Looking for a Depraz mouse.

[Jules Richardson]

Tony Duell wrote:
> Checking the technical manual for that machine, which includes the Depraz 
> application notes, it appears there were 2 versions. The D83/P mouse has 
> a normal quatrature output on a DE9 (yes, they got it right!) connector

Mine are both that type (quadrature), but with the same connectors as found on 
the BBC micro's User port. However, whilst they appeared originally to be 
wired to conform to that port's pinouts (i.e. no TTL outputs shorted to ground 
etc.) they weren't wired in any of the common ways of wiring mice for BBC 
machines.

I've got no idea what software they were intended to work with - or even if 
they were supposed to connect to Acorn machines at all (although I can't think 
of another contemporary system which used the same type of data input connector).

I ended up making a note of the original pinouts and swapping the pins round 
at the connector end so that they'd work with my Master 512 machines...

They're not particularly nice mice to use IMHO - but they are rather cool 
compared to the boxy alternatives around that time (although I suppose my 
Penny & Giles mouse dates from about the same time, and that one's far nicer 
than anything I've used on modern systems!)

cheers

Jules