Not sure when they did this, but they changed a bunch of categories
in the computers section.
So if you had saved searches, check them to make sure they are still
finding the correct things.
For instance, I had a search for dials boxes and button boxes. A new
item was listed (sgi dials box) that this search used to find, but
doesn't find anymore because the category it was searching no longer
exists.
--
"The Direct3D Graphics Pipeline" free book <http://tinyurl.com/d3d-pipeline>
The Computer Graphics Museum <http://computergraphicsmuseum.org>
The Terminals Wiki <http://terminals.classiccmp.org>
Legalize Adulthood! (my blog) <http://legalizeadulthood.wordpress.com>
The 2 HP 2100's from GovLiquidation arrived a few weeks ago in
incredible shape (after waiting some 8 weeks for DLA to decide I'm OK
to acquire a weapon system component.....) Anyway, for anyone
interested. there's another one listed - this time in Oklahoma. The
title shows it as an "HP 21005 microprogramming systems computer" but
it's clearly the HP 2100s mini in the photos!
Event ID is 10728
Item No is 1510
Unit appears in good shape and already has a heavy duty shipping carton.
Date: Tue, 1 May 2012 13:43:30 -0400 (EDT)
From: "Pete Rittwage" <peter at rittwage.com>
To: cctalk at classiccmp.org
Subject: Wanted: Apple Keyboard Encoder MM5740AA/E
Message-ID: <52999.10.2.0.194.1335894210.squirrel at rittwage.com>
Content-Type: text/plain;charset=iso-8859-1
Hi guys,
I apologize if this isn't the place for this...
These come up on eBay every so often, but they are untested or I miss
them. Does anyone have any spares of this old chip? I've got an old
Apple II that I'd like to use the regular keyboard instead of a PS/2
adapter.
I purchased some of the "C" variant (MM5740AA/C) some time back, but they
have a different key mapping than the Apple computers. If someone needs
those I can post for free or trade. I have no idea what keyboard they
were used in.
I have an MM5740AAC/N which I used to keep an industrial control
working. It hasn't been turned on in 13 years, but ought to still
be good. The key codes are in the data sheets, which ought to
still be searchable online. I made an adaptor board that plugs into
the MM5740 socket and recodes for the funny char sequence that
that particular machine used. It uses a 2732 as the code translator.
Jon
Hi guys,
I apologize if this isn't the place for this...
These come up on eBay every so often, but they are untested or I miss
them. Does anyone have any spares of this old chip? I've got an old
Apple II that I'd like to use the regular keyboard instead of a PS/2
adapter.
I purchased some of the "C" variant (MM5740AA/C) some time back, but they
have a different key mapping than the Apple computers. If someone needs
those I can post for free or trade. I have no idea what keyboard they
were used in.
-
Pete Rittwage
Augusta, GA, USA
On Mon, 30 Apr 2012 18:19:44 -0700, Eric Smith <eric at brouhaha.com> wrote:
> CRC wrote:
>> and also failed until he looked at the schematics for his unit and
>> found yet another pin out for what appeared to be a 2716 equivalent.
>> The PROMs in question are NEC2316 about which information is unobtainium.
>
> I think you're referring to the NEC ?PD2316E, which isn't a PROM. It's a
> masked ROM. NEC's masked ROM business came from their acquisition of
> Electronic Arrays, and the NEC ?PD2316E was originally the EA8316E, so
> you can find data in either an EA databook, or an early NEC databook,
> such as the 1982 NEC Catalog.
Nope - It's a windowed, ceramic chip with the markings clearly NEC2316...
->CRC
No software for a 6809??? What about FLEX and UniFLEX from TSC for an OS and Stylograph for a word processor not to mention Dynacalc for a spreadsheed and numerous BASIC's, editors, assemblers, disassemblers, diagnostic tools, etc.
I still have a 6809 system which runs FLEX with both Stylograph and Dynacalc and many other things running with two 8 inch and two 5 1/4 inch floppies just fine...
73, Chris Hausler
>> Home computing never took off until the software industry exploded.
>> There are tons of computer models like the ADAM and my Timex 2068 that
>> never went anywhere because there was little software available for the
>> masses. Plenty of people had computers before the 80's, they just tended
>> to write their own software as needed.
>
>I tend to think the lack of floppy disk with a real OS , killed the 8
>bitters
>out there. I was just looking at some old mags from the 80's,PC DOS and
>CP/M was it for general purpose OS's. I wanted to get a 6809 machine
>back then, but I could not find software to with the hardware.
>Ben.
I came across some interesting reading the other day in a library book
that I'm sorry I can't remember its name. It essentially said: Can one
subscribe to the theory that vintage computers, such as the Coleco
ADAM, went extinct because they used cassette drives where one spent
more time finding information and recording such which greatly slowed
down processing thereby defeating the purpose of electronic computing?
I?m not sure if this applied to floppy drive systems but computing
never really took off until hard drives came along in the 16-bit
world, i.e., the mid-80s! Classic computing aficionados, particularly
on this site, may have a different take on things.
Murray--
pricy, at $7,000, but for such a machine that is cheap.
HAGELIN C-362 CIPHER MACHINE
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=160783096486
May be a bit off the classic computing theme, however the deciphering
equipment is classic cmp.
thanks
Jim
On Mon, 30 Apr 2012 16:18:24 -0400, "Bill Sudbrink" <wh.sudbrink at verizon.net> wrote:
>
> Eric Smith wrote:
>> Bill Sudbrink wrote:
>>> Data sheet claims pin compatibility with 2732.
>>
>> No, the TMS2532 doesn't make any such claim.
>
> Interesting. Thanks for the correction.
>
>> It claims that it is "pin compatible with existing ROMs and
>> EPROMs (8K, 16K, 32K and 64K)", but that does not include the
>> 2732, and their reference to 32K and 64K was only in regard to
>> ROMs.
>
> So, the 2532 predates the 2732? Interesting that they revised
> the data sheet until 1982 without clearing that up.
>
>> The TMS2532 is most definitely *not* pin compatible with 2732
>
> I see that now. I must remember that data sheets are at least
> partially products of the marketing departments. Sigh...
>
> Bill S.
To totally confuse the situation, the TMS2716 in not compatible with the Intel 2716 whereas the TMS2516 is, The TMS2732 is industry standard whereas the TMS2532 is not. This goes back to the time when the industry was sorting out what was going to be standard - one should be extremely careful when choosing, changing, or programming PROMs of this vintage.
I just went through a learning process with a piece of failed HP test gear where a PROM failed. The unit had 2716 equivalents. I borrowed a friend's unit and attempted to read his PROMs and failed. An individual on the HP equipment list attempted to do the same and also failed until he looked at the schematics for his unit and found yet another pin out for what appeared to be a 2716 equivalent. The PROMs in question are NEC2316 about which information is unobtainium.
-> CRC
A while ago somebody mentioned thinking about building a
discrete transistor computer. I ran across the link again of
the one I saw (only online)
http://www.6502.org/users/dieter/mt15/mt15.htm
With all SMT, he packs the boards very closely, performance
is of course not so great with discrete junction transistors running
in saturation.
Jon
