test-drb

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101090 discussions

by spacewar＠gmail.com

Thanks to the source code for the MAME DTC01 DECtalk driver, which is apparently the only place there is any information on the self-test error LED codes, I determined that there was a failed HM6264LP-12 static RAM chip. The error code narrows it down to a pair, and swapping narrowed it down to a single chip. After replacement with an HM6264ALP-12, and powering up, I was delighted to hear "DECtalk version one point eight is running." At some point if I get sixteen 27128 or 27C128 EPROMs, or maybe eight 27256 or 27C256 with four jumper changes on the board, and two 82S191 or equivalent PROMs, I might upgrade it to 2.0. I've only ever seen firmware versions 1.8 and 2.0, but there are rumors of an intermediate version and a version 2.1. Does anyone have these?

9 years, 5 months

CHM

by dave.g4ugm＠gmail.com

Folks, I am going to be in San Francisco in a few weeks' time, but only for about a day and half. I could spare 2 hours at CHM but is it worth dragging myself up there on a Sunday when there are no working exhibits, and I will only have two hours. Dave.

9 years, 5 months

RX02 and RXV11 emulators

by jwsmail＠jwsss.com

I got interested in a thread which mentioned RX02 emulators by C H Dickman, and found a nice page on that, which is still live. However, one of the pages was on geocities, and though there are about 10 or 15 hits for the path below, noone had any links which i could find which hit the original project. There are a number of dead domains on both the RX01 page and elsewhere. The link below has the listings, the zip file, all captured and downloadable. http://www.chdickman.com/rx02/ https://web.archive.org/web/20090114185527/http://www.geocities.com/saipan5… http://torok.info/computing/pdp11/rx02/index.htm The Bella Torok project extended the Dickman work to use an Arduino. The design however is not minimal in terms of what you really need to do to get a working version with the Arduino. A lot of the wires are building out a board which can be had for about 5 bucks which adds a 16 character display and 4 buttons to an arduino. He also implements an SD card on the arduino, all using a lot of wiring. If one buys the Arduino, the 16x2 / button shield, and one of the generic SPI Sd cards, I suspect there is way less involved in making up the Torok version. He also has a Raspberry Pi version which might be interesting too. thanks jim

9 years, 5 months

AT&T 3b2, IBM RT, others

by jnc＠mercury.lcs.mit.edu

> From: Josh Dersch > Wish the seller would part it out (and ship). So, send the seller an eBay message saying you're interested in some of the items, and you're in contact with other collectors who are interested in other items, but: you don't want to buy the entire lot; and suggest to the seller that they will i) sell it faster, and ii) get more money in total, if they split the lot up, and are willing to ship things. (Assuming, of course, that it doesn't sell as-is.) (Speaking of getting more money, did you all see the PDP-11/34 system that included a couple of RL01's and some RM03's? It only drew a single bid, and went for $2K. I was vaguely interested in the RM03's, but didn't want to deal with the RL01's, so I didn't bid. Wonder how many others made similar calculations? And I wonder if they buyer will actually use all of it, or put part of it - perhaps the RL01's or the RM03's - in a corner to gather dust? Wuz gonna send them a message of the sort I suggested above, but it sold.) Noel

9 years, 5 months

Motorola 88000 system on Epay

by jwsmail＠jwsss.com

a bit pricy, but it seems to be able to be powered up. Looks to be 25mhz according to the boot screen. The seller has done the smoke test for the buyer, and was even going to replace a dead NVram to verify that one message about the config being bad was recoverable. 16mb ram. Seller has done some reasonable searching there won't be much available, but if one wants a 88000 system this isn't bad. Motorola-8120-MC88000-RISC-System-/ http://www.ebay.com/itm/302054107748 I've bought from this vendor, but otherwise no other affiliation. thanks Jim

9 years, 5 months

AT&T 3b2, IBM RT, others

by seefriek＠gmail.com

I'd really like the AT&T 4425 terminal, which doesn't seem to have been claimed. I spent a couple of years with one on my desk. Any chance they'd ship? My wife and I have an agreement that if I bring home any more VME kit I have to get rid of an equivalent tonnage of other things. So unless that Motorola tower is an 88200 or something suitable esoteric, I probably need to pass. The E&S box looks like a Sun 3/110 or 4/110 with additional boards. I'd love to have one. Obviously, I would have killed for the Explorer or the RTs. Double kill for the 5620. Good they've found homes. KJ

9 years, 5 months

CHM

by couryhouse＠aol.com

Anytime you see something you have not seen before... it is worthwhile............ ? ed# Sent from my Verizon, Samsung Galaxy smartphone -------- Original message -------- From: Dave Wade <dave.g4ugm at gmail.com> Date: 8/29/16 12:11 (GMT-07:00) To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Subject: CHM Folks, I am going to be in San Francisco in a few weeks' time, but only for about a day and half. I could spare 2 hours at CHM but is it worth dragging myself up there on a Sunday when there are no working exhibits, and I will only have two hours. Dave.

9 years, 5 months

Looking for AT&T WE DSP16A development tools (DOS) and manuals

by jgevaryahu＠gmail.com

Does anyone have a copy of the AT&T/WE DSP16A development tools (assembler, etc) for DOS, and the devkit manual? The actual DSP datasheets and architecture manuals are on bitsavers (oddly, not in the same directory, which was confusing to find): http://bitsavers.trailing-edge.com/pdf/att/dsp/WE_DSP16A_Digital_Signal_Pro… http://bitsavers.trailing-edge.com/pdf/att/dsp/WE_DSP16A_data_sheet_addendu… http://bitsavers.trailing-edge.com/pdf/westernElectric/WE_DSP-16_DSP_Inform… But I'm looking for the actual assembler utility or devkit itself, which are listed (as DSP16A-*) on page 2-3 (pdf page 10) of http://bitsavers.trailing-edge.com/pdf/att/_dataBooks/1995_ATT_Product_Sele… Does anyone have a copy of this, or know someone who has it? -- Jonathan Gevaryahu jgevaryahu at gmail.com jgevaryahu at hotmail.com

9 years, 5 months

DEC Pro 350/380 Memory Cards - Interchangeability?

by shadoooo＠gmail.com

Hello Rob, I think I found a link: http://vaxhaven.com/images/a/a7/EK-PC380-PS-003.pdf Andrea

9 years, 5 months

cctalk Digest, Vol 26, Issue 29

by anders.k.nelson＠gmail.com

Hey Rob (and anyone else sniffing signals), I've been using a USB logic analyzer from Saleae (https://www.saleae.com/) for years now and the software is really good. Way cheaper than a standalone unit. I'm unsure if the inputs can handle more than 5v but you could throw a divider network in front and try it. Also there's the Digilent Analog Discovery ( https://www.sparkfun.com/products/13929) which does the same stuff but I can't vouch for the software as I've never used it. Inputs can handle +/-20v apparently. =] -- Anders Nelson +1 (517) 775-6129 www.erogear.com > ---------- Forwarded message ---------- > From: Rob Jarratt <robert.jarratt at ntlworld.com> > To: "'Paul Koning'" <paulkoning at comcast.net>, <rob at jarratt.me.uk>, > "'General Discussion: On-Topic and Off-Topic Posts'" < > cctalk at classiccmp.org> > Cc: > Date: Mon, 29 Aug 2016 17:33:56 +0100 > Subject: RE: DEC Pro 350/380 Memory Cards - Interchangeability? > > > > -----Original Message----- > > From: Paul Koning [mailto:paulkoning at comcast.net] > > Sent: 29 August 2016 15:08 > > To: rob at jarratt.me.uk; General Discussion: On-Topic and Off-Topic Posts > > <cctalk at classiccmp.org> > > Subject: Re: DEC Pro 350/380 Memory Cards - Interchangeability? > > > > > > > On Aug 28, 2016, at 5:11 PM, Rob Jarratt <robert.jarratt at ntlworld.com> > > wrote: > > > > > > I have a 350 and 380. Neither work. The 380 is reporting a possible > > > memory error on the LEDs. Will the 350's memory work in a 380 (or vice > > versa)? > > > > The 380 has memory on the motherboard, and a model-specific > > daughtercard for expansion memory. > > > > It seems reasonable that the Pro bus (I/O card) expansion memory should > > work in both models, but I don't have any to try that. > > > > If you have a 380 complaining about memory and it has a Pro bus memory > > card installed, I'd suggest removing that card to see if it's happy with > just the > > stock motherboard memory. > > > > paul > > Just reading your reply again. Are you saying it has enough memory on the > board, without using a daughter board? I did see lots of memory on the main > board, but assumed it was video memory. I did try removing the daughter > board altogether at one point, but it still didn't work. :-( > > I wish I had a logic analyser. > > Regards > > Rob >

9 years, 5 months

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