test-drb November 2010

test-drb@ccmp.vtda.org

162 participants
241 discussions

Would You Pay $200,000 for an Original Apple Computer?

by marvin＠west.net

I saw this article about a Christie's auction and found it "funny" in a way. It will be interesting to find out what it actually brings. http://mashable.com/2010/11/12/apple-1-auction/

14 years, 1 month

Virtual memory

by roger.holmes＠microspot.co.uk

> From: Johnny Billquist <bqt at softjar.se> > > Gah. I have no idea what PPU mean, nor PP. You're probably just not old enough. In the 50s the main processor was called the CPU (Central Processing Unit) to differentiate it from the various PPUs, (Peripheral Processing Units). The first machine I programmed, the IBM 7094 had a CPU and two PPUs, one to read cards and write the images to tape transports, which would then be switched over to the CPU to read, compile and execute the job and write the results back to another tape transport which then got switched to the other PPU which then transferred the tape image to a line printer. Somehow now (when most peripherals have embedded processors which could be called PPUs) we seem to have stopped using the term.

14 years, 1 month

surplus source for MRA connectors?

by shoppa＠trailing-edge.com

> In particular, the MRA42P solder cup 42 pin "winchester" plug for > Diablo 31 disk drives. Manufacturer's webpage lists Powell and CDM as stocking distributors. http://dilp.netcomponents.com/winchesterelectronics.html Does the CHM or someone local to you have a RK03? Some mid-late-70's early DEC and DG 3rd-party sellers (AED? DSD? General Robotics?) sold Diablo drives with their own homegrown Unibus and Omnibus interfaces but that stuff was kinda crufty when it brand new, never mind 30+ years later. Wasn't the Diablo 30 the same as the RK03? Tim.

14 years, 1 month

CDC 6000/7000 operation, was: Virtual memory

by dm561＠torfree.net

Date: Wed, 10 Nov 2010 09:58:23 -0800 From: "Chuck Guzis" <cclist at sydex.com> Subject: Re: CDC 6000/7000 operation, was: Virtual memory On 9 Nov 2010 at 23:53, Richard wrote: > What you're calling the display controller I was lumping into the PPU. > > The project ends up being the same scope -- you need to drive the > display and there's not much in the display itself. Yup, the 6612 display controller occupied an entire chassis (chassis 12) in the 6600. It basically provided character generation and positioning control for the DD60. At first blush, the DD60 interface looks to be the same as that of your unit. I couldn't find a logic diagram for the 6612 (or 6602) on bitsavers, but I did find the programming reference manual, which might provide some hints: */pdf/cdc/cyber/peripheralCtlr/60333900B_6602_6612_Console_Display_Sep 74.pdf * = insert your favorite bitsavers mirror. --Chuck ++++++++++++++++++++++++++++ I scrapped a CDC display controller many years ago and probably still have some cards out of it (made a nice solid desk as well); doesn't quite look like the picture although the keyboard sure looks familiar. Had a large diode matrix 'PROM' PCB IIRC. I'll check the model number when I'm back home again in case there's anything useful. mike

14 years, 1 month

seeking DEC digital mps - microprocessor series monitor/control panel

by nigel.d.williams＠gmail.com

http://www.dvq.com/oldcomp/photos2/1k/dec_micro_panel.JPG I find this device quite fascinating (Intel 8008 plugged into a PDP-8 host), if anyone has one surplus I would be interested in negotiating. thanks. www.retroComputingTasmania.com

14 years, 1 month

Nuclear Data ND 6600

by legalize＠xmission.com

In article , Richard <legalize at xmission.com> writes: > > In article <E1P7wPP-0001ul-8h at shell.xmission.com>, > Richard <legalize at xmission.com> writes: > > > The Nuclear Data ND 6600 was some sort of laboratory PDP-11 setup. I > > have a terminal from such a system (very nice green keyboard). I'll > > upload some pics this week. > > However, I opened the case and was very surprised with what I found > inside the terminal. > > Its basically an empty box! Pics uploaded now: <http://picasaweb.google.com/legalize.slc/NuclearDataND6600> -- "The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download <http://legalizeadulthood.wordpress.com/the-direct3d-graphics-pipeline/> Legalize Adulthood! <http://legalizeadulthood.wordpress.com>

14 years, 1 month

need teco suggestions

by legalize＠xmission.com

I need a TECO command suggestion that will fit in 3 lines of 18 chars each. It would be nice if I could have 5 chars leftover to have "TECO:" or "TECO " in there :-) -- "The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download <http://legalizeadulthood.wordpress.com/the-direct3d-graphics-pipeline/> Legalize Adulthood! <http://legalizeadulthood.wordpress.com>

14 years, 1 month

FS on ebay: IMSAI 8080 Microcomputer and CompuPro S-100 Boards

by nick.allen＠comcast.net

For anyone interested... Just listed a fully functioning IMSAI and several compupro boards (Z80 8mhz CPU, floppy, hard drive and serial port controllers): http://shop.ebay.com/sdinet/m.html?_nkw=&_armrs=1&_from=&_ipg=50&_sop=1

14 years, 1 month

AT&T 610 terminal

by mark.kahrs＠gmail.com

My 610 burned up a few months back and I have no interest in reviving it. Is it a collectible? Or should I dispose of it at the local Goodwill?

14 years, 1 month

RL01/RL02 cables and terminators and unit plugs (was Re: PDP-11/34A bring up)

by ethan.dicks＠gmail.com

On 11/9/10, Tony Duell <ard at p850ug1.demon.co.uk> wrote: > The cables are differnet betwene the RLs and the RK06/07 (the latter has > all pins bet one (termintor power) connected That rings a bell (term power). > the former has rather fewer > wired), but AFAIK the terminator is the same (it terminates all signal > pins. I think at least one RL controller printset shows the exploded view > of the terminators with 'First used on Option/Model : RK06' specified. OK. That's a good detail to remember when setting up drives of either kind. One handy bit of trivia if you happen to have spare Unit plugs from the high numbers of an RK06/RK07 set is that they work in an RL01/RL02 if you mentally mask off 2^2 (i.e., an RK06/RK06 plug labelled "4" is "0" on an RL01/RL02). It's the same sort of switch/bulb housing, but one less bit going back to the electronics. We didn't do it often, but sometimes we were short some of the numbers and we did have a couple of RK07s and a drawer of random unit plugs. -ethan

14 years, 1 month

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test-drb November 2010