


HTH,
Tom

On 21 Apr 2011, at 18:00, Sam Ecoff wrote:

> Discovered today that my beloved Waldorf Chord Gekko is hosed. (It's a MIDI widget that basically adds chord memory function to any MIDI keyboard see here: http://matrixsynth.blogspot.com/2008/01/waldorf-gekko-midi-chord-memorizer.html ) I think that the PIC in it got screwed up somehow. It's a 16LC63A. I don't suppose anybody on the list can point me to someplace that might have code for this bugger?
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