test-drb January 2006

test-drb@ccmp.vtda.org

240 participants
511 discussions

by henk.gooijen＠oce.com

So, what I said ("there is no switch on the front panel of the 03 to control on/off") is still true :-) , but I had not thought of using LTC (or AUX) for that! Using that switch to turn on/off power to the 11/03 via the 861 is a nice idea. But checking the LTC/AUX wiring before 'mis'using the switch for on/off control is indeed even more clever :-) thanks! - Henk. > -----Original Message----- > From: cctalk-bounces at classiccmp.org > [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Pete Turnbull > Sent: woensdag 4 januari 2006 9:13 > To: General Discussion: On-Topic and Off-Topic Posts > Subject: Re: DEC 874-A Power Conditioner > > On Jan 4 2006, 8:22, Gooijen, Henk wrote: > > Hi Richard, > > I have one 11/03, but AFAIK (I'm at work now) there is no switch on > > the front panel of the 03 to control on/off. > > There should be, on all BA11-M, BA11-M, and BA11-S boxes > (except some expansion boxes that have no LED/switch panel at > all) though depending on the box, it may be labelled LTC or AUX. > > See, for example, http://hampage.hu/pdp-11/1103.html It's > the rightmost of the three switches on the panel. Also > http://www.abc80.net/pics/PDP11-23_cpu_2_big.jpg > > -- > Pete Peter Turnbull > Network Manager > University of York 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.

18 years, 11 months

DEC 874-A Power Conditioner

by pete＠dunnington.plus.com

On Jan 3 2006, 20:40, Julian Wolfe wrote: > AFAIK, there's only one panel for all 11/03, /23, and /23+ models, they just > come with different badges. You need a DEC power bus cable. Run it from > the connector on the CPU box to the power controller, set it to "remote on", > and flip the far right switch. Viola, power from the front panel. Yes, but... on some QBus systems the switch is jumpered to control the LTC (Line Time Clock signal) by grounding the BEVENT bus line. You ought to check the jumpers on the little electronics board before you wire an unknown system to the power bus. I've accidentally done it with the wrong jumper settings and it's done no harm, but YMMV. BTW, the connectors for the power bus are standard 3-pin AMP Commercial Mate-N-Lock conectors, which are fairly easy to get. -- Pete Peter Turnbull Network Manager University of York

18 years, 11 months

Compupro 8085/8088 switchover problem.

by dave04a＠dunfield.com

> My guess is that it is not transitioning into 8088 mode correctly. Figured it out - There is one fundamental difference between 16-bit mode of the CPU 8085/88 and the CPU 8086/8087. It needs RAM at FFFF0 in order to start correctly. With the 8086/8087 the Disk-1A puts it ROM at FFC00-FFFFF which boots the system. Since the 8086 has it's vectors at 00000, it never needs "high RAM" again. With the 8085/8088 the system starts in 8085 mode with the boot ROM at 00000. The loader (from disk) tries to write a JMP to FFFF0 before starting the 8088 - this was failing because I didn't have RAM there. Putting my 64k board at Fxxxxx cured the problem and now it boots CP/M-86 reliably. -- dave04a (at) Dave Dunfield dunfield (dot) Firmware development services & tools: www.dunfield.com com Collector of vintage computing equipment: http://www.parse.com/~ddunfield/museum/index.html

18 years, 11 months

DEC 874-A Power Conditioner

by henk.gooijen＠oce.com

Hi Richard, I have one 11/03, but AFAIK (I'm at work now) there is no switch on the front panel of the 03 to control on/off. However, if your 11/03 is mounted in a (small) rack you can add a simple plate with an on/off switch. Any small switch will be fine, because you switch approx. 20 VDC, not 230 VAC (or 115 VAC). All the power bus connectors have 3 pins, and they are all wired in parallel. IIRC, the middle pin is the return-GND, and when looking at the plug-in side of the socket on the power controller, the left one is power-on. A simple test will confirm this. Just set the small switch to "remote" and the short-circuit the 2 left-most pins. If the main relay "bangs" in you got the correct 2 pins :-) Wire the 2 pins to the small switch at the front side and you have made the remote turn-of/off option :-) - Henk. > Hey! This is sounding familiar! My 11/03 has an 861 power > controller on it and I have the three-position toggle switch > as well. Thanks for explaining what those settings are! I > had no idea what this meant when I first got the machine, but > I had the switch set to "local on" > and then the unit would power up. > > However, this idea that there's a way to powerup from the > front panel on an 11/03 intrigues me! Unfortunately I see no > obvious button that powers up the machine. Is this possible > with an 861 and if there is not existing switch, what would > you add to enable this feature? > -- > "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.

18 years, 11 months

Subject: AMD bit-slice machines

by bobalan＠sbcglobal.net

The Tektronix 4052 and 4054 series table top graphics computers were also 2901 based. Bob Message: 14 Date: Fri, 30 Dec 2005 18:20:30 -0700 From: Richard <legalize at xmission.com> Subject: AMD bit-slice machines To: cctalk at classiccmp.org Message-ID: <E1EsVQ6-0004lt-00 at xmission.xmission.com> Besides the Lilith Modula-2 workstation, what other computers were made from the AMD 29xx bit-slice architecture? --

18 years, 11 months

More RLV12/RL02 problems (faults on Write)

by charlesmorris＠direcway.com

Re: my PDP-11 (KDF11-BA QBus CPU) with RL02 and RLV12 controller: Although I can read from my RL02 fine, and run the various XXDP diagnostics, any attempt to *write* to the disk instantly causes the heads to retract, the LOAD light to go out, and the FAULT lamp to stay on. The write protect lamp works with the button and was not on. Running the diagnostics VRLB?? (Diskless Controller Test) & ZRLG?? (Controller Test 1) pass with no errors. However, ZRLH?? (Controller Test 2, the first test that writes to the disk) fails as follows: CZRLH DVC FTL ERR 00300 ON UNIT 00 TST 002 SUB 000 PC:015044 RLCS HAD FOLLOWING ERR(S): COMP DRV WRT OP-INTR MODE BEFORE COMMAND CS: 000313 BA: 003426 DA: 000000 MP: 000000 TIME OF ERROR: CS: 140312 BA: 004026 DA: 000001 MP: 000667 003400 174000 followed immediately by another fatal error "COMP OPI RD HDR OPR'TN-FLAG MODE". While the RL02 was still in Fault mode, I also entered the "Toggle-In Program" from the RL02 Disk Subsystem User's Guide, Appendix C and it returned 102210 which is WGE (Write Gate Error) i.e. either Write Protect was set, or a sector pulse occurred during the write operation. I think I should be looking inside the RL02 on the logic board but can someone with more diagnostic-pack experience tell me if this is actually a controller problem? thanks Charles

18 years, 11 months

HP logic analysers - IAs and utils?

by erik＠baigar.de

Hi Philip, thanks for your comments! > > Can the code be modified (e.g. is it possible to implement > > an other CPU?)? > The Inverse Assembler toolkit was on Agilent's FTP site a few > years ago. I'm not sure where you could get a copy now, though. > The assembler works fine on pretty much any machine, but IALDOWN > is very fussy. I did some search and was not able to get hands on a copy of the "Inverse Assembler toolkit". :-( But still I think, that the source code of IALDOWN might be interesting fo lot of people using 1600 analyzers. Since you used the NI library it should be easy to port it to other libraries: the NI library is somthing like standard for GPIB. Maybe I will be able to locate the "Inverse Assembler toolkit" in the future and than I'd be interested, too! Maybe the linux-gpib-project's people are interested as well (search for "hp1630 logic analyzer sourceforge" within google groups). Last but not least I consider the HP1600 analyzers very well suited for debugging and maintaining classic comps and I am happy to have one ;-) Best regards, Erik.

18 years, 11 months

Bitsavers mirror

by aek＠bitsavers.org

> Why isn't there a hint on bitsavers - like a cgi which calls "du > -h"....? The issue hasn't come up before. Generally people have asked before mirroring the site. It is around 43gb right now. Also, I'd prefer that people use ftp rather than things like Wget for mirror maintenance. Wget's of the whole tree sets off a bunch of red flags which normally results in your IP being blocked at the firewall (This happened twice today..)

18 years, 11 months

Beehive terminals

by legalize＠xmission.com

Does anyone have one? They apparently were crappy designs and tended to die fairly readily, making them hard to find. They were manufactured in Salt Lake, but I haven't seen one since I used them in Delaware around 1980! -- "The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ: <http://www.xmission.com/~legalize/book/> Pilgrimage: Utah's annual demoparty <http://pilgrimage.scene.org>

18 years, 11 months

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

by dm561＠torfree.net

From: "Roy J. Tellason" <rtellason at blazenet.net> Subject: Re: Speaking of 6502s, was Re: 70's micros still available - was 1802 problems <snip> >Big question for either of these, though, is source available? <snip> KIM and AIM65 data sheets, schematics & monitor source listings can be found on R. Cini's excellent site: http://highgate.comm.sfu.ca/~rcini/classiccmp/ m

18 years, 11 months

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test-drb January 2006