test-drb December 2017

test-drb@ccmp.vtda.org

127 participants
147 discussions

OT: Argh--my old faithful HP16C is failing!

by cclist＠sydex.com

On 12/03/2017 10:00 AM, Tony Duell wrote: > That sounds like the original version with the separate logic module. > > I think the display is the same between the 2 versions. I am also > pretty sure the same display is used in all the old Voyagers (there > are annunciators on it that are not used on some models, but they > are still there on the display of that model). AFAIK the difference > between the models is the firmware. Please forgive the delayed response--for some reason, the CCTalk server belched up a bunch of messages dating from 30 November onward today. I've read a bit on the HPMuseum forums that indicate that early displays aren't interchangeable with later ones--the later ones apparently use a finer-pitch connector. My own HP 16C has a serial number beginning with 2228A..., which I believe puts its date of manufacture in 1982, so my fingers are crossed to see if the "old" HP12C that I picked up on eBay is even close in terms of display connections. --Chuck

6 years, 4 months

tumble tiff to pdf converter

by jwsmail＠jwsss.com

Has anyone tried to build tumble on Ubuntu 16?? I've used the libtiff, libpbm and the like that are included in the current system as installed, and there are problems now with the tumble_pbm.c code parameters (line 237 specifically). I had built up and saved a build with my own downloaded and built libtiff and libpbm, but those packages won't build anymore either. Hoping not to rathole Al maybe Eric?? someone else who is using it to convert tiff to pdfs.? I've scanned some stuff and would prefer to use the full bitsavers toolchain, as well as have notes on how to build going forward. I'll flail on it more if noone is interested, but spent enough times tonight trying to build it before asking. thanks Jim

6 years, 4 months

Restoring a VT50 (VT52 actually) .

by jnc＠mercury.lcs.mit.edu

> From: Mattis Lind > Unfortunately I am not having any lutfisk this year. The rest of the > family is not very fond of it. I"m glad to see there are _some_ non-crazy people there! :-) Anway, I can way top that - the tradition Bermudian Christmas dish is cassava pie: make that wrong (starting with raw cassava root), and it will _kill_ you! :-) (Cassava root contains a cyanide precursor. That's what cassava root is banned for human consumption in Japan. Somewhat ironic, the land of 'fugu' banning it! :-) Noel

6 years, 4 months

RL02 to PC image

by blstuart＠bellsouth.net

On Fri, 12/15/17, Ethan Dicks via cctalk <cctalk at classiccmp.org> wrote: > On Fri, Dec 15, 2017 at 1:49 PM, systems_glitch <systems.glitch at gmail.com> wrote: > > It's on my list of things to do -- you can run external clock into DL11 and > > DLV11-J style connectors, and IM6402 UARTs are supposed to go up to 2 mbit, > > so somewhere between 38400 and 2 mbit should be possible. > > A side-effect of modding the DLV11J could be high-speed TU58 emulation... The LSI-11 I had at last spring's VCFs did that with a little home-brew 6809 board I was using for TU58 emulation. I wasn't going into a DLV11 per se, but into an MXV11. I'd have to go back and look at the details to see how fast it was actually running. Somewhere in the back of my mind, I had to back off a little bit on what the hardware could do because something on the software side couldn't take it that fast. BLS

6 years, 4 months

Help Identifying Components

by shadoooo＠gmail.com

Hello, while I can confirm that the bigger black with two pins is a diode, I'm not sure what kind of diode it is, as it could be bipolar, Schottky or Zener. About the smaller black components with three pins, they could be transistor or diodes (single or double, with common cathode, common anode or series). I will try to find a correspondence for the markings, but symbols are someone strange, so a clear macro picture would be better... Andrea

6 years, 4 months

Help Identifying Components

by robert.jarratt＠ntlworld.com

I am continuing work to reverse engineer the schematic for my H7826 PSU. I have removed one of the daughter cards in order to draw its schematic, but I can't identify some of the surface mount components on it. I have posted a picture of it here: https://rjarratt.files.wordpress.com/2017/12/50-19530.jpg The ones I can't identify are: 1. The component with two wide pins that looks like an IC approximately in the middle of the board. It is marked M106 (or it might be AA106) and 91813 underneath. I think it may be a resistor, but I am not sure. 2. Just to the right of this is another much thinner two-pin component which is black on top with a kind of white notch. I have no idea at all what this is. 3. The three 3-pin black components to the left of the first component. Two of them are marked "2T L" (or is that "ZT L"?), one appears to be marked "2X I" (letter "ih", not letter "el"). I guess they are transistors, but they may not be of course, and I don't know their pinout. Any help with identifying what these are would be very helpful. Thanks Rob

6 years, 4 months

Restoring a VT50 (VT52 actually) .

by mattislind＠gmail.com

I have started to work on a getting VT50 terminal back to life. When digging into it I recognze quite immediately that someone had done a brain transplant on it. It has VT52 boards in it! Was this a usual procedure? The VT50 to VT52 shift looks like a failure of DEC at the time. So close in time. But different board sets inside. They could have designed a board with RAM upgrade possibility and just a new microprogram? Looks strange to me. When the VT52 got on the market I guess it was hard to sell any VT50s or was there a substantial price difference? Anyhow, the VT52 boards are dead. They generate the proper sync signals but there are no keyclick generated when pressing keys on the keyboard. Which is quite normal since the sync is generated by a chain of counters while the keyboard is controlled by the microprogram. The terminal uses 4 pieces of 256 by 4 bipolar PROMs for a total of 512 bytes of microprogram. Has anyone dumped the contents of these so I could verify them?

6 years, 4 months

FS: New-Old Stock S-100 Kits: Cromemco Dazzler & ZPU, IMSAI FIF-XA, PT VDM-1 & more!

by sellam.ismail＠gmail.com

Hello again, Folks! I came across a pretty amazing find in my stuff that I didn't even know I had and have no recollection from where I got them. It's a box of unbuilt S-100 board kits. Some of the kits are complete (board, parts, documentation), others might be missing the documentation or components. And then I have a bunch of bare boards, including a fair number of prototyping boards. I created an unboxing video, which can be watched here: https://www.youtube.com/watch?v=3gGgX3WPK34 Complete information including links to photos and pricing can be found here on my new dedicated S-100 sales thread on the VCFed forums: http://www.vcfed.org/forum/showthread.php?61192-Sellam-s-S-100-Hardware-Sof… Scroll down to the third post for the newly posted S-100 kits. Please inquire directly to me via e-mail for fastest results. Thanks! Sellam

6 years, 4 months

Searching for manual for ADAC 1664ATTL output pulse board

by aaron＠aaronsplace.co.uk

Does anyone have a copy of the manual for the ADAC 1664ATTL 64bit parallel I/O Q-bus card? Thanks, Aaron.

6 years, 4 months

Miss categorized DEC box on ebay

by bobalan＠sbcglobal.net

PDP 11/03? LSI-11? Maybe someone can use it. Nice blue color. https://www.ebay.com/itm/VINTAGE-DIGITAL-INSTRUMENTS-COUNTER-HG-ELEMENTS/30… Bob -- Vintage computers and electronics www.dvq.com www.tekmuseum.com www.decmuseum.org

6 years, 4 months

← Newer
1
2
3
4
5
6
7
8
...
15
Older →

Jump to page:

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

1997

test-drb December 2017