test-drb March 2015

test-drb@ccmp.vtda.org

167 participants
224 discussions

by dfnr2＠yahoo.com

I thought my latest little retrocomputing project might beof interest.?A few weeks ago, our accounting department trashed some oldequipment that had been in a closet sine the 70?s.? Because it was all fully depreciated long ago, the stuff wasup for grabs.? Most of it was junk,but they did have 5 HP 9100B calculators that seemed to be in pretty goodphysical shape.? These are from the1960?s, and are pretty huge for a calculator, by today?s standards.? I tried them all, and they all seemedto have some pretty weird behavior.?When you hit the ?+? key, it doesn?t wait for another number, butinstead adds the last row directly to the second row.? I suppose that?s why these have been out of commission allthese years.? View image: Strange calculator behavior | ? | | ? | | ? | ? | ? | ? | ? | | View image: Strange calculator behaviorhttp://postimg.org/image/rnyl9uexz/ Link copy to clipboard http://s23.postimg.org/otvfwecrv/Strange_calculator_behavior.jpg Direct Link copy to clipboard ? | | | | View on postimg.org | Preview by Yahoo | | | | ? | I figured since they are free, I?d pick one up and find aproject for it.? They do have somepretty cool cases.? They had someprinters as well, off in a corner, but I was more interested in using thecalculator as the basis for some kind of retrocomputing project, and theprinters were not compatible with anything else, so I passed.?This weekend, while cleaning up the lab, I came across anold Jumptec PC104 form-factor board with a 486 processor and an add-on LCDcontroller.? I figured this couldbe the perfect ?upgrade? for the 9100B.?Luckily, the HP machine was very well designed, and easy todisassemble.? I was very easilyable to fit the PCM-104 stack, a power supply, screen, SD card, and HappyHacking keyboard.? Almost a perfectfit!!?View image: Out with the old, in with the new!! | ? | | ? | | ? | ? | ? | ? | ? | | View image: Out with the old, in with the new!!http://postimg.org/image/6051lnp5z/ Link copy to clipboard http://s23.postimg.org/5am99aomj/Out_with_the_old_in_with_the_new.jpg Direct Link copy to clipb... | | | | View on postimg.org | Preview by Yahoo | | | | ? | Of course, no retro-computer is complete without a properretro-operating system.? Here youcan see the project in near final shape, running windows 95Perhaps some time inthe future, I?ll upgrade this to a more modern processor, but for now, justpure retrocomputing goodness! View image: Up and running, retro style! | ? | | ? | | ? | ? | ? | ? | ? | | View image: Up and running, retro style!http://postimg.org/image/xm7t6c8iv/ Link copy to clipboard http://s23.postimg.org/ki28tngh7/Up_and_running_retro_style.jpg Direct Link copy to clipboard ? | | | | View on postimg.org | Preview by Yahoo | | | | ? | ?Future upgrades include:??????Laser-cutting or 3d-printing a proper faceplatefor the keyboard, and transplanting the keyboard PCB directly to the case.??????Adding some LED strip-lighting for a morestriking presentation.?Let me know what you think!?Dave

9 years, 1 month

Installing a TF85 into a BA440 Enclosure

by robert.jarratt＠ntlworld.com

I have a TF85 I want to install into a BA440 enclosure. I took the mounting rails from a TK70 and combined it with the small board from an RF drive which has the DSSI cable and a power cable. I plugged the power cable into a socket on a board attached to the drive. The drive itself has another power socket. I assumed it was getting power from the socket on the board attached to the drive, but when I power on the machine, the tape drive itself appears not to get any power. Is there supposed to be a special board that goes into the mounting that has *two* power cables? I have tried to find documentation on this but have not been able to find anything. Thanks Rob

9 years, 1 month

cctalk Digest, Vol 5, Issue 28

by mark＠markesystems.com

Date: Fri, 27 Mar 2015 23:02:59 +0200 From: Johannes Thelen <johannesthelen at hotmail.com> To: "General Discussion: On-Topic Posts" <cctech at classiccmp.org> Subject: RE: Huge IBM 1800 find (and need some help) Oh, the pictures: https://drive.google.com/folderview?id=0B_DR111cK6W-SFJpMm16MVgyVFk&usp=sha… Wow! That's fantastic!!! 20150327_121311.jpg ~~ Mark Moulding

9 years, 1 month

PDP-8I front panel clone project

by dave＠661.org

I figured a goodly number of folks here would appreciate this: http://hackaday.com/2015/03/26/hackaday-retro-edition-remaking-the-pdp-8i-w… It's a clone of a PDP-8I front using modern parts and driven by Raspberry Pi running SIMH. -- David Griffith dave at 661.org A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail?

9 years, 1 month

FFS: 2x Vishay Siliconix DG506AR Single 16Ch/Differential 8Ch CMOS Analog Multiplexer

by dave＠661.org

I have two Vishay Siliconix DG506AR Single 16Ch/Differential 8Ch CMOS Analog Multiplexers free for shipping. I tried selling them on Ebay and got no nibbles at all. These are white-ceramic with white lids. I found them in a small box labeled as though they were free samples from Vishay. The foam appears to have consumed a bit of the gold, but they should work okay. See them in https://www.flickr.com/photos/32548582 at N02/sets/72157647852420954/. Note: I'm keeping that curious-looking paper tape punch. -- David Griffith dave at 661.org A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail?

9 years, 1 month

Dilog SU723A

by shadoooo＠gmail.com

Hello, if you have a place where I can upload, no problem for a couple of images. Andrea

9 years, 1 month

TRU64 UNIX

by jim＠g1jbg.co.uk

Hi, I'm looking for someone in the UK with commercial experience of TRU64 UNIX, preferably with ORACLE, if anyone can help, please let me know. Regards Jim.

9 years, 1 month

Looking for an RX2620 Bezel

by robert.jarratt＠ntlworld.com

I would like to find the front bezel for a HP RX2620. The one I have has the tabs that hold it in place broken off. There is one on Ebay, but with postage from the US it adds up. Does anyone have one in the UK that they are willing to part with? I also wouldn't mind finding an optical drive for this machine, they seem pretty hard to find, so again, anyone have one to spare? Thanks Rob

9 years, 1 month

cable for KV8-I video display (PDP-8/I)

by j＠ckrubin.us

I'm looking for a "Dual I/O cable assembly", DEC part number D-IA-7006289-0-0. This cable links a PDP-8/I with the KV8-I graphics display option to a VT01 display and an H306 joystick. All I know at this point is that the cable connects to the 8/I via a G778 interface card and terminates at the other end in a 25-pin Cannon connector for the display (actually a Tek 611 display monitor) and a 9-pin Amphenol connector for the joystick. Does anyone have one of these display systems? I would be happy to find the cable but short of that, it would be a big help to have more info on the G778 interface card so I can build a cable. Thanks, Jack

9 years, 1 month

Dilog SU723A

by shadoooo＠gmail.com

Hello, I just received from a friend a Dilog SU723A, but I don't find any documentation about it. The board is rev.D and has two 50 pin connectors on top... which one should be used? From a quick look at the ICs on the PCB, I suspect one connector is for single ended, the other for differential SCSI, but I'm not sure about it... Anybody has some info / manual / other ROM dumps? My ROM image is available if somebody is interested on it. As I suspect that the same board could support also SU726A, if would be nice if somebody has ROMs and/or PLA dumps, could be interesting in being able to switch between features. Thanks Andrea

9 years, 1 month

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test-drb March 2015