test-drb June 2015

test-drb@ccmp.vtda.org

165 participants
285 discussions

by michael.99.thompson＠gmail.com

> > Date: Mon, 15 Jun 2015 05:01:36 +0000 > From: tony duell <ard at p850ug1.demon.co.uk> > Subject: RE: PDP-12 Restoration at the RICM (tony duell) > > > > Tony, thank you for your offer to supply replacement M452 Variable Clock > > modules for the console. We already have one jumpered for 110 baud for > the > > Teletype. The other two M452 modules should be jumpered for 9600 baud and > > 38400 baud. The second serial port uses a M405 Crystal Clock module with > a > > Do you want 3 separate modules, or one switchable, or what? > > > different pinout and clock outputs than the M452. We don't have any of > > these modules, so the three that we need should be jumpered for 110 baud, > > 9600 baud, and 38400 baud. The shipping address for the RICM is on the > WWW > > page. > > Hang on. I thought the M405 was just a crystal oscillator without a > divider. Are > you sure there is no extra division on other modules? 110Hz is very slow > for > a crystal oscillator, after all. > > -tony > The M452 creates a 110 Hz clock for the TTY transmitter and a 880 Hz clock for the TTY receiver. The M405 for the DP12-B serial port generated a clock that is 16x the baud rate which is then divided by an M216 module. Michael Thompson

9 years

using new technology on old machines

by jnc＠mercury.lcs.mit.edu

> From: Dave G4UGM > Trouble is that although smaller SD cards were available they were way > more expensive (being discontinued and therefore rare and valuable).. One wonders why some manufacturer didn't realize there was money to be made in smaller cards (now less competition, but still enough demand to drive the prices up) and keep making them. Noel

9 years

UA11s

by ggs＠shiresoft.com

For a while now, folks have been asking me about UA11s. I've been putting them off because I'm sure I have some boards but can't find them until I unpack the "basement" of my new shop. I figured that I'd have done that by now but it's *still* not done. :-( So, in the name of customer service, I'm going to fab another round of UA11 boards (just the boards, you'll have to source all of the parts yourselves). So that I know how big an order to place, can folks contact me (off list please: ggs at shiresoft.com) on if you'd like a board (or two or ??). I just want to have a rough idea of what the demand is (ie should I order 10, 25, 100?). Thanks. TTFN - Guy

9 years

First VAX-11/730 VMS Boot! (was: Re: VAX-11/730 %BOOT-F-Unexpected Machine Check)

by cctalk＠beyondthepale.ie

> > > I'm having trouble with the password reset procedure (but will resolve it by > the end of this message). When I run AUTHORIZE, I get this: > [snip] > $ set noon > set noon > $ spawn /nowait sys$system:startup.com > spawn /nowait sys$system:startup.com > %DCL-S-SPAWNED, process SYSTEM_1 spawned > $ > %DCL-W-NOLBLS, label ignored - use only within command procedures > \SYS$SYSTEM:\ > %DCL-W-PARMDEL, invalid parameter delimiter - check use of special characters > \.COM\ Did I say that? I meant: $ spawn /nowait @sys$system:startup.com (sorry) Regards, Peter Coghlan.

9 years

Vaxstation 4000/60 autoboot

by marco＠familie-rauhut.eu

Hello list! I try to autoboot my Vaxstation 4000/60. The reason is that i want to drive the vax headless. I have set Disk DKA300 as boot hdd in console mode. I SET HALT 2 ( reboot). In this configutarion the system starts into SYSBOOT>. There i have to give the command CONTINUE to boot VMS. Is there any way to overide then CONTINUE command? Marco * Deutsch - erkannt * Englisch * Deutsch * Englisch * Deutsch <javascript:void(0);><#>

9 years

VAX 11/730

by emu＠e-bbes.com

As usual, a long shot, but anybody in the list like to get rid of one? Preferably Colorado ;-)

9 years

Front Panel Tech Note 2

by jnc＠mercury.lcs.mit.edu

> From: Rod Smallwood > I can tell you what they were called internally at DEC. > ... > They were called Toggles or Toggle switches and their use was called > 'Toggling' hence 'To toggle in the bootstrap' Maybe because on the older machines (e.g. PDP-1) they really were toggle switches? > From: Kyle Owen > I hear them referred to as handles. That would work. Still, it would be nice to find a front panel mechanical drawing and see what they are called on the BoM. (I tried to find one for the 11/20 front panel, and although I found the tech manual for it, I couldn't the print set for the front panel.) Noel

9 years

Fix for duplicate (and triplicate) messages on cctalk?

by cclist＠sydex.com

I know that others have discussed the issue, but can someone tell me concisely how to avoid multiple copies of the same message on cctalk? Overnight, 54 new messages arrived in my inbox. The problem was that I'd seem a large number of them a day or two before. What's the trick to keeping things simple, people? --Chuck

9 years

PDP-12 Restoration at the RICM (tony duell)

by michael.99.thompson＠gmail.com

> > Date: Sun, 14 Jun 2015 15:25:08 +0000 > From: tony duell <ard at p850ug1.demon.co.uk> > To: "General Discussion: On-Topic Posts" <cctech at classiccmp.org> > Subject: RE: PDP-12 Restoration at the RICM > > > Warren made an Arduino based programmable baud rate generator that works > > for both serial ports. After some debugging, it works nicely. > > I am sorry, but I find that obscene!. To use more components than the rest > of the machine > (probably) just for the baud rate clock is ridiculous. IMHO if you are > going to modify a > vintage machine, particularly one as rare as a PDP12, you should use the > components > that were available at the time. It's not as if a programmable buad rate > generator is hard > to make from TTL either. In fact given the Arduino thing needed 'some > debugging' it might > well have taken less time to do it in hardware. > > -tony > Tony, thank you for your offer to supply replacement M452 Variable Clock modules for the console. We already have one jumpered for 110 baud for the Teletype. The other two M452 modules should be jumpered for 9600 baud and 38400 baud. The second serial port uses a M405 Crystal Clock module with a different pinout and clock outputs than the M452. We don't have any of these modules, so the three that we need should be jumpered for 110 baud, 9600 baud, and 38400 baud. The shipping address for the RICM is on the WWW page. -- Michael Thompson

9 years

Updates

by ggs＠shiresoft.com

I know some folks have been trying to get in touch with me for a while and I want to apologize for not getting back in touch with folks before now. The short and long of it has been the fact that first my wife had health issues, then I had health issues and finally in the middle of all of this my ISP decided to move me to a new static IP block which caused my email to be on various black-lists that took a while to get off of (so I could *see* the emails, I just couldn't respond). So, that's why folks haven't heard from me. Up until the above, I had been making steady progress on the MEM11 code. Right now I have most of the forth code written along with a J1 simulator (written in forth). I was in the process of debugging the simulator when all of the above occurred and I haven't been able to get back to it yet. I hope to start on it again in the next few weeks. TTFN - Guy

9 years

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test-drb June 2015