OldSynths

Check here for the datasheet

http://gamearchive.com/General/Data_Sheets/6809.pdf

The 6809 and 68B09 are compatible and both are
described in this document.

Eric

--- djbrow54 <davebr@...> wrote:

> I just picked up an Ensoniq Mirage for parts and
> would like to see if 
> I can coax some life out of it.  Everything appears
> dead.  Power 
> supplies are good.  I'm trying to see if the
> processor appears 
> functional.  I found one bent over pin and thought
> perhaps that was it 
> but it is still dead.
> 
> I'm having trouble finding a datasheet for a 68B09
> processor.  Does 
> anyone know where one is posted?
> 
> The G- (pin 20) of the 2732 seems to follow the
> system clock (1MHz) 
> which is screwy.  Anyone have a ecopy of the logic
> portion of this 
> part of the schematic?  I'm starting to think the
> processor may be 
> bad.  I don't want to invest in a full set of
> schematics since this 
> whole unit may be junk.  I'd like to at least see if
> the processor is 
> trying to read data from the eprom.
> 
> Dave
> 
> 
> 
> 


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