test-drb September 2007

test-drb@ccmp.vtda.org

220 participants
406 discussions

Early networking (was Re: Subject: Re: 8-bitters and multi-whatever)

by ajp166＠bellatlantic.net

> >Subject: Early networking (was Re: Subject: Re: 8-bitters and multi-whatever) > From: "Ethan Dicks" <ethan.dicks at gmail.com> > Date: Sun, 16 Sep 2007 17:34:47 -0400 > To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> > >On 9/16/07, Chuck Guzis <cclist at sydex.com> wrote: >> On 16 Sep 2007 at 13:10, ajones wrote: >> >> > Then let's go a step further. When/where did the first internetworking >> > gear come onto the market? Not multi-protocol routing, just routing in >> > general: segmented networks with nodes that moved traffic towards remote >> > nodes on the behalf of local ones. >> >> Does Usenet UUCP-type networking count? > >The routing in classic UUCP was manually done, but I would say it >counts, but then I used UUCP on a nearly daily basis from about 1985 - >1996, so I could be biased. I was a digit from '83 to 93 and was used to DECnet PhaseIV which had adaptive routing. Phase III did not. So going from a phase III node (usually PDP-11) generally required specifying the path to the first routing node. IP networking was later in my expereicnce and had it's own flavor. To answer the question, Networking gear was already around by 1980 and likely well before that. Allison

17 years, 4 months

Early networking (was Re: Subject: Re: 8-bitters and multi-whatever)

by ethan.dicks＠gmail.com

On 9/16/07, Chuck Guzis <cclist at sydex.com> wrote: > On 16 Sep 2007 at 13:10, ajones wrote: > > > Then let's go a step further. When/where did the first internetworking > > gear come onto the market? Not multi-protocol routing, just routing in > > general: segmented networks with nodes that moved traffic towards remote > > nodes on the behalf of local ones. > > Does Usenet UUCP-type networking count? The routing in classic UUCP was manually done, but I would say it counts, but then I used UUCP on a nearly daily basis from about 1985 - 1996, so I could be biased. -ethan

17 years, 4 months

Help identifying a PDP-11

by toby＠coreware.co.uk

Hi, Can anyone help me identify my latest PDP-11 rescue. Not been able to get a good look at it yet as it is in a room packed (and I mean packed) with junk. Machine consists of a DEC Datasystems cab (about 35-40U with a blue bottom panel, pretty similar to light blue cabs here: http://www.computermuseum.li/Liste/Digital/PDP11.70.4.html) I'm not familiar with the DEC Datasystems versions of PDP-11s. Does anyone have any background information on them? Also, I'm pretty sure I've not lucked out and found an 11/70 as no toggle switch console, any ideas on what other models were fitted to these cabs. I'm guessing 11/34. Machines is fantastic condition having been stored for last 30 years. Comes with 2 x RK07s (in floor standing cabs) and a tape drive. Only downside is I'm having to hire a crane to remove the machine (as its on 1st floor). Any advice on moving RK07 drives? Do I need to lock heads? Many thanks, Toby -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.

17 years, 4 months

DEC Alphaserver 1000A simm choices

by danieldsnyder＠gmail.com

I seem to recall somewhere in cctech archives having read a discussion about Alphaserver 1000A simm configuration choices. Maybe it was in a newsgroup.. The question is can I use 128M simms in a 1000A? I recall someone tried this size in a Alphastation 250 and all simms were recognised. I know 64M simms work as the SOC shows kits containing this size were available. I realize the simms are the 36 bit type. I currently use a mixture of 32M and 64M in the various banks in my 1000 and 1000A, the simms are a mixture of original DEC and HP simms. I did search the cctech archives and nothing returned. Dan Snyder

17 years, 4 months

Parts for C64 Hardware Hacking

by healyzh＠aracnet.com

Does anyone have a list out there that details what the part numbers are for the various pieces of hardware you would want to order when building stuff for the C64? As an example the Digi-Key part number for a User Port connector is EDC307240-ND. Zane -- | Zane H. Healy | UNIX Systems Administrator | | healyzh at aracnet.com (primary) | OpenVMS Enthusiast | | MONK::HEALYZH (DECnet) | Classic Computer Collector | +----------------------------------+----------------------------+ | Empire of the Petal Throne and Traveller Role Playing, | | PDP-10 Emulation and Zane's Computer Museum. | | http://www.aracnet.com/~healyzh/ |

17 years, 4 months

Kaypro movcpm.com

by ajp166＠bellatlantic.net

> >Subject: RE: Kaypro movcpm.com > From: dwight elvey <dkelvey at hotmail.com> > Date: Sat, 15 Sep 2007 06:49:28 -0700 > To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> > > >Hi > My understanding of movcpm.com is that it needs to be the >exact one that comes with that version. I beleive it has >tables of addresses to replace. Correct. there is a serial number thats easy to take care of but the real problem is that MOVCPM has to be valid for the BIOS in use. Reason is that MOVCPM is a relocator that operates by adjusting the various Jumps and Calls in the code and if the BIOS and MOVCPM do not match that reloc will make hash of the BIOS. > If you have ROMs, it is unlikely that it is a 64K CPM. One >would need to allow some space for the ROMs. It may already >be a 62K. Likely less for a lot of reasons. Roms can be mapped out of the ram map or transient. I'd bet more like 56K is the case. > You might try moving to something you know is safe like >32K. Good idea and then if you sysgen that code to a disk use a fresh disk to avoid crunching a working one. Allison

17 years, 4 months

EPROM Erasers?

by dkelvey＠hotmail.com

> From: dave06a at dunfield.com>> > I don't think it's necessary to use a conductive surface - Given that> most devices being erased are used - ie: have been inserted and removed> multiple times, it is highly unlikely that all the pins would contact> a flat conductive surface. Same for a slotted holder - unlikely that> all pins would be connected. Also, none of the data sheets I've seen on> programming mention connecting the pins together. Can anyone provide a> reference?> The conductive foam is only about static when first inserting the EPROM to the eraser. If the UV light has been on for some time, it is unlikely to have any static on surfaces exposed the the UV light. UV erases static just as it does EPROMs. For static handling precautions always make sure to touch the surface before picking up or putting down the IC. Although, it is not desired from a contamination point of view, one shouldn't touch the leads of an IC, the best Faraday shield is enclosing the IC in your fist. I've used this method for handling such sensitive parts as 4051s and 4052s. If your hands are freshly cleaned, you won't have much oil and salts on your skin. From a manufacturer point of view, one should only move an IC from point A to B in a static safe enclosure. Dwight _________________________________________________________________ Gear up for Halo? 3 with free downloads and an exclusive offer. It?s our way of saying thanks for using Windows Live?. http://gethalo3gear.com?ocid=SeptemberWLHalo3_WLHMTxt_2

17 years, 4 months

Looking for Cards

by jrkeys＠concentric.net

I just got a hand punch used with the McBee Keysort system and would like to get a couple of the punch cards used with this system. From what I have read on the Internet these were out before IBM produced punch cards but they look very much like the 80-Col cards from IBM. If anyone has some please contact me off list. Thanks John Keys

17 years, 4 months

PDP H7864 PSU schematic

by stanb＠dial.pipex.com

Hi, Does anyone know whre I can find a schematic for the above, in a Micro 11/73. Mine just went bang - very loudly! I can fix it, but it would be easier with all the data available. Google turned up a few people selling PSUs and other people looking for the schematics too, but nothing else. -- Cheers, Stan -- Cheers, Stan Barr stanb at dial.pipex.com The future was never like this!

17 years, 4 months

DG Nova 820 for trade

by iamvirtual＠gmail.com

Hi, I recently acquired a Vax-11/750, and I need to free up some space. I have a Data General Nova 820 (circa 1973) and a Diablo 30 Disk drive to trade. I do not have any cables, disk packs, documentation, etc. for the equipment. I have not tried to get the machine going. The machine is as-is, where is, in Langdon Alberta Canada (10 miles east of Calgary Alberta). I estimate the weight of the equipment to be 100 pounds or so. The Nova 820 contains the following cards: 107-000088-13 CPU1 107-000194-01 CPU2 107-000030-03 BASIC 107-000137-04 8K Memory 107-000116-07 Quad Multiplexor 107-000137-04 8K Memory 107-000137-04 8K Memory 107-000107-04 Logic Interface 107-000063-06 Basic I/O Control 107-000094-03 Disk Pack Control I am looking to trade the DG equipment for a reasonably powerful DEC/Compaq/HP Alpha server which is capable of running the latest OpenVMS and Tru64 UNIX operating systems and which has a sufficiently large quantity of memory and disk space. If interested, contact me offlist at ia35mv5i4rtu5al at gmail.com <- remove all numbers from email address I can send photos upon request. Cheers! --barrym

17 years, 4 months

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test-drb September 2007