test-drb

test-drb@ccmp.vtda.org

101090 discussions

by jnc＠mercury.lcs.mit.edu

> From: Jon Elson > Gee, our 11/45 (SN343) didn't have this, as far as I know. > This sounds more like an 11/70. Similar to the 11/70 in some ways, yes (a high-speed private memory bus), but very different in others (a second UNIBUS allowing another PDP-11 access to shared memory - nothing like that on the 11/70). Like I said, this is in the 1971 11/45 Processor Handbook (which I think is the first edition; I've never seen an earlier one), so I think it's original. I guess that manual's not online; if you'd like, I can scan that diagram and put it online. Noel

11 years, 6 months

MicroVAX 2000 with Network Interfaces problems.

by mattislind＠gmail.com

I have a MicroVAX 2000 that has suffered from a leaking battery. It has been cleaned and seems to be mostly working except for the network interface. The startup reports ?? NI 0011.700E V1.1 for the network interface. The switch is set for thin ethernet, and a 50 ohm T is in the connector with two terminators. What does the failure code mean? I cannot find any document identifying different failure codes. It seems that the software finds the version so at least something is working. Anyone that has an idea what is wrong? I will try to examine the content of registers at 200E0000 and 200E0004 and also if the ROM is accessible properly at 20100000 - 2011FFFF. But other than that, what can be done?

11 years, 6 months

It's time to restore the 11/45.

by jnc＠mercury.lcs.mit.edu

> From: Jacob Ritorto > Should I eliminate all this fancy bipolar and core memory and just use > an m7891? PPS: Why bother with memory at all, at least to get the CPU running at a basic level? Use the hack that someone here (I forget who, IIRC it was Johnny B.) reported, which is that you can store really small programs in the PARs - although in the 11/45, you're restricted to instructions of the form 00xxxx! Still, that's good enough for BR, CLR, INC, etc, etc. Noel

11 years, 6 months

Weekly Classic Computer Trivia Question (20150204)

by dpi＠dustyoldcomputers.com

This time lets refer to some classic fictional computers used in movies. Everyone probably knows about the HAL 9000 used in the movie 2001 a Space Odyssey. What was the name of HAL's sister computer in the movie 2010 Odyssey two? That was a warm up question. This one should be more difficult. What was the designation of the computer in the movie WarGames and what does it mean? And finally, As silly as it was the movie Hackers referred to the mainframe computer in the movie as a Gibson. Where did the term Gibson come from? -- Doug Ingraham PDP-8 SN 1175

11 years, 6 months

Terak 8510 keyboard

by simski＠dds.nl

hey, that is good news! seems it is quite easy to emulate with this info. maybe even to adapt in software from another keyboard from the same timeframe. thanks On 04-02-15 19:10, John Foust wrote: > At 04:05 AM 2/4/2015, Simon Claessen wrote: >> we have a fine specimen with extra floppy drive in our collection, but we lack a keyboard and cables. what type of keyboard was used? I can imagine that a standard keyboard controller chip was used so maybe a hacked together setup can be produced to boot the thing (we have media) > > Google "terak.8532-2.keyboard.specs.pdf" and you'll find the specs > in the Bitsavers archive. Eight bits parallel with strobe, in short. > > - John > > -- Met vriendelijke Groet, Simon Claessen drukknop.nl

11 years, 6 months

Weekly Classic Computer Trivia Question (20150204)

by tiggerlasv＠aim.com

>> Where did the term Gibson come from? > William Gibson, who coined the term ?Cyberspace? in his story ?Burning Chrome?. World-of-Warcraft players might recognize a certain quest, called "Hacking the Wibson". No doubt a play on the above. ;-) T

11 years, 6 months

VCF East online ticketing

by evan＠snarc.net

VCF East online ticketing is up and running: http://www.vintage.org/2015/east/

11 years, 6 months

MSV11-D debugging question

by jnc＠mercury.lcs.mit.edu

Finally getting back to this: > From: Brent Hilpert >> Again, I have a sitation where a bit is stuck on, and I'm curious to >> see if anyone has any insight into which chip (of 3) might be causing >> it (in an attempt to not have to try replacing them at random :-). > (Are they 4116 memory chips in use?) Yes. > a means to isolate which of the 3 points (ICs/pins) is the problem > might (not guaranteed) be: > ... > If the state is only faulty after one of the accesses it suggests the > according mem chip is the failure point. ... distinguish the accesses > to the upper and lower bank to try to isolate when the circuit enters > the faulty state, and see whether it's common to both banks or only one. Thank you! Thank you!! Thank You!!! That worked a treat; found the bad chip first time! Thanks again! Noel

11 years, 6 months

ISA ( PC ) 8" floppy disk CONTROLLER ???

by gerardcjat＠free.fr

For an OLD PC ( ISA slot ) obviously .... Does this "beast" ever existed ?? Does anyone recall some manufacturer's name ?? Have I any chance to find one on Ebay or other at this time ?? Or is "DBIT" adapter the only way to go ? --- L'absence de virus dans ce courrier ?lectronique a ?t? v?rifi?e par le logiciel antivirus Avast. http://www.avast.com

11 years, 6 months

Terak 8510 keyboard

by simski＠dds.nl

Hello all we have a fine specimen with extra floppy drive in our collection, but we lack a keyboard and cables. what type of keyboard was used? I can imagine that a standard keyboard controller chip was used so maybe a hacked together setup can be produced to boot the thing (we have media) -- Met vriendelijke Groet, Simon Claessen hack42.nl computermuseum

11 years, 6 months

Jump to page:

2026

2025

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