test-drb January 2021

test-drb@ccmp.vtda.org

114 participants
96 discussions

M688 Flip Chip Unibus Power Fail Driver Modules

by jnc＠mercury.lcs.mit.edu

> From: Steven Malikoff > Would that be part of this system at a Japanese computer museum? ... > the 11/05 has 'Unichannel15' on it Yes, the 3 bays in the center are a PDP-15. (The indicator panel at the top of the center bay is the one for the PDP-15 CPU; you can see it here: http://ana-3.lcs.mit.edu/~jnc/tech/DECIndicatorPanels.html at the top of the 'PDP-15' section.) The Unichannel 15: https://gunkies.org/wiki/UNICHANNEL_15_System is undoubtly there to drive the RK05; I don't think there's a native PDP-15 controller for that. > There is an 11/15 ??? Is that a typo for 'PDP-15'? The -11/15 looks just like an -11/20 https://www.ricomputermuseum.org/collections-gallery/equipment/dec-pdp-1115 except it only has 16 address switches, not 18 as on the /20. (The front panel shown there has an OEM-specific re-paint; I couldn't quickly turn up an image of a DEC /15 front panel.) Noel

5 years, 1 month

Bendix G-15 and Control Data 160 console on ebay

by p.gebhardt＠ymail.com

If anybody of you has been looking for a Bendix System or a CDC 160 console and has deep pockets: That's your opportunity ;) ebay numbers 203239156838 and 203239181341 Not affiliated with the seller. Just saw the listings - can't believe that such cool systems are still stored in some warehouses in the U.S. for business purposes ... Cheers, Pierre ----------------------------------------------------------------------------- http://www.digitalheritage.de

5 years, 1 month

M688 Flip Chip Unibus Power Fail Driver Modules

by jnc＠mercury.lcs.mit.edu

> The "Spare Module Handbook" lists: > ... > MX11-B I apparently can't read. Should be "MX15-B": https://gunkies.org/wiki/MX15-B_Memory_Multiplexer Noel

5 years, 1 month

test please ignore

by jwest＠classiccmp.org

Test, please ignore.

5 years, 1 month

M688 Flip Chip Unibus Power Fail Driver Modules

by jnc＠mercury.lcs.mit.edu

> From: Ethan Dicks > what are these found in? The "Spare Module Handbook" lists: RH11-AB TM11, TMA11 MX11-B Does _anyone_ actually have an MX11? Any documentation would also be welcome; all I've been able to find out about it is a listing for the addresses of control registers. Noel

5 years, 1 month

M688 Flip Chip Unibus Power Fail Driver Modules

by jnc＠mercury.lcs.mit.edu

Anyone need/want a couple of these? Someone has a group of 5 for sale on eBait (#184317666245), and I want a couple, but not _5_. The seller didn't respond to a request to split up the lot, so I'd like to go in with a couple of other people on the. Any takers? Noel

5 years, 1 month

DEDICATED HOBBYIST ALERT: IBM AS/400 9406-F2 for cheap sale in Germany

by poc＠pocnet.net

Hello, to fellow readers in Germany and surrounding areas: HUGE 9406-F2, 300?, pickup in Heidelberg, Germany. Might be a Multiprocessor-Machine. https://cgi.ebay.de/174577267021 I?m not related to the seller. Have seen this by chance. I requested more photos to see what machine it is. Would be very sad if it will be scrapped. I can forward the additional photos as email on request. :wq! PoC

5 years, 1 month

KL11 asynchronous serial line interface on eBay

by jnc＠mercury.lcs.mit.edu

Here: https://www.ebay.com/itm/284137678274 and: https://gunkies.org/wiki/KL11_asynchronous_serial_line_interface if you want to know what it is. The lot includes an M105 Address Selector and an M782 Interrupt Control (which you'd need to actually use it); the price for the group is quite reasonable. Noel

5 years, 1 month

Dec RQDX: What kind of chips on it?

by cz＠alembic.crystel.com

Can someone check to see if a RQDX2 used the Western Digital chips to interface to MFM drives? Reason I'm asking is the MFM emulator can identify an RQDX3, and also a Pro/350 controller but this particular RD52 I have (which was verified by me to run Digital Mumps) is reading as: root at beaglebone:~/mfm# ./mfm_read -a Board revision C detected Found drive at select 3 Returning to track 0 Drive RPM 3525.4 Matches count 36 for controller WD_1006 Header CRC: Polynomial 0x1021 length 16 initial value 0xffff Sector length 512 Data CRC: Polynomial 0x1021 length 16 initial value 0xffff Interleave mismatch previous entry 0, 9 was 1 now 0 Selected head 8 found 0, last good head found 7 Read errors trying to determine sector numbering, results may be in error Number of heads 8 number of sectors 18 first sector 0 Unable to determine interleave. Interleave value is not required Drive supports buffered seeks (ST412) Disk has recalibrated to track 0 Stopping end of disk search due to recalibration Number of cylinders 512, 37.7 MB Thanks! CZ

5 years, 1 month

Keyboard storage, part 2

by aperry＠snowmoose.com

An update on keyboard storage, which I asked about here last month. I ordered some USPS Large Flat Rate Priority Mail "board game" boxes. This is a size not usually available at the post office and come 25 in a pack. They are a good size for mailing (and I am glad that I ordered them so I can use them for that), but I don't think they work for keyboard storage. They are so much larger than the keyboards that I am storing that lots of packing material is needed so they don't move around. Also, they are designed to be sealed and shipped, so there isn't a convenient way to open them once they have been closed. Next, I ordered the Uline keyboard boxes. I had to get 25 of them and they are not free ($2.70 per box plus tax and shipping). They can be open and closed. They are a much closer to the size of a keyboard (surprise, surprise!) so not much packing material needed, but they are slightly smaller than a Sun Type 5c (as well as Axil) keyboard and needed to modified for those two. No modification needed to store a Sun Type 4 or CompuAdd Sun-compatible keyboard in one. I haven't tried a Sun Type 6 yet. To anyone in the Seattle area that need keyboard boxes, I will probably have 10-15 of them once I get all of my keyboards packed. If you would like any, let me know. alan

5 years, 1 month

← Newer
1
2
3
4
5
6
7
8
9
10
Older →

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 January 2021