test-drb June 2005

test-drb@ccmp.vtda.org

221 participants
681 discussions

Rescue of data from Pioneer 10 & 11 tapes at JPL needed. Vintagecomputers slated for demolition.

by dwight.elvey＠amd.com

>From: "Nico de Jong" <nico at FARUMDATA.DK> >Subject: Rescue of data from Pioneer 10 & 11 tapes at JPL needed. > > >> Unfortunately, this data is stored on hundreds of ancient >> nine-track tapes >> Are there any list members interested in assisting in the transfer >> of this data to "more modern media"? > >Yep, I make my living from projects like that. >It will not be a problem to copy the data; but I dont have the foggiest idea >whether the data is "decodeable". The best way to save the data, is to get a >copy of the program which wrote the data in the first place. I have the >funny feeling that the data is written in _huge_ blocks. > >Nico Hi Two things needed, a tape drive and something to interpret the data. Many times, important information about the data is external to the recorded data on the tape. Like pdf or zip files, I suspect that some pieces may be missing to recover the information. I doubt that the major issue is the obsolete computer. Those doing archives might take note! Dwight

19 years, 6 months

MITS 8800B CPU Board Info

by river＠zip.com.au

Hi, I've got an old MITS 8800B CPU (Rev 0) board. It's in a pretty sad state and missing some chips and most of the voltage regulation components. Although I've seen a few pics on the net of this board, none are clear enough to read the chips. If anyone has one of these boards can you pls tell me what chip D, F and K are. I think D is an 8216, and F is an 8224 clock chip, but would like confirmation. A circuit diagram would be brilliant, if anyone has one. I'd like to get this poor old board looking nice and running. rgds river

19 years, 6 months

PC RT boards

by aw288＠osfn.org

I recently got a bunch of tower RTs (6150s, I think), and after putting together a good one, I have a few extra parts. (3) 61X6811 Ethernet Cards (1) 08F3149 Extended ESDI Adapter (2) 00F2353 Mystery Adapter Cheap! Cheap! William Donzelli aw288 at osfn.org

19 years, 6 months

S100 PROM boards

by Richard.Cini＠wachovia.com

All: With my two new machines I want to get a PROM monitor in them so I can start really playing around with them. I have a single Vector RAM/PROM III board, which uses 2704 or 2708 EPROMS. Most of the chips I have are 2732 or larger. Before I go slogging through the manual to try to hammer a 4k chip into a 1k socket, does anyone have any experience making this mod? Alternatively, can someone recommend a good general PROM board that can use larger EPROMS (programming feature not necessary). Thanks. Rich

19 years, 6 months

Data formats was Re: Rescue of data from Pioneer 10 & 11 tapes atJPL needed.Vintagecomputers slated for demolition.

by dwight.elvey＠amd.com

>From: "Fred Cisin" <cisin at xenosoft.com> > >A REAL programmer can write a FORTRAN program in any language. And some can even write COBAL in any language. We have a few working here :( Dwight

19 years, 6 months

S100 PROM boards

by dave04a＠dunfield.com

>> With my two new machines I want to get a PROM monitor in them so >>I can start really playing around with them. I have a single Vector RAM/PROM >>III board, which uses 2704 or 2708 EPROMS. Most of the chips I have are 2732 >>or larger. >> >> Before I go slogging through the manual to try to hammer a 4k >>chip into a 1k socket, does anyone have any experience making this mod? >>Alternatively, can someone recommend a good general PROM board that can use >>larger EPROMS (programming feature not necessary). > > >I'd build a board, it's fairly trivial. Compared to the mods needed to >make a 2708 board take 2732s. There is one easy way and thats to make >a header that takes the 2732 and maps the Data/Address/CS-/OE- pins >to the 2708 socket along with power and ground. That will allow only >using 1k of the 2732 but that may be all you need. the upside is one >2732 can hole 4 1k programs and it's easier to program than 2708. I agree with Allison, It's pretty easy to make a board. Another option might be to make a daughter card which not only adapts the 2732 (or bigger) to the 2708 socket, but also takes a couple of extra address lines and the select via taps to other locations on the board. I don't have the schematic for this particular board in front of me, however if it takes multiple 2708 EPROMs, the there likely is a decoder which has a select generated by the board address range, and the next few higher address lines to determine which EPROM device to enable. By ignoring the chip select at the 2708 socket, and taking it from the input to the decoder along with a couple of extra address lines, then you can fit a larger device on a small daughter board without having to hack the board (worst you will have to do is tack onto some signals). I have a couple of different 8080 monitors that might be of use to you. I have a <500 byte very basic monitor, which has the advantage that it requires NO RAM (not even for a stack) - it provides basic dump/edit memory, execute and loop read/write commands (handy for hardware debugging). I also have a 3.5K full 8080 debug monitor, which features memory dump/disassemble/edit/fill/copy, register dump/edit, In/Out, execute, single-step, breakpoints and a bunch of other goodies. I'll be happy to send them to you. I can also give you LOTS of other original 8080 CODE (Disk OS, BASIC, editor, assembler etc.) Regards, Dave -- dave04a (at) Dave Dunfield dunfield (dot) Firmware development services & tools: www.dunfield.com com Collector of vintage computing equipment: http://www.parse.com/~ddunfield/museum/index.html

19 years, 6 months

A classic present - the "Instructo Paper Computer"

by ethan.dicks＠gmail.com

One of my co-workers just dropped off a fun little thing at my desk - a McGraw-Hill publication from 1979, the "Instructo Paper Computer"... it's like the Bell Labs Cardiac. I'd never heard of the Instructo before. Digging around on the 'net only found this... http://www.computermuseumgroningen.nl/mcgrawhill/ipc.html (is Allard Shaap here on the list?) In case this spawns a CARDIAC thread... start here -> http://www.larkfarm.com/cardiac_answers.htm or here -> http://www.bellsystemmemorial.com/belllabs_kits_cardiac.html Fiber-based computing... big fun! -ethan

19 years, 6 months

S100 PROM boards

by dwight.elvey＠amd.com

>From: "Randy McLaughlin" <cctalk at randy482.com> > > >"Start with a 24 pin socket and plug it into the PROM board leaving pins 19 >& 21 hanging out, tie these to ground (pin 12 or any convenient spot)." Hi Apologies. I didn't see that part clearly. Dwight

19 years, 6 months

S100 PROM boards

by dwight.elvey＠amd.com

>From: "Ethan Dicks" <ethan.dicks at gmail.com> > >On 6/10/05, Dwight K. Elvey <dwight.elvey at amd.com> wrote: >> >If you are willing to only use 1K it's easy, no changes are required to the >> >board: >> >> I'm not sure how you would define removing a power supply lead >> but I'd call that a change?? >> Dwight > >Socket the 2732 with that pin hanging out of the socket. You can even >tie it to Vcc or GND with a jumper wire to either pin 12 or pin 24... >no need to mod the board, just the 2732. > >-ethan > > Hi I'd stack two machine pin sockets, with jumpers and pins removed, but that isn't what was said. Dwight

19 years, 6 months

S100 PROM boards

by dwight.elvey＠amd.com

>From: "Randy McLaughlin" <cctalk at randy482.com> > >From: "Cini, Richard" <Richard.Cini at wachovia.com> ---snip--- >> Before I go slogging through the manual to try to hammer a 4k >> chip into a 1k socket, does anyone have any experience making this mod? >> ---snip--- >If you are willing to only use 1K it's easy, no changes are required to the >board: > Hi I'm not sure how you would define removing a power supply lead but I'd call that a change?? Dwight

19 years, 6 months

← Newer
1
...
45
46
47
48
49
50
51
...
69
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 June 2005