test-drb

test-drb@ccmp.vtda.org

101090 discussions

by k7kt＠yahoo.com

Hi Mark ! Ran across your 2016 note at ( http://www.classiccmp.org/pipermail/cctalk/2016-July/025530.html ) while looking for info on the HP9885M Disk Drive. I have one of these old drives in what appears to be near mint condition. I can't fully test it, don't have any disks, but it powers up without any magic smoke leaking out. LEDs lit up, capstan drive is working, belt is in pristine condition, ventilation fan is working, boards are powered. Certainly looks like it's ready to go. I've carried the thing all over the country as I've moved between jobs, intending to use the chassis in construction of a different electronic device. It has spent a lot of time in closets. I don't have an HP9825A or HP9845 computer and I'm getting too old to acquire such toys. If you have interest, I would like for someone who understands and appreciates such things to have it. I can share pictures. It would be a shame to disassemble such a well-built old beast. Please let me know. Have a great week! Ernie K7KT at yahoo.com

7 years, 11 months

Free: DDS-1 tapes, unused (new-old stock)

by sieler＠allegro.com

The DDS cleaning tapes have been claimed. I may have more unused cleaning tapes in storage, but I won't know for a few months. If I find any, I'll post. Stan

7 years, 11 months

What platform can run m68k COFF binaries?

by blstuart＠bellsouth.net

On Wed, 9/5/18, Ethan Dicks via cctalk <cctalk at classiccmp.org> wrote: > The part that puzzles me is the collection of object files and > binaries in the directory above that.? 'file' tells me that they are > "m68k COFF" files.? From what I've read so far, COFF binaries are from > System V Release 2-4.? What I can't reconcile is what they might have > been compiled on.? Is it possible these were made for A/UX?? The > relevant file dates (late-1988 through mid-1989) do overlap > availability of A/UX version 1. I'm pretty sure the AT&T UNIX PC (7300/3b1) used COFF. I remember messing around with it when porting an old version of gcc to the machine. At that time, GNU was playing around with something called robotusin (COFF medicine). BLS

7 years, 11 months

VMS Mosaic 4.2

by spectre＠floodgap.com

I'm worried that VMS Mosaic 4.2 is lost since WVNET's VAX systems are no longer operational, and it was stored on their FTP server (not somewhere that the Wayback Machine got to). I only have an old version of 3.6 and a diff of 4.2. Does anyone have the original copy of 4.2? It was named MOSAIC4_2.ZIP. What I've got is here: gopher://gopher.floodgap.com/1/gopher/clients/vms/ -- ------------------------------------ personal: http://www.cameronkaiser.com/ -- Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser at floodgap.com -- The world is coming to an end. Log off now. --------------------------------

7 years, 11 months

AlphaWindows - Protocol Information?

by Martin.Hepperle＠MH-AeroTools.de

In the 1990s a computer terminal standard "AlphaWindows" was proposed by the Display Industry Association (DIA). Sort of X-Windows for the poor. A few terminals appeared which supported multiple text windows following the this standard. Some limited global facts can be found in Wikipedia. I learned that for example the TeleVideo 995 and 9089 or the HP 700/70 terminals supported AlphaWindows. Obviously there were several implementation levels like: (1) Basic AlphaWindow (2) Mouse Operations (3) Decorations (4) AlphaWindow Credits Flow Control Unfortunately I cannot find any information on the protocol resp. escape sequences and the DIA is long gone. Does anyone have a manual with escape sequences for one of the terminals mentioned? Or other material describing this protocol? Note that other terminals of the similar types (e.g. HP 700/71) do not support this feature. Martin

7 years, 11 months

LSSM - Large IBM haul

by jnc＠mercury.lcs.mit.edu

> From: Anders Nelson > https://www.facebook.com/503408869821526/posts/1084448565050884/ This is an incredibly cool thing, and my hat is off to the LSSM for undertaking this. How's the fund-raising going? If money is still needed, I'll head off to Paypal and send a goodly chunk. Noel

7 years, 11 months

AlphaWindows - Protocol Information?

by blstuart＠bellsouth.net

On Wed, 9/5/18, Martin Hepperle via cctalk <cctalk at classiccmp.org> wrote: > In the 1990s a computer terminal standard "AlphaWindows" was proposed by the > Display Industry Association (DIA). Sort of X-Windows for the poor. > > Does anyone have a manual with escape sequences for one of the terminals > mentioned? Or other material describing this protocol? It so happens that I do have a copy of the standard. I suppose I'm one of only a few who paid the $99 to DIA to get a copy. Back in the early '90s I started writing an implementation for the Mac, but ended up not getting very far before other projects pushed it down onto the stack. I'll see what I can do about scanning it for you. BLS

7 years, 11 months

Milwaukee Computers MC-1200

by aek＠bitsavers.org

Another small project off my plate. Ethan had asked me years ago to make copies of the software for this machine. It is pretty obscure, one full page add in Byte, and it sank without a trace. 6502, p-System, totally custom MFM-encoded floppy interface based on a Moto 6852 synchronous serial interface chip. I had bought a Supercard Pro a while ago, and set it up to do some hard-sectored floppy imaging. Figured this would be a good test case, since it didn't have the problems with dealing with out of sync data streams (the SCP doesn't grok more than one sector hole so you have to turn off index synchronization). Made images, dragged my machine out of storage, cleaned it up, made a clone from the SCP image, and it booted! yay! SCP images are up under http://bitsavers.org/bits/MilwaukeeComputers I also put up cleaner images of the schematic and board layout, and annotated a disassembly of the boot prom from a scanned listing i've had for a while under http://bitsavers.org/pdf/milwaukeeComputers One thing I noticed that made me nervous is looking at the code there is no checksum on either the sector address or data fields on the floppy. I made an image of a floppy that I bulk-erased and initialized this morning, and all you see are the sync bytes and data, no trailing data where a crc would be.

7 years, 11 months

VAX 11/785 "Superstar" Backplanes

by pbirkel＠gmail.com

On the 'bay: 183405165416 and 183405165414 "Scrap / Gold Recovery" Six total. One wonders what the scrappers did with the rest, and where they came from given that the location is Goffstown, New Hampshire. paul

7 years, 11 months

Dilog DQ604 RL01 / RL02 emulation on ST506/ST412 disk.

by mattislind＠gmail.com

I unearthed some old TU58 tapes that luckily was readable (after carefully replacing the tension band) It resulted in two RT11 V4 images with two versions of the formatter program. One is bootable and the other not. http://storage.datormuseum.se/u/96935524/Datormusuem/Dilog/DQ604/sq604c.dsk http://storage.datormuseum.se/u/96935524/Datormusuem/Dilog/DQ604/sq604d.dsk I tried to run the formatter program in Simh: .run sq604C.sav TEST AND FORMAT DQ604 DISK SYSTEM (REV C.) DRIVE FORMATS AS RL01 UNIT (5.24 MB) SWITCH 3 CLOSED ENABLES BOOTSTRAP THERE ARE 17 PHYSICAL SECTORS PER TRACK (2) ALTERNATE CYLINDERS MAY BE ASSIGNED PER UNIT THE INTERLACE FACTORS ARE TWO OR THREE TO ONE DATA BUFFER ERROR USE PROCEED (P) TO REPEAT TEST HALT instruction, PC: 006312 (BR 6202) .RUN SQ604D TEST AND FORMAT DQ604 DISK SYSTEM (REV C.) DRIVE FORMATS AS RL02 UNIT (10.48 MB) SWITCH 3 CLOSED ENABLES BOOTSTRAP THERE ARE 17 PHYSICAL SECTORS PER TRACK (4) ALTERNATE CYLINDERS MAY BE ASSIGNED PER UNIT THE INTERLACE FACTORS ARE TWO OR THREE TO ONE DATA BUFFER ERROR USE PROCEED (P) TO REPEAT TEST HALT instruction, PC: 006312 (BR 6202) So it appears to be runnable. I also found the manual for the board and scanned it: http://storage.datormuseum.se/u/96935524/Datormusuem/Dilog/DQ604/DQ604.pdf Now the next step is to see if this can make the DQ604 board I have working with David Gessweins MFM emulator.

7 years, 11 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