Date   : Sat, 17 Jun 2006 16:52:47 +0100
From   : Joel Rowbottom <joel@...>
Subject: Re: Watford Electronics EPROM software

At 16:43 17/06/2006, Joel Rowbottom wrote:

>Actually, to reply to my own post...

And do it again...

>>Does anyone have a ROM image of the Watford Electronics Mk2 EPROM 
>>programmer software please? It's got to be the Mk2 one, which plugs 
>>into the 1MHz bus port (the early 1984 version won't work with it). 
>>One of my Beebs has overheated and taken the EPROM with it, it seems :|
>
>...while I'm at it, can anyone confirm/deny that the Mk2 Watford 
>programmer was 21V only? It'd certainly explain why it's failing to 
>write any EPROMs and that the two or three I've tried in it have 
>reached a nice toasty temperature!

Yep, a multitester says it's 21V. Humph.

Can I ask the electronics gurus on here, is a programmer conversion 
from 21V to 12.5V as simple as putting a resistor in there, or are 
the actual electronics different please?

Cheers


jx


--
Joel Rowbottom, was-kid, geek, coder, bad penny, 'Net addict since 1991
Personal: http://www.joel.co.uk | Pics: http://photos.jml.net