25 May
2018
25 May
'18
12:58 p.m.
Hi folks,
A friend of mine has said ADM-3A and is baffled by the tiny board it contains, not the
usual ?covering entire base? discrete logic board they normally have. Centre of this board
is the Nat Semi NS405 ?display processor on a chip? which is obviously why the board is so
small but neither of us have seen this before in a 3A.
Anyone else? Pic at http://www.binarydinosaurs.co.uk/tonyADM3a.jpg
<http://www.binarydinosaurs.co.uk/tonyADM3a.jpg>
cheers!
--
adrian/witchy
Owner of Binary Dinosaurs, the UK's biggest home computer collection?
t: @binarydinosaurs f: facebook.com/binarydinosaurs
w: www.binarydinosaurs.co.uk
25 May
25 May
2:04 p.m.
Adrian Graham via cctalk <cctalk at classiccmp.org> writes:
A friend of mine has said ADM-3A and is baffled by the
tiny board it
contains, not the usual ?covering entire base? discrete logic board
they normally have.
Here's a similar one that was on eBay a couple of years ago (the full
listing has pictures of the insides):
https://www.ebay.co.uk/itm/-/322312097162
The September 1986 date on the case of yours means that it dates from
around the time when Lear-Siegler sold their terminal business to
Zentec -- is it actually badged Lear-Siegler?
--
Adam Sampson <ats at offog.org> <http://offog.org/>
2:30 p.m.
On 25 May 2018, at 22:04, Adam Sampson via cctalk
<cctalk at classiccmp.org> wrote:
Adrian Graham via cctalk <cctalk at classiccmp.org> writes:
Wow, good spot! This one isn?t badged but we just assumed it had fallen off. Just as I?m
typing this he?s messaged me to say it?s actually the ADM-3A ?10th Anniversary edition?.
The manual is on bitsavers:
http://bitsavers.trailing-edge.com/pdf/learSiegler/ADM_3/DP2880486F_ADM3A_U…
<http://bitsavers.trailing-edge.com/pdf/learSiegler/ADM_3/DP2880486F_ADM3A_UM_Apr86.pdf>
I do love a happy ending to a search :) Cheers!
--
adrian/witchy
Owner of Binary Dinosaurs, the UK's biggest home computer collection?
t: @binarydinosaurs f: facebook.com/binarydinosaurs
w: www.binarydinosaurs.co.uk
A friend of mine has said ADM-3A and is baffled
by the tiny board it
contains, not the usual ?covering entire base? discrete logic board
they normally have.
Here's a similar one that was on eBay a couple of years ago (the full
listing has pictures of the insides):
https://www.ebay.co.uk/itm/-/322312097162
The September 1986 date on the case of yours means that it dates from
around the time when Lear-Siegler sold their terminal business to
Zentec -- is it actually badged Lear-Siegler? 
29 May
29 May
12:10 a.m.
On Fri, May 25, 2018 at 3:30 PM, Adrian Graham via cctalk <
cctalk at classiccmp.org> wrote:
Wow, good spot! This one isn?t badged but we just
assumed it had fallen
off. Just as I?m typing this he?s messaged me to say it?s actually the
ADM-3A ?10th Anniversary edition?. The manual is on bitsavers:
It might have _started_ its life as an ADM-3A 10th Anniversary Edition, but
it isn't one any more. The PCB in the photo is the Zentec ADM3 Retrofit.
3:10 p.m.
On 29 May 2018, at 08:10, Eric Smith <spacewar at
gmail.com> wrote:
On Fri, May 25, 2018 at 3:30 PM, Adrian Graham via cctalk <cctalk at classiccmp.org
<mailto:cctalk at classiccmp.org>> wrote:
Wow, good spot! This one isn?t badged but we just assumed it had fallen off. Just as I?m
typing this he?s messaged me to say it?s actually the ADM-3A ?10th Anniversary edition?.
The manual is on bitsavers:
It might have _started_ its life as an ADM-3A 10th Anniversary Edition, but it isn't
one any more. The PCB in the photo is the Zentec ADM3 Retrofit.
Ah right, that?s good to know for any troubleshooting we may need to do in the future! For
now it?s working nicely though.
Cheers,
--
adrian/witchy
Owner of Binary Dinosaurs, the UK's biggest home computer collection?
t: @binarydinosaurs f: facebook.com/binarydinosaurs
w: www.binarydinosaurs.co.uk
23 Jun
23 Jun
10:37 p.m.
On Tue, May 29, 2018 at 1:10 AM, Eric Smith <spacewar at gmail.com> wrote:
On Fri, May 25, 2018 at 3:30 PM, Adrian Graham via
cctalk <
cctalk at classiccmp.org> wrote:
I may have been completely wrong about that. When I wrote that, I wasn't
aware that Zentec bought the terminal product line from Lear Siegler in
1986, and continued making some of the terminals, including the ADM-3A,
under the Zentec name. Since the LSI ADM-3A was introduced in 1976, It's
possible that Zentec introduced the ADM-3A 10th Anniversary Edition with
the NS405-based logic board.
Eric
Wow, good spot! This one isn?t badged but we just
assumed it had fallen
off. Just as I?m typing this he?s messaged me to say it?s actually the
ADM-3A ?10th Anniversary edition?. The manual is on bitsavers:
It might have _started_ its life as an ADM-3A 10th Anniversary Edition,
but it isn't one any more. The PCB in the photo is the Zentec ADM3 Retrofit.
25 May
25 May
2:43 p.m.
Getting a prom dump would be cool.
On 5/25/18 12:58 PM, Adrian Graham via cctalk wrote:
Hi folks,
A friend of mine has said ADM-3A and is baffled by the tiny board it contains, not the
usual ?covering entire base? discrete logic board they normally have. Centre of this board
is the Nat Semi NS405 ?display processor on a chip? which is obviously why the board is so
small but neither of us have seen this before in a 3A.
Anyone else? Pic at http://www.binarydinosaurs.co.uk/tonyADM3a.jpg
<http://www.binarydinosaurs.co.uk/tonyADM3a.jpg>
cheers!
6:48 p.m.
On 05/25/2018 04:43 PM, Al Kossow via cctalk wrote:
Getting a prom dump would be cool.
Steve Ciarcia of Byte and Circuit Cellar fame made a board
using the NS405 called the Term-Mite.
I have a file that says it has a very small patch to tweak
the sync timing, and that is was disassembled by my own
disassembler. But, I don't believe it, as it has EXTENSIVE
comments, like every second line.
I no longer remember how I got this file, but I'm guessing
Steve distributed the source with the board.
How/where should I submit this? It is 24.6K
Jon
6:36 p.m.
On 05/25/2018 02:58 PM, Adrian Graham via cctalk wrote:
Hi folks,
A friend of mine has said ADM-3A and is baffled by the tiny board it contains, not the
usual ?covering entire base? discrete logic board they normally have. Centre of this board
is the Nat Semi NS405 ?display processor on a chip? which is obviously why the board is so
small but neither of us have seen this before in a 3A.
Anyone else? Pic at http://www.binarydinosaurs.co.uk/tonyADM3a.jpg
<http://www.binarydinosaurs.co.uk/tonyADM3a.jpg>
That looks a bit like a clone of the Term-Mite development
board for the NS405.
I suspect somebody just used the ADM-3A housing, monitor and
maybe power supply components
to hold their updated terminal.
Jon
29 May
29 May
12:07 a.m.
On Fri, May 25, 2018 at 1:58 PM, Adrian Graham via cctalk <
cctalk at classiccmp.org> wrote:
Hi folks,
A friend of mine has said ADM-3A and is baffled by the tiny board it
contains, not the usual ?covering entire base? discrete logic board they
normally have. Centre of this board is the Nat Semi NS405 ?display
processor on a chip? which is obviously why the board is so small but
neither of us have seen this before in a 3A.
Anyone else? Pic at http://www.binarydinosaurs.co.uk/tonyADM3a.jpg <
http://www.binarydinosaurs.co.uk/tonyADM3a.jpg>
That's the Zentec ADM3 retrofit:
http://bitsavers.trailing-edge.com/pdf/zentec/Zentec_ADM3_Retrofit/
2137
days inactive
2167
days old
10 comments
6 participants
participants (6)
-
aek＠bitsavers.org -
ats＠offog.org -
binarydinosaurs＠gmail.com -
elson＠pico-systems.com -
phil＠ultimate.com -
spacewar＠gmail.com