wanted: DOS 1.0 RRIOT and ROM's

From: Rob Clarke <crock_at_clarke-family.org.uk>
Date: Mon, 22 Oct 2012 00:34:14 +0200
Message-ID: <50847866.5060607@clarke-family.org.uk>
Good morning Gentlemen,

I was recently given a 2040 in really nice condition. As was the case 
with most that were in use when DOS 2.1 was released, it has had the 
ROM's and RRIOT upgraded. As I already have a pair of 4040's in good 
working order, I wanted to 'downgrade' the 2040 to it's original buggy 
incarnation. I know I could burn a pair of eproms and but the RROIT on 
an adapter board to bypass the ROM but it would be nice to have the 
original chips. I'm sure there must of been hundreds of DOS 1.0 chips 
lying unused back in the day and I wondered if any of them found there 
way into your parts drawers?

In return I would offer a corresponding set of DOS 2.1 ROMS and RRIOT or 
anything else from my parts drawers that may be of use to people.

The DOS 1.0 and 2.1 part numbers and locations on the digital board are:

Location	DOS 1.0		DOS 2.1

UL1		901468-06	901468-12
UK1		Blank		901468-11
UH1		901468-07       901468-13
UK3		901466-02	901466-04

Cheers, Rob

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Received on 2012-10-21 23:00:40

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