test-drb January 2006

test-drb@ccmp.vtda.org

240 participants
511 discussions

by TMGHOUSTON＠aol.com

Hello, I came across your name on a search for TI-980. Do you have any contacts who can do repairs for the different boards inside the TI-980? If you do, please pass it on as I've got a customer who needs repairs. Would you happen to know someone who might have a unit for sale? Thanks. E. Henry Valdez TECHNOLOGY MARKETING GROUP Houston, Texas USA (713) 666-6677

20 years, 1 month

More RLV12/RL02 problems (faults on Write)

by charlesmorris＠direcway.com

On Wed, 04 Jan 2006 23:15:48 -0600 (CST), you wrote: >It sounds very much like he could have blown something on the controller the >first time when he wired it wrong, and said it got "hot". That was only referring to the transistor that drives the POK signal. It survived. I had also found that the "upside-down and backwards" hookup places two 75113 drivers in contention - but they are not fried either. >Either that or, I'd still blame the cable. I haven't known qbus cards to >just go bad like that. Unlikely given that all read tests pass and the system boots... and the Write Data and Write Gate signals are making it to the logic board in the RL02, by direct measurement. I missed the fact that the error code returned by the toggle-in program (102210) actually has WDE (15) as well as WGE (10) set. I am not sure which came first (i.e. the write data error resulted >from the Fault/head withdrawal after the write gate error, or vice versa). But the problem could also be on the drive's R/W board. There is some logic there that can cause a WDE. I'm not sure what fault happens if there is a bad steering diode or write current source. More as I investigate... I may have to fix the faulty p/s on my Tek 7403 so I can plug in the logic analyzer! That will tell me for sure which line is first. -Charles

20 years, 1 month

Cool software find

by doc＠mdrconsult.com

I'm going through some cartons of "Someday Stuff" - things I've accumulated with the intent of using or trying, but not right now. I found a box of floppies I just barely remember buying, and then not having a clue how to install. It's old SCO stuff: UNIX System V/386 v3.2.0 N1-N3 UFA1-UFA2 B1-B8 X1-X10 Open Desktop v1.0 N1-N5 type 386GT P1-P37 Open Desktop v1.1.0 N1-5 type 386GT N1 type ku386 UF1-UF2 P1-P37 Disk P1 of the ODT v1.0 set is labeled bad, and I don't have they activation keys for it, but the SysV/386 and ODT v1.1 look good, and have serials and activation keys. Of course, there are no docs at all other than the license code sheets, so I don't know if these are complete, even. At least they're all sequential sets. :) Doc

20 years, 1 month

DEC 874-A Power Conditioner

by henk.gooijen＠oce.com

I can see the problem :-) The power controller is most of the time a part of a complete printset of a machine. That is also the case with the PSUs. Anyway, check out: http://www.mainecoon.com/classiccmp/861%20controller/ (for 861) http://www.mainecoon.com/classiccmp/PDP-11-44/ (has the 877) hope that helps a little. - Henk. > -----Original Message----- > From: cctalk-bounces at classiccmp.org > [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Richard > Sent: donderdag 5 januari 2006 2:26 > To: General Discussion: On-Topic and Off-Topic Posts > Subject: Re: DEC 874-A Power Conditioner > > > In article <10601050053.ZM61 at mindy.dunnington.plus.com>, > Pete Turnbull <pete at dunnington.plus.com> writes: > > > On my 861Bs there are 8 mains outlets on the left, 4 on the > right, and > > the ON/OFF/REMOTE switch is towards the right, with one unlabelled > > power control socket to the left of it, and two more to the right. > > OK, I looked at it more carefully... its an 871, not an 861. > > It has 6 switched outlets and 2 3-conductor connectors > labelled J1 and J2. J1 has something plugged into it that > goes into the cabinet somewhere. Switching to "remote on", > and then applying power everywhere and diddling the AUX > ON/OFF switch did nothing. I'll have to trace where this > cable from J1 goes in the cabinet to find out more. > > A couple people said that the docs on this were at > bitsavers.org, but I couldn't find it. URL anyone? > -- > "The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ: > <http://www.xmission.com/~legalize/book/> > Pilgrimage: Utah's annual demoparty > <http://pilgrimage.scene.org> 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, 1 month

hard drives

by Useddec＠aol.com

There has been some recent reference to ST225 drives. That reminded me that I had a shelf (which I need) full of drives I purchased from a maintaince company as surplus spares. Most units were tested and sealed in static bags. Any interest? Here is a partial list. Some are more than qty one. Epson HMD 720 360K full height Computer Memories 6426S Connor CP334 Seagate 212 225 225N 251 4026 412 506 Miniscribe 2012 8425 CM4510 Olviletti D5126H XM/5220/2 Shugart 712 Tandon TM252 TM262 Micropolis 1355 (non-tested, non-baged) I hope that I read all the model numbers correctly through the static bags. Thanks, Paul

20 years, 1 month

Real Old School Programming (was: Re: Where to buy a Selectric?)

by Arno_1983＠gmx.de

Tony Duell wrote: > I know I have some of the BASIC coding forms for the TRS-80 model 1 > around here somwehre. (...) > I should have some coding forms for the HP9100 calculator around here > too, and maybe some for the HP67. The only ones I have are fairly specialized, they're for the Triumph- Adler Factura 100 (German electronic computing typewriter for invoices, accounting work and such). I got them from my Grandad who worked in a business machine shop and used to write programs for them according to the customer's specification, and I've already started a half-hearted attempt to recreate them as Excel spreadsheets. Yours sincerely, -- Arno Kletzander Stud. Hilfskraft Informatik Sammlung Erlangen www.iser.uni-erlangen.de Lust, ein paar Euro nebenbei zu verdienen? Ohne Kosten, ohne Risiko! Satte Provisionen f?r GMX Partner: http://www.gmx.net/de/go/partner

20 years, 1 month

ompupro 8085/8088 switchover problem

by Watzman＠neo.rr.com

I've had a lot of DIP switches go bad, usually open no matter what you set them to. Don't ignore that possibility in your troubleshooting.

20 years, 1 month

Old Mac SW help

by rcini＠optonline.net

All: If I could prevail upon the Mac guru's kindness again, but I'm looking for working copies of Microsoft BASIC for the Macintosh version 1.0. This is the 68k version of MS-BASIC. It's a two-disk set and one disk is flaky and one is definitely bad. If someone has this and is willing to make a Stuffit archive for me, I'd appreciate it. TIA! 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, 1 month

Speaking of 6502s, was Re: 70's micros still available -

by dm561＠torfree.net

Date: Wed, 04 Jan 2006 10:20:51 -0800 From: "Chuck Guzis" <cclist at sydex.com> Subject: Re: Speaking of 6502s, was Re: 70's micros still available - >>On 1/4/2006 at 8:10 AM M H Stein wrote: >>Most languages were ported to the PET (although some were for the 6809 >>in the dual-processor SPET): >But a 6809 is nothing like a 6502! Of course not; I was just pointing out that any search of 6502 software etc. for the PET will probably include 6809 stuff as well. >If anything, a 6809 is an improved 16-bit version of a 6800. No "if anything" about it; in the words of the 6809 designers (who had also been involved in development of the 6800): "We feel (the 6809) is the best machine so far made by human." (From a 3-part series starting in Byte Jan '79, detailing the philosophy and development of the 6809 - wonder if they're suggesting that there were better machines, presumably made by non-humans? Aliens? The proverbial infinite number of monkeys?) >In a way, this goes toward the idea of the 6800 having the more useful >architecture than the 6502. Arrghh... do we always have to have these discussions about which CPU/ computer/OS/language etc. etc. is better/more useful than xyz? More useful for what, when, for whom, at what cost, yadda, yadda...? And how does software being written for a 16-bit 6809 (three years newer than the 6502) say anything about the relative merits of the even older 6800? I suppose that software being written for the Pentium proves that an 8080 was better than a Z80? As a matter of interest, the 6502 was the successor to the 6501, pin-compatible with the 6800 and not that much different. The 6809 was substantially different from both of them... m

20 years, 1 month

RT11 boot block 0 words ?

by pete＠dunnington.plus.com

On Jan 4 2006, 21:49, Gooijen, Henk wrote: > I would like to use the vast knowledge of this community, as a brief > search through the calssiccmp archive gave no answer ... > I can't get RT11 booted anymore on my 11/34. > Is the first word (000240) the first word of block 0 of the RT11 bootstrap? Yes, AFAIR all standard DEC bootstraps have 240 as the first word of the boot block. 240 is NOP. Somebody once told me why they're done that way, but I can't remember; only that it seemed sensible at the time. The only exceptions I know are the not-really-bootstraps on the first block of non-bootable RSX disks, which contain a little bit of code that prints something like "This is not a bootable disk" to the console, and then halts. It sounds a bit like your boot block has been wiped, and mostly replaced with zeros. Can you load the first block off the disk manually, preferably not into location 000000, and examine it? Should be fairly easy with an RL11. Then try some other block and make sure that's not all zeros, to ensure it's the disk content you're seeing, not some problem with the controller. -- Pete Peter Turnbull Network Manager University of York

20 years, 1 month

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test-drb January 2006