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15560 discussions

by evan＠snarc.net

DECheads, Just heard about the UK event, so I thought posting about a VCF East is also a good idea. :) This year's vintage Computer Festival East is April 17-19 at the InfoAge Science Center in Wall, New Jersey. The schedule is as follows: - Friday all day: technical classes. - Saturday/Sunday morning: keynotes (Wes Clark, Bob Frankston) - Saturday/Sunday all day after keynotes: exhibit hall, museum tours, consignment/vendors There's a special PDP-8 presentation Friday at lunchtime, and there's a PDP-8 pavilion in the exhibit hall Saturday and Sunday. The pavilion features 7 of our event's 36 exhibitors. Those 7 are all showing various models of the PDP-8 in honor of its 50th anniversary. David Gesswein, who you all probably know, will exhibit our club's Straight-8. It will go on display in our museum (same venue as where the show is) after the event. Full details, online ticketing, social media links, etc. are at http://www.vintage.org/2015/east/. - Evan Koblentz VCF East producer

10 years, 3 months

DEC Legacy 2015, Windermere UK, April 11/12th is just around the corner!

by robert.jarratt＠ntlworld.com

Hello Mark, The programme is looking really amazing, I am so impressed with the work you put into this part. In your talk on HECnet, it would be nice if you mentioned my user mode router, and you may also like to mention Paul Koning s Python version! Just a small correction to the exhibits. The DECstation and DECsystem I am thinking of bringing are MIPS, not Alpha. Regards Rob From: owner-hecnet at Update.UU.SE [mailto:owner-hecnet at Update.UU.SE] On Behalf Of Mark Wickens Sent: 07 March 2015 21:54 To: cctalk at classiccmp.org; hecnet at Update.UU.SE; DEC discussion list. Subject: [HECnet] DEC Legacy 2015, Windermere UK, April 11/12th is just around the corner! Sincere Greetings This is a quick email to remind you that DEC Legacy 2015 is just around the corner! I've recently updated the web page with some exciting presentations and demonstrations including the following topics: VAX MP - Simulating a SMP VAX Mark Wickens, DEC Legacy Organiser Unearthing an important historical computer at the computer sheds museum Jim Austin, The Jim Austin Computer Collection Video Presentation Bernd 'vaxman' Ulmann An Update from the Living Computer Museum Rich Alderson, Senior System Engineer The MCPRINT Utility, 30 years in the making Malcolm Blunden, retired VMS Systems Manager The Future of VMS Sue Skonetski, VP of Customer Engagement, VMS Software Getting the DEC experience on modern hardware Peter Allan, ex VAX system manager and VMS programmer HECnet - A worldwide DECnet network Mark Wickens, DEC Legacy Organiser ... and there will be more yet to come. We also now have quite an impressive list of exhibits which I expect to continue to grow throughout the next month. Whatever your favourite era of DEC kit you are sure to find something of interest. The registration page allows registration for a single day or the whole weekend. Please come, join in and experience the best computing equipment from the best manufacturer! Kind regards, Mark Wickens Event Organiser p.s. please forward this email to anyone else you think might be interested in attending!

10 years, 3 months

DEC Legacy 2015, Windermere UK, April 11/12th is just around the corner!

by gregg.drwho8＠gmail.com

Hello! Good to know. However a week later or so from your special event is ours, that's when VCF East is held at the InfoAge center in Wall Township. Want to be there Mark? ----- Gregg C Levine gregg.drwho8 at gmail.com "This signature fought the Time Wars, time and again." On Sat, Mar 7, 2015 at 4:54 PM, Mark Wickens <mark at wickensonline.co.uk> wrote: Sincere Greetings This is a quick email to remind you that DEC Legacy 2015 is just around the corner! I've recently updated the web page with some exciting presentations and demonstrations including the following topics: VAX MP - Simulating a SMP VAX Mark Wickens, DEC Legacy Organiser Unearthing an important historical computer at the computer sheds museum Jim Austin, The Jim Austin Computer Collection Video Presentation Bernd 'vaxman' Ulmann An Update from the Living Computer Museum Rich Alderson, Senior System Engineer The MCPRINT Utility, 30 years in the making Malcolm Blunden, retired VMS Systems Manager The Future of VMS Sue Skonetski, VP of Customer Engagement, VMS Software Getting the DEC experience on modern hardware Peter Allan, ex VAX system manager and VMS programmer HECnet - A worldwide DECnet network Mark Wickens, DEC Legacy Organiser ... and there will be more yet to come. We also now have quite an impressive list of exhibits which I expect to continue to grow throughout the next month. Whatever your favourite era of DEC kit you are sure to find something of interest. The registration page allows registration for a single day or the whole weekend. Please come, join in and experience the best computing equipment from the best manufacturer! Kind regards, Mark Wickens Event Organiser p.s. please forward this email to anyone else you think might be interested in attending!

10 years, 3 months

DEC Legacy 2015, Windermere UK, April 11/12th is just around the corner!

by mark＠wickensonline.co.uk

Sincere Greetings This is a quick email to remind you that DEC Legacy 2015 is just around the corner! I've recently updated the web page with some exciting presentations and demonstrations including the following topics: VAX MP - Simulating a SMP VAX Mark Wickens, DEC Legacy Organiser Unearthing an important historical computer at the computer sheds museum Jim Austin, The Jim Austin Computer Collection Video Presentation Bernd 'vaxman' Ulmann An Update from the Living Computer Museum Rich Alderson, Senior System Engineer The MCPRINT Utility, 30 years in the making Malcolm Blunden, retired VMS Systems Manager The Future of VMS Sue Skonetski, VP of Customer Engagement, VMS Software Getting the DEC experience on modern hardware Peter Allan, ex VAX system manager and VMS programmer HECnet - A worldwide DECnet network Mark Wickens, DEC Legacy Organiser ... and there will be more yet to come. We also now have quite an impressive list of exhibits which I expect to continue to grow throughout the next month. Whatever your favourite era of DEC kit you are sure to find something of interest. The registration page allows registration for a single day or the whole weekend. Please come, join in and experience the best computing equipment from the best manufacturer! Kind regards, Mark Wickens Event Organiser p.s. please forward this email to anyone else you think might be interested in attending!

10 years, 3 months

Re: [Simh] Getting rsxs to run on the pdp11 emulator

by jg＠jordi.guillaumes.name

Could it still be, like that manual suggests in section 2.2.1 on page 2-5, that it is indeed "BRUSYS Standalone Copy System and Layered Product Corrections"? I don't think so. Sounds more like someone did a backup of a just installed/booted system on tape... Oh, still haven't had much time to look at Kermit :( I'm not sure what tape image are you trying to install. Just did a quick test using this one: http://www.mirrorservice.org/sites/www.bitsavers.org/bits/DEC/pdp11/magtape… which seems to be the same you are using: $ ./pdp11 PDP-11 simulator V4.0-0 Beta git commit id: a67afa4a Disabling XQ sim> att tq BB-J0830-01.M01_RSX11M+_V4.6_1999.tap sim> b tq RSX-11M/RSX-11M-PLUS STANDALONE COPY SYSTEM V4.8 RSX-11M/RSX-11M-PLUS Standalone Configuration and Disk Sizing Program Valid switches are: /CSR=nnnnnn to change the default device CSR /VEC=nnn to change the default device vector /FOR=n to change the default magtape formatter number /DEV to list all default device CSR and vectors Enter first device: /DEV Device CSR Vector CSR Status ------ ------ ------ ---------- DB 176700 254 Present DK 177404 220 Present DL 174400 160 Present DM 177440 210 Present DP 176714 300 Present DR 176300 150 Not Present DU 172150 154 Present MM FOR=0 172440 330 Not Present MS 172522 224 Not Present MT 160000 320 Not Present MU 174500 260 Present Enter first device: MU0: Enter second device: U\U\FU\UF\DU0: Hit RETURN and enter date and time as 'TIM HH:MM MM/DD/YY' RUN BAD BAD>DU0: BAD -- DU0: Total bad blocks= 0. BAD>^Z Run BRU BRU> Simulation stopped, PC: 001344 (CLRB (R1)+) sim> att tq0 BB-J0830-01.L01_RSX11M+_V4.6_BRU_1999.tap sim> c From: BRU -- *FATAL* -- Syntax error BRU>/INIT MU0: DU0: BRU - Starting Tape 1 on MU0: BRU - End of Tape 1 on MU0: BRU - Completed BRU> Simulation stopped, PC: 001344 (CLRB (R1)+) sim> b rq RSX-11M-PLUS V4.6 BL87 1024.KW System:"Baseline" RED DU:=SY: RED DU:=LB: (...) I have stopped here, but I have got a baseline system that I should be able to SYSGEN. The SIMH configuration I have used is quite simple: $ cat pdp11.ini set cpu 11/70 set cpu 2M att rq0 RD54.000 set tm disable Those are MSCP disks and tapes, visibles from RSX as MU: and DU: The emulated tape drive is a TK50, and the disk is a RRD54.

10 years, 3 months

Fwd: [Simh] Getting rsxs to run on the pdp11 emulator

by jg＠jordi.guillaumes.name

I have been replying-to-sender instead of replying-to-list to some mails in this thread. :( Inici del missatge reenviat: Data: 3 de mar de 2015 23:40:47 CET De: Johnny Billquist <bqt at softjar.se> Per a: simh at trailing-edge.com Tema: Re: [Simh] Getting rsxs to run on the pdp11 emulator On 2015-03-03 23:32, Al Kossow wrote: the smaller bootable tape is for an rl02 RSXMPRL02 Ah! It's the RSX-11M-PLUS PREGEN system, I suspect. For people who don't know. The RSX distribution tape holds several savesets. RSX11MPBL87 is the standard baseline system. MPBL87SRC holds the sources. (Normally installed during the initial sysgen) Then comes a bunch of patches to layered products. Final saveset is RSXMPRL02, which is a pregenned system for RL02. This is especially useful if your system disk is an RL02, as you do not have enough room to run a SYSGEN on that disk, but it also saves some space and speed, since you can basically install that and start using the system without any more work. It can be customized somewhat. I have no idea what someone have gone to the effort of splitting the distribution tape up the way you people have found things. Johnny _______________________________________________ Simh mailing list Simh at trailing-edge.com http://mailman.trailing-edge.com/mailman/listinfo/simh

10 years, 3 months

Adjacency listener

by jg＠jordi.guillaumes.name

Hello, As a follow up to the discussion about the maximum number of routers in an ethernet network, I have written a stupid program which listens for DECNET hello packets and counts the number of nodes of each type. It is part of this github repo: https://github.com/jguillaumes/retroutils The project is DecnetListenerPlus, and it is meant to be opened using the NetBeans IDE (with the C/C++ plugins) but it can be built from the command line (using make/gmake). It runs under Linux (and probably under other unix-like systems) and requires root privileges. This is a (partial) output sample: Endnodes: 1, L1 routers: 0, L2 routers: 0 Endnodes: 1, L1 routers: 1, L2 routers: 0 Endnodes: 1, L1 routers: 1, L2 routers: 1 Endnodes: 2, L1 routers: 1, L2 routers: 1 Endnodes: 3, L1 routers: 1, L2 routers: 1 Endnodes: 3, L1 routers: 1, L2 routers: 2 Endnodes: 3, L1 routers: 2, L2 routers: 2 Endnodes: 3, L1 routers: 2, L2 routers: 3 Endnodes: 4, L1 routers: 2, L2 routers: 3 Endnodes: 5, L1 routers: 2, L2 routers: 3 Endnodes: 5, L1 routers: 2, L2 routers: 4 Endnodes: 6, L1 routers: 2, L2 routers: 4 Endnodes: 6, L1 routers: 3, L2 routers: 4 Endnodes: 7, L1 routers: 3, L2 routers: 4 Endnodes: 7, L1 routers: 3, L2 routers: 5 Endnodes: 8, L1 routers: 3, L2 routers: 5 Endnodes: 9, L1 routers: 3, L2 routers: 5 Endnodes: 10, L1 routers: 3, L2 routers: 5 Endnodes: 11, L1 routers: 3, L2 routers: 5 Endnodes: 12, L1 routers: 3, L2 routers: 5 Endnodes: 13, L1 routers: 3, L2 routers: 5 Endnodes: 14, L1 routers: 3, L2 routers: 5 Endnodes: 15, L1 routers: 3, L2 routers: 5 Endnodes: 16, L1 routers: 3, L2 routers: 5 Endnodes: 17, L1 routers: 3, L2 routers: 5 LEVEL 1 Routers Address: 7.61 , timer: 15 Address: 7.81 , timer: 10 Address: 19.40 , timer: 15 LEVEL 2 Routers Address: 8.400 , timer: 15 Address: 28.41 , timer: 15 Address: 42.1022, timer: 15 Address: 47.556 , timer: 15 Address: 62.637 , timer: 15 Endnodes Address: 1.21 , timer: 15 Address: 1.22 , timer: 15 Address: 1.301 , timer: 15 Address: 7.60 , timer: 15 Address: 7.70 , timer: 30 Address: 7.71 , timer: 15 Address: 7.72 , timer: 15 Address: 7.76 , timer: 15 Address: 8.401 , timer: 15 Address: 8.414 , timer: 15 Address: 8.444 , timer: 10 Address: 8.500 , timer: 10 Address: 14.1 , timer: 10 Address: 47.333 , timer: 10 Address: 47.559 , timer: 15 Address: 47.701 , timer: 15 Address: 62.5 , timer: 15

10 years, 3 months

Maximum number of L2 routers?

by Paul_Koning＠Dell.com

On Mar 2, 2015, at 10:27 AM, <Paul_Koning at Dell.com> <Paul_Koning at Dell.com> wrote: On Mar 1, 2015, at 5:50 PM, Hans Vlems <hvlems at zonnet.nl> wrote: Paul, so if more decnet routers are heard of on the land, what happens with: A) the list that gets transmitted is truncated, the 32 most recent routers and the transmitting host itself are on it? B) the locally maintained list, is that also limited to 33 entries? Almost (A) but not quite. If more than the max routers show up on the Ethernet (whatever that limit is it can be set to less than 33), the excess are dropped first based on router priority, and if it s a tie then by address (higher address wins). See section 9.1.1 in the DNA Routing spec. The adjacency that s rejected as a result is logged event 4.16, with no reason code because the Netman spec forgot to define a specific reason code for this particular case. And yes, the locally maintained list is also limited. That s critical; distributed routing protocols require that all routers agree on the routing data (after transient differences due to changes propagating have settled out). Otherwise you end up with persistent loops. So the information that s transmitted to other routers and the information used for local computation must be the same. An analogous issue appears in link state routing (Phase V and other link state protocols derived from it, like OSPF). There, it is necessary for all routers to store the same link state the same map of the area. If some don t have enough memory to do that, some serious magic is required to ensure they are handled specially, since they can t calculate correct routes if they can t store all the inputs. This is why Phase V has special rules for overloaded routers. I remember when that issue was first raised, and the brainstorming that resulted in an attempt to arrive at a solution. The current one is due to Mike Shand, as I recall, and is incredibly simple; before that one, some much more complicated approaches were concocted by other members of the team. paul

10 years, 3 months

Maximum number of L2 routers?

by Paul_Koning＠Dell.com

On Mar 1, 2015, at 5:50 PM, Hans Vlems <hvlems at zonnet.nl> wrote: Paul, so if more decnet routers are heard of on the land, what happens with: A) the list that gets transmitted is truncated, the 32 most recent routers and the transmitting host itself are on it? B) the locally maintained list, is that also limited to 33 entries? Almost (A) but not quite. If more than the max routers show up on the Ethernet (whatever that limit is it can be set to less than 33), the excess are dropped first based on router priority, and if it s a tie then by address (higher address wins). See section 9.1.1 in the DNA Routing spec. The adjacency that s rejected as a result is logged event 4.16, with no reason code because the Netman spec forgot to define a specific reason code for this particular case. paul

10 years, 3 months

Maximum number of L2 routers?

by jg＠jordi.guillaumes.name

El 01/03/15 a les 23:35, Paul_Koning at Dell.com ha escrit: Interestingly enough, the DECnet network management architecture spec says the limit is 255. 33 is correct, actually; the reason is that an Ethernet router hello message contains a list of the other routers heard by this router, and the encoding of the packet limits the length of that list to 33 entries. paul I was afraid the users of Johnny's bridge could be over that limit, since all the connected networks are -from DECNET point of view- part of the same ethernet (all the nodes are adjacent). I have taken a look at the HELLO messages I'm getting and I see just 10 routers, so we are still far away from the absolute limit, but just at the recommended maximum.

10 years, 3 months

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