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
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.
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.
There's what appears to be a very nice Olivetti Programma 101 up on
eBay, with a little over a day to go and no bids. It's in the Netherlands.
The Programma 101 was a very advanced programmable calculator,
introduced in 1965. Discrete transistors, delay-line memory, magnetic
I've exchanged a little bit of email with the seller. He says its been
in storage for a long time, and a couple of rubber belts inside have
turned gooey, but looks to be complete and in otherwise good shape.
If you want a little bit of discrete-transistor goodness, I doubt you
can find it in any smaller package than this (Ok, so a 9100A/B has both
discrete transistors *and* core memory, but the Programma 101 was
earlier.) I don't have any relation to the seller, I just decided that
I wasn't going to bid on this, so I'd make sure the list saw the listing
-- this is a very desirable machine and I figure someone, maybe one of
the UK folks, would go for it.
I've unearthed a Xerox 820-II, the original boot disk to which has gone
bad. Is there someone here who can create a copy of the original 8" boot
disk and whatever else was shipped with the Xerox 820-II? I have blanks,
but no means to write to them.
dgriffi at cs.csubak.edu
A: Because it fouls the order in which people normally read text.
Q: Why is top-posting such a bad thing?
Q: What is the most annoying thing in e-mail?
I have the following: SPARCstation 2 with GX card (1M mappable, rev 7),
SGI GDM-20E21 monitor (Trinitron, OEM from Sony) and 13w3 cable. Obviously
they don't work together - the pinouts are said to be slightly different
in SGI and Sun. Now, is there any easy way - cut some wires, connect
the others - to make this work?
If you cut off my head, what would I say? Me and my head, or me and my body?
> Just because we are on the subject already.
> What is the last version of the firmware ?
I can't remember exactly, but the 100A was definitely 4.xx series (maybe
4.12?) while the 100B was definitely 5.xx series (maybe 5.03A). I've
never seen different values on any Rainbow, though, suggesting that the
boot roms were finalized before manufacturing started and never again
updated. Could be wrong, though.
Some Rainbow's have different character set ROMs, like the Technical
Character Set ROM, but that doesn't change the firmware version on the
jba at sdf.lonestar.org
SDF Public Access UNIX System - http://sdf.lonestar.org
I've been digging through my pile of stuff again and figured that my
old HP98789A 17" (Sony) monitor might be a good match my my beige Mac
Okay, my next step is to wire up an adapter. The HP is RGB (3 BNC)
to sync-on-green. I read that the Power Macs don't support SOG, so I
need to combine both the HSYNC and VSYNC with green (a couple of
74HCxx gates should do that; I can steal power from the sync
signals). Otherwise, it's connect pin 4 to 7 (S0 to S1) on the Mac
video connector to signal that I want "RGB 1024x768".
Do I have this right? Does anyone have anything to add before I take
out my soldering iron?
What is advertised as the "granddaddy of all hamfests" is coming up, at
the end of this month, in Shelby North Carolina. I have never been to
this particular event and will likely attend this years festivities.
Does anyone else on this list plan on attending?
Has anyone attended the Shelby hamfest before?
steerex <at> ccvn <dot> com
> From: John R. Keys Jr.
> Reply To: classiccmp(a)classiccmp.org
> Sent: Friday, February 15, 2002 2:54 PM
> To: classiccmp(a)classiccmp.org
> Subject: Re-finding more items as I open boxes
> Found the following while unpacking in the warehouse:
> Took some other goodies home to play with like the 20th Annv. MAC,...
20th Anniversary Mac? You booger... I may have to grab it when
you're not looking.
--- David A Woyciesjes
--- C & IS Support Specialist
--- Yale University Press
--- (203) 432-0953
--- ICQ # - 90581
Mac OS X 10.1.2 - Darwin Kernel Version 5.2: Fri Dec 7 21:39:35 PST 2001
Running since 01/22/2002 without a crash