Date   : Sun, 12 Feb 2006 16:21:10 -0000
From   : "Mike" <profpep@...>
Subject: Re: Basic4 r32

> Somebody is selling a job lot of them on E-Bay every week if you
> want to try one out for yourself!
>
The pictures on ebay are of a 32 pin package, thus indicating he's made the
adapter, and probably programmed them himself. The originals are a paged 28
pin ROM, like a 271001 EPROM. These are virtually uinobtainable. There is a
jig trick whereby you can mount a modern 32 pin 1Mbyte EPROM and re-load the
pages as you wish.

There is some stuff on how to do this, as well as how to patch the MOS for
Y2K at:

http://www.adsb.co.uk/bbc/bbc_master.html

If enough people were interested perhaps we could get a batch of boards
done. I first saw this trick done to replace the 27513's in some radio sets.

Here is another site showing how to add ROM and RAM:

http://homepages.tesco.net/~rainstorm/bmem.htm

Best wishes

||\/||ike