test-drb February 2006

test-drb@ccmp.vtda.org

224 participants
452 discussions

by aek＠bitsavers.org

I have no idea if RT-11 has a native utility that permits making a disc image. -- copy/device with one other option I don't remember off the top of my head ----- > I notice there aren't any RL01 disk images up there. -- PDP-11 software is still being sold (in theory..)

20 years

RX02 emulator?

by doc＠mdrconsult.com

Has anybody built and used Peter McCollum's Qbus RXV11 emulator? http://www.geocities.com/saipan59/dec/rxv11_emu.html I saw that somebody on CC is running the Unibus version, and it got me curious. Doc

20 years

RX02 emulator

by henk.gooijen＠oce.com

Hi Doc, I catched this topic in my spam filter, don't know how it got there ... I have built the prototype for Pete and tested it in my 11/34A. In 3 words: it works great! You install the board in an empty UNIBUS slot, position C-D. Further, you need a M105 in position E, and a M7821 in position F, IIRC, but Pete's website explains it all. See http://www.pdp-11.nl/rx11emul.jpg for the RX11 emulator in action, or search the Classiccmp archive, two weeks ago or so ... BTW, if your system has the (real) RX11 (for RX01) or RX211 (for RX02) installed, you must either remove that module, or configure it at on other CSR. Also, Pete's RX11 board does *not* short-circuit NPR (CA1-CB1), so check the backplane, or (what I did) solder a short on Pete's board. Remember the NPG of the RX211! I asked Pete if he is willing to develop a PCB for the RXV11 (qbus) too, and he said that as he has the board"fingers", that would be do-able. So, if enough people ask for the RXV11 ... I'd like one! - Henk, PA8PDP. This message and attachment(s) are intended solely for the use of the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by telephone and with a "reply" message. Thank you for your cooperation.

20 years

OT: seeking: MPG3102AT (in UK)

by classiccmp.org＠irrelevant.fsnet.co.uk

Hi all. Sorry it's only 5 years old, but I'm trying to find an Fujitsu 10Gb IDE hard drive, model MPG3102AT, in order to rescue data off the one I have here. I gather that these have a fairly common fault that something in the board goes, causing it to disappear as far as the PC is concerned. We had a power cut this morning, and when it came back on, the drive wasn't found... I've already tried swapping it with the apparently identical board off a MPG3204AT however that's a 20Gb drive, and it just clunks a lot when on this mechanism; presumably there is a setting somewhere that means it's looking for more heads or something. Sadly, I'm not up to component level or firmware debugging on these things. Unfortunately, speed is of the essence here.. so if there's anybody in the UK with one of these, surface condition immaterial, that would be willing to let it go, please get in contact. Naturally I'll cover any costs, collect, replace with something similar or bigger, etc. Once i've got my data, you can even have it back.. Cheers, Rob.

20 years

SIMMs and other memory dongles (was: Common items you passed up

by trag＠io.com

>Date: Tue, 31 Jan 2006 21:17:49 +0000 (GMT) >From: ard at p850ug1.demon.co.uk (Tony Duell) >> >> It is. I own some three or four cards which have four 30-pin SIMM >> >> sockets and are designed to plug into a 72-pin socket. >> > As I look at these, I notice that they're all adapters as opposed to >> > something that gangs up multiple SIMMs to create a higher capacity >> > "SIMM". Anyone seen anything like that? >> >> Um, that's exactly what mine do, unless I'm misunderstanding you. For >> example, you can plug four 1M 30-pin SIMMs into one and you get a 4M >> 72-pin "SIMM". > >A 1M 30 pin ZIMM has 1048576 locations each of 9 bits. > >A 4M 72 pin SIMM has 1048576 locations each of 36 bits. It's electrically >much the same a 4 20 pin SIMMs. I suspect the adapter is just connectors >wired together in the right way. > >I think what the first poster wants is a thing that takes 4 30-pin 1M >SIMMs and looks like a 4M 30 pin SIMM to the rest of the system. That is, >it appears to have 4194304 locations, each of 9 bits. It's not hard to >design something like that I think, but it would inovlve a few chips It would be the same logic one finds on "composite" SIMMs. These are SIMMs of larger capacity built out of many chips of smaller capacity. Typically, there are 32 or 36 (non-parity vs. parity) identical memory chips on a composite SIMM, plus one or more chips to handle the logic to which Tony refers. I've seen the logic handled in one or two 16V8 PALs in a 20 pin PLCC package. The composite 30-pin SIMMs I've seen have a total capacity of 16MB (16M X 8 or 9) built out of thirty-two or thirty-six 4M X 1 chips. I have also seen composite 72-pin SIMMs with a capacity of 64MB (16M X 36, parity) built out of thirty-six 4M X 4 chips. However, the 72-pin composite SIMM had no additional logic. I haven't looked at the spec, but I assume that 72 pin SIMMs support splitting the CAS lines from the host somehow into multiple banks on a single SIMM? Or maybe there were some surface mount transistors playing with the address lines which I overlooked. I've seen adapters under the commercial name SIMM'verter that do the 4 30-pin into 1 72 pin conversion. But I've never seen one that does 4 30-pin into 1 30-pin. However, I have seen 2 72-pin into 1 72-pin adapters, so there might be a 4:1 30 pin adapter. Still, a set of four 16MB 30 pin SIMMs on Ebay typically goes for $25 plus shipping. So why not just buy the 16MB 30 pin SIMMs and avoid the possible reliability issues of converters? A converter (and/or composite SIMM) may overload the current capacity of the address or control line drivers of the host machine. I have been working on (very slowly) a design for some 16MB 30-pin SIMMs that use just two 16M X 4 chips. It is going slowly because I'm laying out an 8.5" X 11" panel for economic reasons, and my IIfx SIMM design is on the same panel, and my software doesn't copy and paste traces, so I'm having to layout duplicates on the panel by hand. Jeff Walther

20 years

Just won HP 4952A / HP 18179A protocol analyzer/serial adapter

by rcini＠optonline.net

All: I just won this protocol analyzer (with the 002 option which is the extended memory option) on eBay. Does anyone have a PDF of the manual and disk images (or pointers thereto)? Thanks!! Rich Rich Cini Collector of classic computers Build Master for the Altair32 Emulation Project Web site: <http://highgate.comm.sfu.ca/~rcini/classiccmp/> http://highgate.comm.sfu.ca/~rcini/classiccmp/ /************************************************************/

20 years

FA: NEC PC-8300, Tek curve tracer adapters, Multibus extender card

by rigdonj＠cfl.rr.com

Cleaning out some of the misc stuff. See <http://search.ebay.com/_W0QQsassZrigdonjQQhtZ-1> Joe

20 years

WANTED: 8088 Assembler

by tosteve＠yahoo.com

Hello, Where can I get an Assembler for an old 8088 system? Please email it to me if you have one. Thanks! Steve. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

20 years

Salt Lake City hospitality

by legalize＠xmission.com

Speaking of road trips and the Red Iguana, if any of you cctalk'ers are making your way through or to SLC, be sure to email me a 'heads up' and I'll treat you to a pint of beer and give you a look at my collection if you're interested. -- "The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ: <http://www.xmission.com/~legalize/book/> Pilgrimage: Utah's annual demoparty <http://pilgrimage.scene.org>

20 years

IBM Quick Reference Guide - 1992

by tosteve＠yahoo.com

I found this interesting - The IBM Personal System/2 Quick Reference Guide from 1992. It contains List as well as Educational (NEP) prices for hundreds of systems and components. Maxed-out PS/2 model 75 - only $11,295! (486, 33MHz, 8MB, 400MB) 38 JPEG images - very large in size - sorry, no PDF! http://members.cox.net/oldcomputerads/QRG/QRG.html Steve. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

20 years

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test-drb February 2006