test-drb November 2018

test-drb@ccmp.vtda.org

150 participants
133 discussions

by dkelvey＠hotmail.com

I have a question. I use the USB port for serial. In my program, I use a fixed com port. When going to the control panel, I find that I see (in use) tags on some of the com ports. I'm the only one currently using the com ports but recently another (in use) showed up, requiring me to modify my program to use another com port. How does one unuse a com port? how do I find out what is using it so I can stop it? I'm using windows 7 professional. Has anyone else had this problem? Dwight

5 years, 5 months

HP-Apollo 9000/425t RAM

by cmhanson＠eschatologist.net

I?ve come into an HP-Apollo 9000/425t which uses memory boards with 72-pin headers rather than using SIMMs. Based on what I can see in pictures online, the boards themselves don?t appear to be anything special (they just carry TMS444000 etc. DRAM) and the connections aren?t anything special either, so I figure it shouldn?t be hard to design a SIMM adapter. Does anyone have or know where I could find the pinout and timings? -- Chris

5 years, 5 months

IBM 3270 Emulation Adapter (ISA)

by pat＠vax11.net

I'm wondering if anyone knows where to find a copy of some software to make an IBM 3270 Emulation Adapter (the short ISA one) useful. I hear that IBM's PCOMM/3270 2.0 - 4.0 or so will work (on DOS) with the card. Pat

5 years, 5 months

RT-11 DY install

by dstalk＠execulink.com

I'm trying to use a simulated RX02 disk (under simh) with RT-11 and can't seem to get the DY driver to install. Here's the relevant log: sim> set ry enabled sim> att ry0 ry0.dsk RY: creating new file RY: buffering file in memory sim> c .install dy ?KMON-F-Invalid device installation DL0:DY.SYS .dir dy.sys DY .SYS 4P 20-Dec-85 1 Files, 4 Blocks 14841 Free blocks I've tried with 2 different software "kits", the one from the simh site and the one from bitsavers. Any ideas? Thanks, Don

5 years, 5 months

early ANSI C drafts, pre-1989 standard

by spacewar＠gmail.com

I'm interested in looking at any published drafts prior to the C 1989 standard. I found X3J11-88-090 here: https://yurichev.com/ref/Draft%20ANSI%20C%20Standard%20(ANSI%20X3J11-88-090… That makes mention of the previous draft being X3J11-88-001. Does anyone still have a copy of that draft, or other pre-89 drafts? I'm not looking for any of the published standards (I've purchased them), nor any drafts after the 1989 standard. Eric

5 years, 6 months

Font for DEC indicator panels

by jnc＠mercury.lcs.mit.edu

> From: Paul Koning >> The DEC font uses a zero with a slash > For that, a capital O with a slash would probably serve. Actually, it turns out that only earlier panels (e.g. KA10, TC08, etc) use the slashed zero; later ones (KI10, RP11, etc) use the ordinary ones. Since our panel is intended for use with the RPV11-D, the unslashed is OK. Thanks to all for all the help with the font; did anyone have any comments on the _layout_ of the inlay (here: http://www.classiccmp.org/pipermail/cctalk/2018-November/043285.html for those who missed it among all the other messages). Noel

5 years, 6 months

HP 88780B density

by kevin.bowling＠kev009.com

I have a dual density 88780B. Is it possible to upgrade to quad density by acquiring/swapping boards? Or does someone have an 800bpi 9-track on SCSI Incan borrow or buy? I have a pair of 1984 pdp11/70 UNIX SysV (R0, R1?) tapes that need to be archived. Regards, Kevin

5 years, 6 months

TU58 tape formatter (was Re: rebuilding DC100A cartridges?)

by shadoooo＠gmail.com

Hello. I have a VAX730 with both TU58 drives destroyed (capstan melted, need replacements). I also have a bunch of cassettes, but unfortunately all seem to have problems with the bend and/or bad spots on the tape. Possibly I would try to replace the broken bands (if I find a source) and/or replace the magnetic tape when damaged (I was thinking to try with audio cassette tape, don' t know if metal oxide high density tape could be good for it). Anybody has some information about the coercivity of original DEC TU58 tape? One problem indeed is the need of reformatting the tape, but: if I can emulate the TU58 drive using a serial, would it be possible to send raw commands to the drive using the serial and a PC? Andrea PS-If possible, some good-condition cassette would be very useful to me too. I'm located in Italy.

5 years, 6 months

The fundamental building block of modern digital design turns 100 https://spectrum.ieee.org/geek-life/hands-on/recreating-the-first-flipflop

by couryhouse＠aol.com

YIPPEE? ?A? Birthday? Party! The fundamental building block of modern digital design turns 100 ? https://spectrum.ieee.org/geek-life/hands-on/recreating-the-first-flipflop

5 years, 6 months

VAX 9440

by cctalk＠snarc.net

The VCF museum took delivery of a VAX 9440 today. It arrived in two 28-foot trailers. Here's our forklift driver beginning to unload the first truck: https://drive.google.com/file/d/1E-Q5xrsYXyjrZEZh92xIBhlStvvNUcRV/view?usp=… Here's a teaser picture of the main cabinet: https://drive.google.com/file/d/1bEpSMzBEeOvuDnzPQ9Npc7iYmDhjZq8c/view?usp=… The full system is 30-40 feet long when it's all set up! It is in pristine condition and was in service at a defense contractor until a couple of months ago. Rumor has it that we arranged for another one to land in Dave McGuire's Large Scale Systems Museum collection, and a third to be with Bob Roswell's System Source collection. :) Perhaps they'll post updates too!

5 years, 6 months

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test-drb November 2018