[sdiy] Freebass 383 ROM anyone?

Ullrich Peter Peter.Ullrich at kapsch.net
Wed Apr 13 07:23:23 CEST 2016


Ok, this sounds like bigger problems in the box...
I would first analyse all the necessary levels and signals around the microcontroller:
Power supply and ground, crystal oscillator, reset

Von: Synth-diy [synth-diy-bounces at dropmix.xs4all.nl]" im Auftrag von "Gordonjcp [gordonjcp at gjcp.net]
Gesendet: Dienstag, 12. April 2016 20:58
An: synth-diy at dropmix.xs4all.nl
Betreff: Re: [sdiy] Freebass 383 ROM anyone?

On Mon, Apr 11, 2016 at 09:23:28PM +0000, Ullrich Peter wrote:
> Hi Gordon!
> As the Freebass 383 is said to be the same as the MB33 this eprom image should work:
> http://www.mediafire.com/download/u4kkx9659e9tk6r/Freebass_MB33_OS_27C256.BIN
> Ciao
> Peter

Well, I burned a ROM and stuck it in, and it hasn't made a big difference.  It does at least trigger the envelope when I power it on now.

I guess the next thing to do is try and devise some sort of diagnostic ROM.

Gordonjcp MM0YEQ

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