HECnet

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15595 discussions

by hvlems＠zonnet.nl

IIRC DECnet for Netware was a separately sold item of the Pathworks product suite. It was DECnet for pc's running Netware, as basic Pathworks was DECnet for PC-DOS and MS-DOS pc's or DECnet for the Macintosh. It brought DECnet connectivity to PC's running Netware; it had support for 4 and 16 Mb/s tokenring adapters. Tokenring puts bits in a different order on the wire so AA-00 addresses became 55-00 addresses. Hans ------Origineel bericht------ Van: Cory Smelosky Afzender: owner-hecnet at Update.UU.SE Aan: hecnet at Update.UU.SE Beantwoorden: hecnet at Update.UU.SE Onderwerp: [HECnet] NetWare and DECnet Verzonden: 5 januari 2013 01:49 Hi! As I've already gotten a bunch of my NT systems on HECnet, I thought i'd try a new beast: old NetWare.

13 years, 2 months

NetWare and DECnet

by b4＠gewt.net

Hi! As I've already gotten a bunch of my NT systems on HECnet, I thought i'd try a new beast: old NetWare.

13 years, 2 months

For the Rasp-pi tinkerers...

by jg＠jordi.guillaumes.name

Al 04/01/13 18:02, En/na Mark Benson ha escrit: On 4 Jan 2013, at 00:10, Jordi Guillaumes i Pons wrote: Rasp-pi + simh + RSX + a little bit of electronics = nice light show ;) http://ancientbits.blogspot.com.es/2013/01/let-there-be-blinkenlight.html I need the details of this, I have wanted to do this for an age! I have been searching the net for almost a year looking for nice looking switches and panel mount lights to build a proper front panel. I If you can publish the info it'd be great :D Well, I'm not so ambitious :) I just want some blinking lights. Right now I have basically the "data" lights functionality. The "address" and the knobs are simh registers. I'm still working on it so I can peek at any register or address; I made that video with a very basic functionality (the LEDS are fixed on R0, since I know R0 is used for the idle loop light chasers...). The electronics part is quite easy. The base is this arduino tutorial: http://arduino.cc/en/Tutorial/ShiftOut Replacing the arduino for a Rasp-pi is not hard to do. You need the wiringPi library: https://projects.drogon.net/raspberry-pi/wiringpi/ Or you can use an Arduino instead of the Raspberry to control the LEDs (I'm working on that now). As for the software, there are two things to do: first, to control the LEDs. That is easy. Then you have to interface it into simh, and that is a little bit more difficult, even more if you haven't touched the simh code before (that is my case). I wanted to do it so it would be easy to merge with the simh head, so I have not touched the pdp11_cpu.c code. I have created a "device" and I simulate a timeout on it, so I can update the lights. Adjusting the timeout period I can regulate the sampling rate. Perhaps there is a better way to do it, but at this moment I still don't know about it. This is getting quite off-topic, so perhaps we should continue this conversation off-list. Anyway, I plan to upload the code to github as soon as it has the minimum presence so I don't get ashamed by it :-P Regarding the switches and knobs (the "input" part of the console), sincerely I have no idea about how to do it :)

13 years, 2 months

DMC11 in next simh version... looks nice, and question about TOPS-10

by Paul_Koning＠Dell.com

On Jan 2, 2013, at 4:33 PM, Jordi Guillaumes i Pons wrote: Hello, The upcoming SIMH version (4.0) comes with a virtual DMC11. It has been merged to the head branch in the git repository, so I have been playing with it a little bit. The simh team has done an aswesome work again, so kudos for Bob, Mark and all the others... It seems the DMCx are supported in pdp10, pdp11 and the VAXen. I grabbed the current code (from git) to try this on RSTS/E. Some results: 1. The stock build does not work at all (on my Mac). It never gets a boot prompt. In fact, the simulator is utterly wedged: it doesn't respond to control/E or SIGTERM. I have to "kill -9" it to make it go away. GDB shows that it's sitting on some semaphore wait. 2. If I build with NOASYNCH=1, the pdp11 simulation works. Now on to the DMC emulation... 3. The first thing RSTS does to the DMC after resetting it is to set RUN and ROMI in SEL0, with a magic value in SEL6. What that does (according to the driver comments) is to put the DMC microcontroller in a state where it executes the opcode in SEL6 every clock tick. That instruction is a "move line status register to BSEL3". The RSTS/E driver uses this to test for DSR; it takes no further startup action until DSR has been set for 2 seconds. So I added code to pdp11_dmc.c to handle this magic (it simply sets the DSR bit unconditionally if it sees ROMI and the magic opcode value). With that, RSTS/E will complete the device startup. 4. Now I see a "circuit up" message from DECnet, but that is followed by some combination of "circuit down, listener timeout" and "circuit down, unexpected packet type". After staring at packet traces ("set dmc0 debug=data") for a while, the reason is obvious: when one side of the connection is started and the other is not yet started, one side sends a packet and the other side discards that. You can't do that. DDCMP is a connection oriented protocol: if you discard a packet that's a protocol violation, and DECnet will absolutely positively get bent out of shape because it assumes the DDCMP implementation will not do such a thing. What has to be done is that a transmit remains pending if the other end is not able to receive it. That can happen because there is no connection, or because the other end hasn't turned its DMC on yet, or it's on but it currently doesn't have receive buffers. Similarly, master clear then RUN (DMC restart) needs to synchronize with the other end, to simulate the effect of the DDCMP initialization sequence. I'll take a look at how hard this would be to fix. It'll probably take a fair amount of work... paul

13 years, 2 months

For the Rasp-pi tinkerers...

by md.benson＠gmail.com

On 4 Jan 2013, at 00:10, Jordi Guillaumes i Pons wrote: Rasp-pi + simh + RSX + a little bit of electronics = nice light show ;) http://ancientbits.blogspot.com.es/2013/01/let-there-be-blinkenlight.html I need the details of this, I have wanted to do this for an age! I have been searching the net for almost a year looking for nice looking switches and panel mount lights to build a proper front panel. If you can publish the info it'd be great :D -- Mark Benson http://DECtec.info Twitter: @DECtecInfo HECnet: STAR69::MARK Online Resource & Mailing List for DEC Enthusiasts.

13 years, 2 months

For the Rasp-pi tinkerers...

by hvlems＠zonnet.nl

That's too bad! I'm working on my PPL theory exams. Not difficult but a lot of pages to read. Hans ------Origineel bericht------ Van: Jordi Guillaumes i Pons Afzender: owner-hecnet at Update.UU.SE Aan: hecnet at Update.UU.SE Beantwoorden: hecnet at Update.UU.SE Onderwerp: Re: [HECnet] For the Rasp-pi tinkerers... Verzonden: 4 januari 2013 15:25 El 04/01/2013, a les 15:20, hvlems at zonnet.nl va escriure: Jordi, are you a pilot? Hans I used to be. PPL. But I lost my medical when I was diagnosed diabetes :( Jordi Guillaumes i Pons jg at jordi.guillaumes.name HECnet: BITXOV::JGUILLAUMES

13 years, 2 months

For the Rasp-pi tinkerers...

by jg＠jordi.guillaumes.name

El 04/01/2013, a les 15:20, hvlems at zonnet.nl va escriure: Jordi, are you a pilot? Hans I used to be. PPL. But I lost my medical when I was diagnosed diabetes :( Jordi Guillaumes i Pons jg at jordi.guillaumes.name HECnet: BITXOV::JGUILLAUMES

13 years, 2 months

For the Rasp-pi tinkerers...

by hvlems＠zonnet.nl

Jordi, are you a pilot? Hans ------Origineel bericht------ Van: Jordi Guillaumes i Pons Afzender: owner-hecnet at Update.UU.SE Aan: hecnet at Update.UU.SE Beantwoorden: hecnet at Update.UU.SE Onderwerp: [HECnet] For the Rasp-pi tinkerers... Verzonden: 4 januari 2013 01:10 Rasp-pi + simh + RSX + a little bit of electronics = nice light show ;) http://ancientbits.blogspot.com.es/2013/01/let-there-be-blinkenlight.html Jordi Guillaumes i Pons jg at jordi.guillaumes.name HECnet: BITXOV::JGUILLAUMES

13 years, 2 months

Raspberry PI and PDP-11 emulation via SIMH

by jeep＠scshome.net

I did not have this issue. All I did was "apt-get install simh" and life was good! I am running the 3900 simulation (for now). I will switch over to the 11/780 later this week. -Steve -----Original Message----- From: owner-hecnet at Update.UU.SE [mailto:owner-hecnet at Update.UU.SE] On Behalf Of sampsa at mac.com Sent: Thursday, January 03, 2013 07:50 To: hecnet at Update.UU.SE Subject: Re: [HECnet] Raspberry PI and PDP-11 emulation via SIMH On 3 Jan 2013, at 04:34, Cory Smelosky <b4 at gewt.net> wrote: Either it is dated, or the raspbian repository lacks it entirely. I forget which. Dated and no ethernet. Basically do this (as root): apt-get install build-essential apt-get build-dep simh <download SIMH sources and make>

13 years, 2 months

For the Rasp-pi tinkerers...

by mcguire＠neurotica.com

On 01/03/2013 07:10 PM, Jordi Guillaumes i Pons wrote: Rasp-pi + simh + RSX + a little bit of electronics = nice light show ;) http://ancientbits.blogspot.com.es/2013/01/let-there-be-blinkenlight.html Nice! -Dave -- Dave McGuire, AK4HZ New Kensington, PA

13 years, 2 months

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