test-drb August 2005

test-drb@ccmp.vtda.org

227 participants
528 discussions

by brad＠heeltoe.com

Hi Is there a list of the various pdp-11 unibus backplanes anywhere? My 11/44 has a DD11-DF in it which is impossible to get cards into and out of. It's like something is physcally wrong with it. Rather than damage any cards I thought I'd replace it. So, I looked at my 'space' 44 and found it had an RK611. That's nice, but not helpful as I have no rk05's (yet :-) It also has a DD11-B, which looks like it might work, since I only need 2 slots for the short term. I was curious if there was a list somewhere of what stock unibs backplane panels. (like what's the difference between an DD11-DF and a DD11-DK?) -brad Brad Parker Heeltoe Consulting +1-781-483-3101 http://www.heeltoe.com

19 years, 4 months

Memory chip substitute?

by rcini＠optonline.net

All: I'm repairing a few S100 memory boards and I'm having trouble crossing a memory chip on the SSM MB7 16k board. The chip is an NEC UPD410D. I have D5101LC1's "in stock". Are these equivalent? Thanks. Rich Rich Cini Collector of classic computers Build Master for the Altair32 Emulation Project Web site: http://highgate.comm.sfu.ca/~rcini/classiccmp/ /************************************************************/

19 years, 4 months

Attaching a Macintosh 400k external disk drive to a Catweasel

by tlindner＠ix.netcom.com

Anybody have any thoughts regarding this? I'd like to accomplish this without destroying the connector on the 400k disk drive. -- tim lindner tlindner at ix.netcom.com Bright

19 years, 4 months

HP tape drive available

by jwest＠classiccmp.org

HP 7970B (800BPI) I powered it up once, arms lost tension. May need major repair, maybe just a cleaning. I never looked in to it. It's taking too much room. First vaguely fair offer + shipping. I'm going to guess that it's around 130 pounds perhaps. Jay West

19 years, 4 months

Sanyo MBC-1000

by aw288＠osfn.org

I have an old Sanyo MBC-1000 CPM machine that is completely in my way, so out it goes. It powers up, but I don't have a CPM disk, so not much happens. I have some disks for applications, and the original users manual (sort of a thick thing). Anyone interested? It weighs about 40 pounds or so unpacked, and figure shipping from 10512. Cheap! Real cheap! William Donzelli aw288 at osfn.org

19 years, 4 months

HP21MX booster board?

by jwest＠classiccmp.org

I am doing a little basement cleaning and pitching some things. Was tossing an HP frequency analyzer that was in bad shape and decided to pop the cover and grab the cpu board (the cpu board is a 21MX M-series). Also got 64k memory & controller :) My question is two fold -first, what's necessary to use this M series board as a regular processor. I see the base instruction set on the bottom plus two additional non-standard microcode cards. I can just remove those, but didn't know if any changes to the M series board were required. Second, there is a board I've never seen before mounted under the mainboard on the opposite end of the microcode. The board is labled "booster board" and is about 1/2 the size of the main cpu board. I would normally think this was just a specific board to the frequency analyzer, but, I think I've heard Bob Shannon talk about this booster board before in more general terms. Should I keep the booster board? Jay West

19 years, 4 months

Supercolour 6000

by leeedavison＠yahoo.co.uk

Found one of these recently. It seems to be an intelligent hires graphics capable terminal with a number of emulation modes including . ANSI & DEC VT Aydin REGIS Tektronix TDS C4000 I have the 6041 desktop unit and 6071 VT220 keyboard, no monitor though. Inside the 6041 are two cards, one with a Philips 68070 and 1MB of battery backed SRAM (batteries missing) and a TMS34010 based card I assume this is the CPU/video card. Anyone know anything about this? Is it worth keeping? It needs batteries, fixings - screws etc, and probably some cleanup where a previous owner hand soldered 1/2 MB of zip RAM in. I've not powered it as I don't know the monitor requirements and it's not top priority yet. Lee. . ___________________________________________________________ To help you stay safe and secure online, we've developed the all new Yahoo! Security Centre. http://uk.security.yahoo.com

19 years, 4 months

Stuff for sale/trade

by rcini＠optonline.net

All: I'm rearranging the shop and I've found a bunch of stuff in boxes that I haven't used in a long time, some classic and some not. Here's the list: Compaq DLT 5g/10g SCSI tape drive. Working condition; pulled from service at home. Circuit Cellar SB180. Includes COMM180 board and floppy drives in a nice "shoebox" case. With disks. Circuit Cellar MPX16 system in case with software. HP Plotter 7550A (8-pen). Working (very heavy). Fluke 9010A microprocessor troubleshooter with 8080 pod. Working last time used. Remaining spare BYTEs: 1975: 12 1976: 4 1977: 2,3,10,11,12 1978: 1-6, 9 1979: 1,5-10,12 1980: 4,7-10 1981: 3-5,8 1983: 3,8 Please contact me off-list if interested in any/all. I'm trying to pare down my collection of things so I'd be interested in $$$ more than a trade (although I'm looking for MITS tape software and a memory board for a KIM-1). Shipping or pick-up would be from Syosset, NY (11791). US/Canada only (except magazines). Rich Rich Cini Collector of classic computers Build Master for the Altair32 Emulation Project Web site: http://highgate.comm.sfu.ca/~rcini/classiccmp/ /************************************************************/

19 years, 4 months

free Grinnell GMR-270 frame buffer for PDP-11

by hardware＠ees1s0.engr.ccny.cuny.edu

Dear Classiccmp Community, I have a Grinnell GMR-270 frame buffer for a PDP-11 to give away. It was given to me as working, but I cannot test it since I do not currently have a working PDP-11 system. It provides color 512x512 output to a monitor, which a included. Also included is the original documentation, which includes technical data and programming information. It seems that it can also act as a frame grabber. It has hardware pan/zoom functionality. It is a regular 19" rack unit, approximately a cube, and weighs around 40 pounds. I am in New York City. If you want it, come and get it. thanks, -kurt

19 years, 4 months

Got the Book

by aek＠bitsavers.org

I started reading it late Friday and looking at the pictures. -- If others would like to do the same http://www.bitsavers.org/pdf/cdc/6x00/books/ DesignOfAComputer_CDC6600.pdf

19 years, 4 months

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test-drb August 2005