test-drb

test-drb@ccmp.vtda.org

101090 discussions

by marc.verdiell＠gmail.com

Silly question but I might as well ask. Would anyone have the cross compiler assembler for the HP 85. It was used for the development of the HP-85 ROMs, and was run on an HP 1000 (I think). - Marc On Saturday, February 21, 2015 at 13:56, Johannes Thelen wrote: > This is topic of its own, but do anyone know any 21MX assembler and > microassembler for DOS/Windows? Or have I make one..? >The RTE operating system package available here: > http://www.hpmuseum.net/display_item.php?sw=565 >...will run under SIMH on a Windows system. The (native) assembler is >preloaded on this system. >The (native) microassembler add-on package is available here: >http://www.bitsavers.org/bits/HP/HP_1000_software_collection/products/9206- 13502_Rev-2013.zip >It can be loaded and run on the above system. The assembler and >microprogramming manuals are available on Bitsavers as well. -- Dave

11 years, 5 months

ISO: Sun 386i color video/keyboard/mouse cable

by derschjo＠gmail.com

Subject line says it all... From my research this is an oddball cable with a "DB21W4" connector on one end that breaks out into 4 BNC plus a keyboard / mouse connector for the lamentable Sun 386i series (with color video). (Part number 530-1366.) I have acquired one of these machines and have an odd inclination to make it do something... anyone have one going spare? Thanks, Josh

11 years, 5 months

21MX/E FAB

by jwest＠classiccmp.org

In pouring over the documentation for the 13304A (FAB), I find one thing unclear. Is there a way to disable a given block? Empirically, it seems that if you have roms in a given block they are going to get mapped SOMEWHERE, depending on the jumpers and if you don't have roms in a given block you don't have to worry about setting jumpers to disable that block. But I was curious if there was a given jumper combination for a block to disable it - without having to pull the roms. Not a huge deal, just curious, and I don't see it in the docs. Any thoughts? Best, J

11 years, 5 months

VT101 8085 CPU Fault

by robert.jarratt＠ntlworld.com

The terminal controller board on my VT101 is not working, if it displays anything it is random characters. I have used my scope to check the 8085 CPU. It has power, it is outputting a valid clock, but there is no activity on the RD,WR and ALE pins. I am guessing the 8085 is bad, but before I go replacing it I wanted to check if anyone knew of anything else that might cause the 8085 to misbehave (ie am I seeing symptoms or a cause?). It looks to be easy to get 8085s, if I replace it I will socket it at the same time, but would rather avoid having to desolder it if the problem is elsewhere. Any advice gratefully received. Thanks Rob PS Just to check that the rest of the terminal works, I substituted the terminal controller board with one from a VT102 and it worked perfectly. So the problem is definitely on the terminal controller board.

11 years, 5 months

Comptometer

by ljw-cctech＠ljw.me.uk

Posting the message below for a non-subscriber (thanks to Bruce Damer) - please reply to Patricia Gray at the email below. And here is the Digibarn's Comptometer Page: http://www.digibarn.com/collections/calculators/comptometer/ Lawrence === I have what I think is a model J comptometer - but the red or white key in the upper right hand corner of the number keys is missing part of itself. We bought it at the San Jose Flea Market, sometime before 1987, when my husband died, but the local museum here has a bunch of them and no room for more. Thanks. Patricia Gray, Montrose Colorado pbggray at gmail.com === -- Lawrence Wilkinson lawrence at ljw.me.uk Ph 07841-048948 http://www.ljw.me.uk

11 years, 5 months

Pascal not considered harmful - was Re: Rich kids are into COBOL

by radiotest＠juno.com

At 01:07 PM 2/19/2015, Ethan Dicks wrote: >I got my start with banging hex into TIM ... I got my start punching Hollerith cards and handing in a box of them at the computer center window. :-) Dale H. Cook, Roanoke/Lynchburg, VA Osborne 1 / Kaypro 4-84 / Kaypro 1 / Amstrad PPC-640 http://plymouthcolony.net/starcity/radios/index.html

11 years, 5 months

RA81 removal

by jnc＠mercury.lcs.mit.edu

>From a while back: > From: Noel Chiappa > What's odd is that RL0x's use almost identical (maybe they are > identical) slides So I recently happened to be doing some stuff in the basement, and I compared the DEC part numbers on the RA81 slides and some RL02 slides I have, and ... they are indeed the same part number! > but on the RLOx's, there _is_ (I think) a way to take the drive out > without undoing screws; there's a little latch at the very front of the > slide, and it looks like if one trips that latch, the rail along the > side of the drive case will slide out out of the slides. I have yet to try this and see if the RL0x's will in fact slide out - does anyone happen to know if RL0x's can be slid out? > I wonder why they didn't do that on the RA8x's as well? Maybe because > those weigh so much more? Definitely a possibility, given that they are in fact the same slides. Noel

11 years, 5 months

HP 21MX Ethernet/SCSI card?

by johannesthelen＠hotmail.com

Hello! I just got HP 2109 E-series which I bought from eBay last week. I was planning to make own tape emulator interface for it, but I found mystery card from it, and it could solve some of data transfering problems... Here's pictures of it:https://drive.google.com/file/d/0B_DR111cK6W-M0FPSnR4VmRDR3M/view?usp=sh… It seems to be from 1995 what I can guess from chip date codes, but theres no any manufacturers logos. As you can see pic, there is RJ45 and SCSI connectors. Is this somekind of emulator board for disk drive..? Can it used with PC (like old NetBEUI protocol) or is this for some very-special-made-for-very-special-communication-software? Computer itself is from Navy's Radcom station (made by Grumman Aerospace Division), maybe somebody knows more of this system... - Johannes Thelen Old computer blog (Finnish) http://ennenmikrotietokoneita.blogspot.fi/Company site www.thelentech.fi

11 years, 5 months

PDP-8/M restoration project

by blstuart＠bellsouth.net

For any of you who are on more than one of these lists, I apologize in advance for your getting multiple copies of this. Now that I'm moved into the new place and the man cave (my basement) is converging on a usable state and in recognition of the upcoming 50th anniversary of the introduction of the PDP-8, I'm about to embark on a project to restore a PDP-8/M I got a while back. Unfortunately, this one is somewhat incomplete.. So I'm looking to start collecting some of the bits I'll need before it's all said and done. The items I need are in descending order of priority: KK8E M8320 Bus load module KL8E M8650 Async module H851 Inter-module jumper blocks for the CPU boards Memory Storage device and controller Power switch key One front panel switch paddle If you have any of those that you're looking to unload (especially the M8320 or the M8650), let me know. Obviously, I can live without the switch paddle and I should be able to get a new key cut, but if anyone has extras lying around, I promise to give them a good home. The truth is I don't expect to come up with memory or storage devices for what I can justify spending. However, it turns out I do have an Omnibus prototype board. So I'm planning to use that to build a device to emulate a set of RK05s using an SD card for storage, and if need be, I can put memory on there too. Thanks in advance, BLS

11 years, 5 months

VT101 8085 CPU Fault

by jnc＠mercury.lcs.mit.edu

> From: Matt Burke > You need to connect a DMM with mA (or better uA) range in series with > the bench supply and capacitor I was wondering about that - isn't the startup current, when the supply is first turned on, going to be substantial, especially with the larger caps? Any chance that could harm the DMM (or am I too used to old mechanical meters? ;-), or are they pretty well protected against over-current situations? If one does have to worry about this, is there a need for some sort of switch arrangement so that on initial power-on, there's a direct connection (supply -> cap), but once it's been on a few seconds, one can switch to route things through the DMM, to measure current with the cap mostly charged? Again, apologies for the elementary questions, but I'm not a hardware guy by trade... :-) Noel

11 years, 5 months

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