test-drb January 2013

test-drb@ccmp.vtda.org

222 participants
294 discussions

disk vs. disc, was Re: More division by a common language? (Was: Bad media (Was:

by barythrin＠gmail.com

Always wondered the same. Longer worded its floppy diskette. Not sure if it would ever be discette in eu? Alternatively discoteque (*sp) I believe is music or cd store in spanish. I'm not sure what disc (in compact disc) is short for if anything.

11 years, 11 months

pdp11/34 strange problem indeed.

by roe＠liveblockauctions.com

I'm restoring a pdp11/34a, and I've got a weird problem I'm hoping someone out there can help me with. The system seems to be working just fine, with one exception: bus reset just doesn't work. The unibus is configured correctly; I've verified that NPR is jumpered/granted correctly through the bus. This is a BA11-L box with the DD11-PK 9-slot backplane, configured like this: Slot 1 - CPU Slot 2 - CPU Slot 3 - A/B M9312 bootstrap/terminator, C/D/E/F M7859 front panel programmers interface controller Slot 4 - 128 Kword MOS memory Slot 5 - RL11 controller Slot 6 - C/D/E/F M7856 DL11-W console RS232 interface Slot 7 - C/D G7273 dual bus grant Slot 8 - C/D G7273 dual bus grant Slot 9 - A/B M9302 terminator, C/D/E/F M7856 DL11-W configured at 776500 for TU58 tape drive The symptoms: At poweron, the system starts the M9312 console emulator software; I can use it to deposit a small program into memory with no problem. Attempting to use the "S" command to actually start the program causes the RUN light to come on; the program never executes, hitting CTRL/HALT on the front panel causes BUS ERR, the RUN light stays on, and the only way to regain control of the system is power off. For example: @ L 1000 @ D 000777 @ L 1000 @ S fails as described above. If I use the front panel to install a program and run it, when I push CTRL/START, the system halts at the start address. For example: CTRL/HALT CLR 1000 LAD CLR 777 DEP CLR 1000 LAD CTRL/START the system halts, run light out, at address 1000. If I then press CTRL/CONT, the RUN and SR DISP lights come on, and everything works perfectly. I can CTRL/HALT the system, continue, etc. With no problem. Furthermore, if the program I enter contains a RESET instruction (000005), the behavior of the system as it executes that instruction is pretty much exactly like using the "S" command from the console emulator - RUN stays on, CTRL/HALT causes BUS ERR, and the system is non-responsive until I power the beast off. For example: CTRL/HALT CLR 1000 LAD CLR 240 DEP DEP DEP CLR 5 DEP CLR 1000 LAD CTRL/START (the system halts at address 1000) CTRL/HALT (single steps to location 1002 correctly) CTRL/HALT (single steps to location 1004 correctly) CTRL/HALT (single steps to location 1006 correctly) CTRL/HALT (RUN light comes on, CTRL/HALT causes BUS ERR with RUN, system is no longer responsive, have to poweroff) My reading of the unibus tech manuals indicates that there is no ACK of any kind for BUS INIT, so I am somewhat confused. There _is_ a bit of noise on the +5V power supply; a voltmeter shows 5.02 volts stable, but there is a .5V spike at 50 kHz showing on the scope; I can't see this causing problems _only_ with BUS RESET. I have also verified that CTRL/INIT from the front panel seems to do nothing at all. For example, if I halt the system and press a key on the console emulator, examining 777560 shows 000200 (which is correct, there is a character available at 777562). Pressing CTRL/INIT on the front panel does _not_ clear 777560 - it still shows 000200. All the 11/34a M9312 diagnostics run fine. This problem seems to be limited to attempts at RESET. A disassembly of the M9312 console emulator code shows that two things happen when you use the "S" command: 000005 (RESET) followed by a JMP (R5) It's the RESET that drives the machine nuts. Anyone have an idea? -- <http://www.liveblockauctions.com> Roe Peterson / Director of Research & Development O. 306.523.4005 / C. 306.501.6802 *Help Desk: 1.877.694.6100 / 306.694.6100* <http://www.liveblockauctions.com/index.php?p=FAQs>

11 years, 11 months

Elektronika BK - Soviet PDP-11 compatible - Re: DOOM

by jfoust＠threedee.com

At 09:30 AM 1/25/2013, Ethan Dicks wrote: >From the description, looks like someone scraped wikipedia last year, >did some formatting, and is selling a 56 page book of it. At $48.09, nice work if you can get it. - John

11 years, 11 months

FS. Working PDP 11/83 deskside case (UK)

by silvercreekvalley＠yahoo.com

Hi, I have a working PDP 11/83 in a Pedestal (desk side) type case. Its fitted with a reasonable sized Hard Drive, tape drive and 5.25" floppy disk. I think it has ethernet, but need to check. This is in good shape, and boots. Its the larger desk side case (not sure on the case name) so there is room for a second hard drive. These are nice, 'office friendly' versions of the PDP 11, and quite a bit easier than the UNIBUS machines to manage. Email me if interested. I can get full specs and pictures if there is any interest. Thanks Ian.

11 years, 11 months

Was: something else Re: Top Posting

by barythrin＠gmail.com

And don't get me started on those top subject posters...putting their subject in front of the old thread! <ducks>

11 years, 11 months

Bad media (Was: Need Kermit for Xerox 820-II in .IMD format

by cctech＠beyondthepale.ie

> > Consider that 42 is the answer to > whatdoyougetwhenyoumultiplysixbynine > I thought it was division that was messed up on slighlty later Intel CPUs, not multiplication? How did it go again? I am Pentium of Borg. Division is futile. Prepare to be approximated.

11 years, 11 months

Might be Ot but a questiion nonetheless :) usb memory stick to sd slot adapter do they exist if so where?

by halarewich＠gmail.com

hey all like the q says I want to be able to go from my usb mem stick male end and put it into a extermal speaker/mp3 player i have.. The type of memory card the speaker takes is a sd mem card looks like they used to make such a beast http://www.teampctechnology.com/product_detail.php?id=603# but not anymore doed anybody else know of any other adapters around that do the same thing Chris

11 years, 11 months

Apple M0110 keyboard with cable

by rampaginggreenhulk＠yahoo.com

All of them use the same kb I thunk. ------------------------------ On Wed, Jan 23, 2013 7:47 AM PST David Riley wrote: >On Jan 22, 2013, at 7:42 PM, Chris Tofu <rampaginggreenhulk at yahoo.com> wrote: > >> On Tue, Jan 22, 2013 12:07 PM PST Cindy Croxton Electronics Plus wrote: >> >> Anybody on this list have an Apple M0110 keyboard with cable, or just the >> cable, that is close to Croatia? I have a fellow there that really wants >> one, but the shipping is too high from the US. >> >> What kind of k/b is that. If I have one *maybe* Ill send it to him. My mum is Hrvatska. You have to ask him where he at for me though (town). > >It's the original Mac (128K and 512K, not Plus) keyboard. Phone jack >connection, no arrow keys. > > >- Dave > >

11 years, 11 months

Fwd: The Never-Before-Told Story of the World's First Computer Art

by legalize＠xmission.com

<http://www.theatlantic.com/technology/archive/2013/01/the-never-before-told…> (Don't blame me for the title re: "first") -- "The Direct3D Graphics Pipeline" free book <http://tinyurl.com/d3d-pipeline> The Computer Graphics Museum <http://computergraphicsmuseum.org> The Terminals Wiki <http://terminals.classiccmp.org> Legalize Adulthood! (my blog) <http://legalizeadulthood.wordpress.com>

11 years, 11 months

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test-drb January 2013