2708 EPROM progreammer - old magazines designs

[M H Stein]

-----------------Original Message:
Date: Thu, 29 Mar 2007 07:48:55 +1000
From: Doug Jackson <doug at stillhq.com>
Subject: Re: 2708 EPROM progreammer - old magazines designs

John S wrote:

> > As 2708s are obsolete few moern programmers support them, apart from a few
> > that cost many $100s. So I thought why not try and build one? I've found
> > references to the following classic magazines, and I would be willing to pay
> > a small fee for photocopies or scans of the articles:
> > 
> > Program your next EROM in BASIC. Schematic for a 2708 erasable read only
> > memory reader and programmer which uses parallel IO ports to set data and
> > address. The software to drive the programmer is written in BASIC.
> > Byte - March 1978 page 84 on (main article)
> > Byte - April 1978 page 62 (Byte Bugs)
>   

I have a programmer designed by Steve Ciarcia from BYTE - It uses an 
8051AH-Basic (The 8051 with basic embedded) as the controller - and 
still works a treat - to this day. - Standalone board, interface via 
serial.  It was fun to see peoples faces when you shipped a ^C down the 
serial line, and dropped through to a READY prompt.

I can  find the doco for yo, but it is a high end solution to a simple 
problem.

Alternately, I'm more than happy to read an eprom for you, and email 
contents - I'm in Oz though.  Perhaps there is somebody in the US who 
could do the same.

Doug

-----------------Reply:

I have one of those as well; alas, it does NOT do 2708's.

To the OP:

I can scan the KB article for you, but the 2708 programmer is
intended to work with a Motorola MEK6800-D2, and consists of
nothing more than 3 transistors to switch the 27V (and a couple 
of switches and a socket for the EPROM). It's all done in software.

mike