12 Dec
2021
12 Dec
'21
1:27 p.m.
I'll be following your progress with interest, I just installed Coax into the walls
of my computer playhouse so I can ARCNet with my S-100 system. I have an ARCNet packet
sniffer that can be loaned out if you would find it helpful.
- Jonathan
On Sunday, December 12, 2021, 11:00:03 AM MST, <cctalk-request at
classiccmp.org> wrote:
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Today's Topics:
? 1. Cheap PDP-8 boards on eBait (Noel Chiappa)
? 2. ISO: DEC PDP-8 Data Multiplexer (DM01, etc.) (Josh Dersch)
? 3. Re: Cheap PDP-8 boards on eBait (Ethan Dicks)
? 4. Wanted: IBM PC compatible 8 or 16 bit Arcnet cards
? ? ? (Michael Brutman)
? 5. Re: Wanted: IBM PC compatible 8 or 16 bit Arcnet cards (ED SHARPE)
? 6. Re: Wanted: IBM PC compatible 8 or 16 bit Arcnet cards
? ? ? (devin davison)
----------------------------------------------------------------------
Message: 1
Date: Sat, 11 Dec 2021 13:21:25 -0500 (EST)
From: jnc at mercury.lcs.mit.edu (Noel Chiappa)
To: cctalk at classiccmp.org
Cc: jnc at mercury.lcs.mit.edu
Subject: Cheap PDP-8 boards on eBait
Message-ID: <20211211182125.6B73B18C077 at mercury.lcs.mit.edu>
This guy:
? https://www.ebay.com/sch/m.html?_ssn=jariadkin-0&_sop=10
has a couple of PDP-8 boards for sale that at the moment are going _really_ cheap.
? ? Noel
------------------------------
Message: 2
Date: Sat, 11 Dec 2021 10:30:43 -0800
From: Josh Dersch <derschjo at gmail.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
??? <cctalk at classiccmp.org>
Subject: ISO: DEC PDP-8 Data Multiplexer (DM01, etc.)
Message-ID:
??? <CADBZjLaOMYSonVTW+3_=_VFyMHsGwvPuJ_dbUW7rZ3XULBiEMQ at mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
Hey all --
Got the TC01 working the other night, after a couple weeks of debugging
(*).? I'd like to be able to have both it and the RF08 that I'm working on
connected to the 8/I and running at the same time, so I'm looking for a
DM01 Data Multiplexer.? If anyone has any leads, do let me know.
Thanks as always,
- Josh
(*) Total TC01 fault count (so far):
- Bad transistor in TU55 motor brake control (W040)
- Bad jumper solder joints in TU55 (W990)
- Timing of UTS and U+M one-shots (R303) way out of adjustment (U+M
one-shot was at 2 seconds or so...)
- Bad tape data relay (G851)
- Bad IOT decoder transistor (W103)
- Missing Diode (W113) and weak diode in Write enable selection logic
- Timing of write clock way, way out of adjustment (90Khz vs. 125Khz
expected.)
- 24 dead maintenance panel bulbs
- 2 dead TU55 bulbs (yet to be replaced)
------------------------------
Message: 3
Date: Sat, 11 Dec 2021 16:31:45 -0500
From: Ethan Dicks <ethan.dicks at gmail.com>
To: Noel Chiappa <jnc at mercury.lcs.mit.edu>,? "General Discussion:
??? On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
Subject: Re: Cheap PDP-8 boards on eBait
Message-ID:
??? <CAALmimkQcWu67RQZknQuy11akoCPOihoDtAeOOPuQX9vzHjitw at mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
On Sat, Dec 11, 2021 at 1:21 PM Noel Chiappa via cctalk
<cctalk at classiccmp.org> wrote:
This guy:
? https://www.ebay.com/sch/m.html?_ssn=jariadkin-0&_sop=10
has a couple of PDP-8 boards for sale that at the moment are going _really_ cheap.
Tap handles and DEC boards?? Odd mix.
I took a risk and bid.? I have an -8/e and -8/m to fix.
Thanks!
-ethan
------------------------------
Message: 4
Date: Sat, 11 Dec 2021 20:00:57 -0800
From: Michael Brutman <mbbrutman at brutman.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
??? <cctalk at classiccmp.org>
Subject: Wanted: IBM PC compatible 8 or 16 bit Arcnet cards
Message-ID:
??? <CA+bZ4SBQWkvsqM79EUc8QNmEZFKjgEyvp5x69_y5=vs8rAt5Fg at mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
I'm using debug logs to try to debug flow control issues when using mTCP
and a packet driver that presents itself as Ethernet but actually uses
ARCNET.? I've gotten to the point where I just want to have an Arcnet in
the house.? Especially since I might just modify mTCP to work with Arcnet
packet drivers and cards directly.
Before I get too serious with eBay, does anybody want to rehome some Arcnet
hardware?
-Mike
------------------------------
Message: 5
Date: Sun, 12 Dec 2021 04:19:06 +0000 (UTC)
From: ED SHARPE <couryhouse at aol.com>
To: cctalk at classiccmp.org, cctalk at classiccmp.org
Subject: Re: Wanted: IBM PC compatible 8 or 16 bit Arcnet cards
Message-ID: <1961633108.407863.1639282746182 at mail.yahoo.com>
Content-Type: text/plain; charset=UTF-8
I remember? you? could? get? arcnet? ?for? HP? 150? also? ?Ed#?
In a message dated 12/11/2021 9:01:15 PM US Mountain Standard Time, cctalk at
classiccmp.org writes:?
I'm using debug logs to try to debug flow control issues when using mTCPand a packet
driver that presents itself as Ethernet but actually usesARCNET.? I've gotten to the
point where I just want to have an Arcnet inthe house.? Especially since I might just
modify mTCP to work with Arcnetpacket drivers and cards directly.?Before I get too serious
with eBay, does anybody want to rehome some Arcnethardware???-Mike
------------------------------
Message: 6
Date: Sun, 12 Dec 2021 05:05:28 -0500
From: devin davison <lyokoboy0 at gmail.com>
To: Michael Brutman <mbbrutman at brutman.com>,? "General Discussion:
??? On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
Subject: Re: Wanted: IBM PC compatible 8 or 16 bit Arcnet cards
Message-ID:
??? <CAOpB=UMtSmRP8udanC31qUArs8V=djHg5bF9yWF-ZuvAW=yC1Q at mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
Greetings,
I had quite a few arcnet cards laying around a while back, I had picked up
a ton of them from the back storage of a datacenter that was clearing out
surplus equipment. I am uncertain of how many I still have in storage. How
many do you need?
If you are able to wait a couple days, I can check how many I have
remaining in storage, and I can ship them to you once found.
--Devin D.
On Sat, Dec 11, 2021 at 11:01 PM Michael Brutman via cctalk <
cctalk at classiccmp.org> wrote:
I'm using debug logs to try to debug flow control
issues when using mTCP
and a packet driver that presents itself as Ethernet but actually uses
ARCNET.? I've gotten to the point where I just want to have an Arcnet in
the house.? Especially since I might just modify mTCP to work with Arcnet
packet drivers and cards directly.
Before I get too serious with eBay, does anybody want to rehome some Arcnet
hardware?
-Mike
End of cctalk Digest, Vol 87, Issue 12
**************************************
12 Dec
12 Dec
9:28 p.m.
On Sun, Dec 12, 2021 at 4:27 PM Jonathan Haddox via cctalk
<cctalk at classiccmp.org> wrote:
I'll be following your progress with interest, I
just installed Coax into the walls of my computer playhouse so I can ARCNet with my S-100
system. I have an ARCNet packet sniffer that can be loaned out if you would find it
helpful.
Date: Sat, 11 Dec 2021 20:00:57 -0800
From: Michael Brutman <mbbrutman at brutman.com>
... I've gotten to the point where I just want to have an Arcnet in
the house.
I haven't used ARCnet since we used to use it for 4-player Doom
(especially since not everyone in the gaming group had Ethernet at
home yet and it was easy to make a passive 4-port ARCnet hub.
-ethan
13 Dec
13 Dec
12:09 p.m.
On 12/12/21 10:28 PM, Ethan Dicks via cctalk wrote:
I haven't used ARCnet since we used to use it for
4-player Doom
(especially since not everyone in the gaming group had Ethernet at
home yet and it was easy to make a passive 4-port ARCnet hub.
I find this statement interesting for a couple of different reasons:
1) Paying Doom over ARCnet. -- I don't think I realized that ARCnet
was standardized enough that normal networking applications would work
over it. -- Naivety on my part.
2) "it was easy to make a passive 4-port ARCnet hub" ... I don't know
how to respond to that with anything but curiosity and /many/ open ended
questions.
--
Grant. . . .
unix || die
1:44 p.m.
On Mon, Dec 13, 2021 at 3:09 PM Grant Taylor via cctalk
<cctalk at classiccmp.org> wrote:
On 12/12/21 10:28 PM, Ethan Dicks via cctalk wrote:
The Doom application contained a network stack that would handle the
higher layers. IIRC, you still had to load a packet driver shim, but
perhaps not. It's been a loooong time since I've done it.
But you definitely could play up to 4 players when each machine had an
ARCnet card. Ethernet cards worked too but they cost a lot more at
the time.
I haven't used ARCnet since we used to use it
for 4-player Doom
(especially since not everyone in the gaming group had Ethernet at
home yet and it was easy to make a passive 4-port ARCnet hub.
I find this statement interesting for a couple of different reasons:
1) Paying Doom over ARCnet. -- I don't think I realized that ARCnet
was standardized enough that normal networking applications would work
over it. -- Naivety on my part. 2) "it was easy to make a passive 4-port ARCnet
hub" ... I don't know
how to respond to that with anything but curiosity and /many/ open ended
questions.
https://apenwarr.ca/arcnet/howto/cabling.html
You just take 4 BNCs and 4 resistors. Tie all the grounds together
(can use a metal bar or wire or whatever) and connect one resistor to
each core and tie all 4 resistors together.
In other words, ARCnet supports a Star topology that Ethernet does
not. It's a token-passing scheme, not CSMA (collision detection).
Cheers,
-ethan
--
Grant. . . .
unix || die
14 Dec
14 Dec
5 p.m.
On 12/13/21 2:44 PM, Ethan Dicks via cctalk wrote:
The Doom application contained a network stack that
would handle the
higher layers. IIRC, you still had to load a packet driver shim,
but perhaps not. It's been a loooong time since I've done it.
I know that Doom was an IPX capable network game. It's more that I had
mis-categorized ARCnet in my head as an atypical / non-standard network.
I now know that I was incorrect in that.
But you definitely could play up to 4 players when
each machine had
an ARCnet card. Ethernet cards worked too but they cost a lot more
at the time.
https://apenwarr.ca/arcnet/howto/cabling.html
You just take 4 BNCs and 4 resistors. Tie all the grounds together
(can use a metal bar or wire or whatever) and connect one resistor
to each core and tie all 4 resistors together.
Interesting.
Thank you for elaborating.
In other words, ARCnet supports a Star topology that
Ethernet does not.
It's a token-passing scheme, not CSMA (collision detection).
ACK
--
Grant. . . .
unix || die
13 Dec
13 Dec
2:06 p.m.
For my kids and their friends I used to set up several (up to? like 5)
bare motherboards first with lantastic 2MB cards and then NE2000 10mB
compatible cards and play Doom over IPX back in the 90's.
On 12/13/2021 2:09 PM, Grant Taylor via cctalk wrote:
On 12/12/21 10:28 PM, Ethan Dicks via cctalk wrote:
I haven't used ARCnet since we used to use it
for 4-player Doom
(especially since not everyone in the gaming group had Ethernet at
home yet and it was easy to make a passive 4-port ARCnet hub.
I find this statement interesting for a couple of different reasons:
1)? Paying Doom over ARCnet.? --? I don't think I realized that ARCnet
was standardized enough that normal networking applications would work
over it.? --? Naivety on my part.
2)? "it was easy to make a passive 4-port ARCnet hub" ... I don't know
how to respond to that with anything but curiosity and /many/ open
ended questions.
2:08 p.m.
On Mon, Dec 13, 2021 at 5:06 PM Mike Katz via cctalk
<cctalk at classiccmp.org> wrote:
For my kids and their friends I used to set up several
(up to like 5)
bare motherboards first with lantastic 2MB cards and then NE2000 10mB
compatible cards and play Doom over IPX back in the 90's.
Yes. Thank you. IPX. That was the network layer.
-ethan
2:29 p.m.
For my kids
and their friends I used to set up several (up to like 5)
bare motherboards first with lantastic 2MB cards and then NE2000 10mB
compatible cards and play Doom over IPX back in the 90's.
Yes. Thank you. IPX. That was the network layer.
877
days inactive
880
days old
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