test-drb

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101090 discussions

by jnc＠mercury.lcs.mit.edu

> From: Eugene (W2HX) > I noticed that B1J (MA7) is directly adjacent to B1K (MD4). Could this > be related? "Rule #1: There are no concidences." :-) > I have the board sitting on my table with the components facing up and > the omnibus card edge is at the bottom of the card. Going from left to > right, do I have connectors ABCD or is it something else? Maybe DCBA? I don't know Omnibus, but I expect it follows the DEC connector conventions: http://gunkies.org/wiki/DEC_card_form_factor and in that configuration, Pfrom left to right, the groups should be D to A. Generally one goes from right to left, so A to D in that direction; the pins go from A to V in that direction. Noel

8 years, 3 months

FTGH: iMac G3

by fritzm＠fritzm.org

Hey folks, Helping my ex clean out her basement, she had a 1999 tray-loading "lime" iMac G3 that she no longer wanted. The machine is complete w/ original keyboard, mouse, and power cord. Boots and runs MacOS 9.2. CRT is arcing occasionally (probably dust around the flyback?) I'm not a Mac collector, but I scooped it in case anybody here might be interested? Free for pickup in Oakland or Menlo Park CA, or for cost of shipping anywhere else. Drop me a line if interested -- otherwise it'll be off to the local ecycler in a week or two! cheers, --FritzM.

8 years, 3 months

8085 IO ports

by witchy＠binarydinosaurs.co.uk

Hi folks, STC Executel fun continues and I'm at the point where I'm fairly sure code is running but it's stuck in a tight loop waiting for something to happen. The 8085A reference tells me a non-memory I/O is signalled by IO/M going high while it puts the port number on the address bus (0xE3 to 0xE8 in this case), 8 bits on the data bus and sets S0/S1 to be WRITE. If that's the case then this machine in its current state doesn't do any non-memory I/O - IO/M is the only signal that stays low. It's not a failed CPU since I have 3 different ones and they all do this. I've pondered if one of the 3 chips the IO/M signal goes to is pulling it down; presumably I can test this by lifting the IO/M pin out of its socket then briefly touching a 1Kohm resistor connected to +5V to the 3 inputs and watch what the outputs do while the machine is running? With my little logic analyser on the address bus it's continually active so it's not a stuck bit either, at least not at the CPU. I can watch the repetitive patterns while the code runs through 3 delay loops then the patterns alter while it's off doing....something. All the 4116 RAM chips seem to be OK too. I'm also guessing things would be a lot easier if I had a memory map... Cheers! -- Adrian/Witchy Binary Dinosaurs creator/curator Www.binarydinosaurs.co.uk - the UK's biggest private home computer collection?

8 years, 3 months

Does anyone have docs for a Ventel brand MD212-plus modem?

by ethan.dicks＠gmail.com

Hi, All, A friend of mine just returned a modem he got from me decades ago, a Ventel MD212-plus. It's an early-1980s non-AT-command-set autodialling modem. The settings are adjusted via a pair of 10-pin DIP switches accessible from the back. I've checked the web and bitsavers. So far, all I've found is some old Usenet articles and a couple of pictures, but no manual or jumper guide. One "feature" is that it lacks a modular jack to plug into the phone system. Fortunately, my friend kept the proprietary DA15 cable. I've never seen that choice of connectors on any other modem. Does anyone have any Ventel docs? Thanks, -ethan

8 years, 3 months

DS12887 pcb substitute with battery

by aek＠bitsavers.org

someone just pointed this out on vcfed https://oshpark.com/shared_projects/qyNfzAMf

8 years, 3 months

Imlac PDS-1D

by sellam.ismail＠gmail.com

Hi Josh. I hope you've been well. I noticed you posted recently about have an Imlac PDS-1D. I'm curious how you came across it as there aren't many out there as you observe. I notice you're still trying to get the DPS-6 online. I'm surprised Al Kossow hasn't been able to help with the operating system software at least. Sellam

8 years, 3 months

IBM Maintenance Manuals (3203, 3704, 3803, 4341)

by thrashbarg＠kaput.homeunix.org

Hi List, I've had eleven IBM binders with maintenance information in them here for years. They're not doing anything useful so I'm inquiring here if anyone wants them. These are the labels on the spines: 3203-5 MLM , 4 TO 17 , VOLUME 02 3203-5 MLM , 18 TO 28 , VOLUME 03 3704 MLM , VOL 888 [note 1] 3704 ALD , AS CA SB , VOL 4 3704 ALD , YZ , VOL 1 3704 ALD , CC , VOL 2 3704 ALD , MX , VOL 6 3704 ALD , LB , VOL 8 3803 MLM IPC INST GUIDE [note 2] 3803 MLM TAPE SPECS [note 2] 4341 MI P.S. WIRING DIAGRAMS (YE) VOL 41 1: ALD scribbled out and MLM written under it in marker. VOL 888 in pen. 2: Written in pen Obviously not a complete set and I can't guarantee the labels match the contents, but I hope it'll help someone. I'm located in Adelaide, Australia. Feel free to contact me off-list. I can provide photos. Cheers, Alexis.

8 years, 3 months

ISO: Honeywell DPS-6 things

by michael.99.thompson＠gmail.com

> > From: jim stephens <jwsmail at jwsss.com> > Subject: Re: ISO: Honeywell DPS-6 things (Josh Dersch) > > On 1/19/2017 5:26 PM, Michael Thompson wrote: > > The RICM has a DPS-6, and another with an Ultimate label on it that may > > have a Pick processor. > I can help with this. Where is there information about this system? > thanks > Jim > There is some information here: http://www.ricomputermuseum.org/Home/equipment/honeywellultimate-level-6 -- Michael Thompson

8 years, 3 months

Sparc software on Optical media. (ebay alert)

by jwsmail＠jwsss.com

I post this not so much as an ebay to buy, though if anyplace could be found with the means to use this it is on this list. someone had an optical MO drive at some point and wrote their backup and a Solaris (probably 2.5 or later) software onto two disks. now it's a big oops if you don't have the drives. I figure someone here to pop up and point one out on ebay, or have one. Optical-Disk-128-MB-Fujifilm-230-MB-Maxell-Sparc-Software http://www.ebay.com/itm/172492434487 Just late night chuckle. Oh, he has a cheapo SS20 (compared to others), $49 bucks, but 42 shipping (if it goes that cheap). Sun-SparcStation-20-/ http://www.ebay.com/itm/172490706990 I'll be digging out an Blade 100 and 150 soon. thanks jim

8 years, 3 months

TS05AA drives?

by cclist＠sydex.com

I've been offered a DEC TS05AA drive at a pretty good price. Before I agree to the deal, I have a few questions that the DEC people can answer. 1. I understand that this drive is a rebadged Kennedy 9610. Corect? 2. The interface is supposed to be SCSI, but what kind of SCSI? 3. Do all 9610s have 800 NRZI support 4. What's your opinion of these drives in general? Thanks, Chuck

8 years, 3 months

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