test-drb April 2017

test-drb@ccmp.vtda.org

169 participants
185 discussions

by pete＠petelancashire.com

I've read the 745 can use two keyboards. And looking for recommendations One it the same keyboard that goes with the 9000/300, the 46021A/B/C and the other is the "PC-101" C1429A/B (and I think C) Anyone with a 745 ? -pete

7 years, 8 months

Selling SGI Fuel

by jon＠jonworld.com

I should post to Nekochan but I'm going here 1st. 600Mhz R14K SGI Fuel, 1G of RAM. 16G HDD. I threw in a soundcard that *should* work with IRIX but I'm not 100% sure. IRIX 6.5.30 seems to be loaded. I tried to build/load some of the Nekoware stuff at one point but ran out of time. Size and weight makes shipping prohibitive (unless you're willing to pay.) I'm located in the UK now in OX10 (south of Oxford and north of Reading.) -- -Jon +44 7465 605833

7 years, 8 months

Intel 64 kbyte qbus memory board?

by mattislind＠gmail.com

Does anyone know how to configure the Intel IN-1611 64 k qbus memory board? I seem to be unable to find documentation online. https://imgur.com/a/KBIoJ There a switch block an then also a number of jumper wires.

7 years, 8 months

WTB: DEC Rainbow Expansion Memory

by shadoooo＠gmail.com

Hello, I'm in the pretty same condition, I have a Rainbow 100B without memory expansion. Not sure however, about the correct board number, which would fit the 100B. What should I search for? Thanks Andrea

7 years, 8 months

Where/who to donate Sun Ultra 10 in UK?

by pete.dodd24＠gmail.com

Dear All, I'm looking for ideas for passing on an old Sun Ultra 10, which I adopted when my old work was going to bin it. I installed Debian, but have the original OS media. Unfortunately, 3 moves and 2 kids later my time to tinker is non-existent, and my partner has made clear this needs to go before another imminent house move. I notice from my last attempt to boot that it now has the NVRAM battery problem, which a quick search tells me may be fixable. Ideally, I would like to hand it over to someone with more time/motivation (for free) rather than sending to the tip, but I'm stuck for ideas. I did get in touch with wildfire systems, who said it isn't economically viable for them even at zero cost. The Ebay market for these things seems more US-centric and registering for an account and dealing with postage is more effort than I would like (I live in Sheffield, UK). Any ideas gratefully received! Thanks, Pete

7 years, 8 months

Re: Extracting files off “unknown” 8 inch disks. Any thoughts…

by terry＠webweavers.co.nz

>Here's a writeup for those interested: >http://www.classic-computers.org.nz/blog/2017-04-15- adventures-with-an-8-inch-disk-drive-part1.htm One thing in this project puzzled me. Initially when I was testing the drive I tried to format it for 77-tracks. I used the command FORMAT B: /u /T:77 /N:15 . It wouldn't let me. MS-DOS said " "Formatting 1.15M parameters not supported by the drive" After trying a few other things (unsuccessfully) I just tried a straight FORMAT B: /u It then formatted it without complaint? Listening to the head moving, I counted 77 tracks. The last three tracks the clicking stopped. I'm assuming the head just wrote over that final track 3 times. MS-DOS told me I'd formatted for 1.2MB. I'm puzzled why I couldn't format the disk using the /t:77 and /n:15 switches. Did MS-DOS just go by what was in the CMOS. If that's the case, why have those switches at all? Are they just legacy switches for pre-CMOS machines? Anyone know the answer to this? Terry (Tez) > >

7 years, 8 months

Kennedy 9000 Tape Drives, Terminals and Packs

by earl＠baugh.org

I was helping out someone here locally to dig thru a pile of electronics that he had obtained in helping out a woman clean out her house. Her husband passed away and she wanted the space back. Apparently the husband "somehow" dealt in HW repair. A good number of the items were known broken spares, Shugart 1004 drives (about 36) and a couple tandem floppies. Those he found a new home for. There were a few items that I told him I'd help circulate info on since they are a bit more specialized (I'm just trying to help him liquidate the items, he is surprising the woman who he got it from with a cash gift when this is done) 1) 2 NOS Kennedy 9000 series tape drives. I checked, they look pristine. There was an invoice that says they're Kennedy 9000-3, 4s models. 2) 9 drive packs. marked ATHANA, which may be RK05 packs (I couldn't find any markings on them to indicate what size, etc.) 3) Lastly he has two Visual 50 terminals. This is all in the Atlanta area, so if you have any interest, let me know and I can relay information to him. Obviously the Kennedy drives would cost a bit to ship... Thanks. Earl

7 years, 8 months

C, STL, primitive languages that live on and on ... Re: Does anyone here know Siemens STL?

by chd＠chdickman.com

There are a lot of smart people here with wide ranging experiences, so I like to ask questions from time to time that get more to philosophy. So "If C is so evil why is it so successful" was one of those questions. The answer I see is that it is the path of least resistance to the most successful outcome in the time horizon of the effort. Or, it gets the job done. Personally, I am stuck in the machine control world where things like symbolic names and type checking are sometimes non-existant. And I wonder why. SIL-3 and PLe with stone knives and bearskins. On Wed, Apr 12, 2017 at 1:48 PM, Chuck Guzis via cctalk <cctalk at classiccmp.org> wrote: > On 04/11/2017 07:03 PM, Charles Dickman via cctalk wrote: >> The Balkanized nature of programming is interesting. > You might find more fertile ground plowing the plctalk.net forum when > your questions relate to the STL/SCL/FBD/LAD/CSF area. I am familiar with STL (and some of the others). My question was not for help. I was trying to present a contrast between the nit-picking the list was doing about C and that fact that a huge amount of mission critical programming is done in languages that are essentially machine code. It was a ham fisted attempt. Don't post after too many high ABV IPA's. > FWIW, "STL" in Siemens-talk is an acronym for "Statement List". Why it > isn't "SL" is anyone's guess. Probably for the same reason that PZD is process data. > --Chuck -chuck

7 years, 8 months

Got a request for an image of CP/M for Morrow Disk Jockey

by billdegnan＠gmail.com

I got a request through my web site for a CP/M System Boot Disk for the Morrow Disk Jockey DMA Controller Board. Anyone have an image I could make to help this guy out? Thanks BIll

7 years, 8 months

Horrible error in "pdp11 bus handbook"

by jnc＠mercury.lcs.mit.edu

Just a heads-up that the 1979 edition of the "pdp11 bus handbook" has a very serious editing error in it, in the description of UNIBUS arbitration. On page 38, immediately after step 13 of the NPR Arbitration Sequence ("13. .... SACK must be negated before BBSY may be negated."), it says "A bus master may issue an interrupt command to the interrupt fielding processor." Despite its location in the text, this does __NOT__ apply to the "NPR arbitration sequence" being discussed above. There is an editing error - this text is (or _should be_) separate from the "NPR Arbitration Sequence" section just before it; it belongs with "BR Interrupt Arbitration Sequence" - that header (on pg. 39) was put in the wrong place. The 1975 "peripherals handbook" has very similar text, but it _does_ have a section header after the NPR details (line 13 is identical), and before the start of the (very similar) BR text ("A bus master that has gained control ... through a BRn/BGn arbitration transaction may issue an interrupt command to the processor."). Noel

7 years, 8 months

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test-drb April 2017