test-drb

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101090 discussions

by elson＠pico-systems.com

The Bendix G-15 was conspicuously left out, although I think it meets all the requirements. it was the size of a refrigerator, weighed 800 Lbs, had several K of drum memory (not "RAM") had an IBM executive typewriter for I/O, and ran a version of Algol. Jon

11 years, 5 months

Who built the first minicomputers?

by rickb＠bensene.com

What about the Bendix G15? Introduced in 1953. Definitely fits the criteria outlined in the article. Not that I agree with the article..like many others here feel, the term `first` in a historical context is too fraught with issues of definition. Rick Bensene -----Original Message----- From: Chuck Guzis [cclist at sydex.com] Received: Friday, 24 Jan 2014, 9:17AM To: General at bensene.com [General at bensene.com]; Discussion at bensene.com:On-Topic and Off-Topic Posts [cctalk at classiccmp.org] Subject: Re: Who built the first minicomputers? I'm surprised that the Packard-Bell PB250 wasn't considered. It could run from a standard US lighting circuit. Circa (IIRC) 1959. Not a drum machine, but used a recirculating magnetostrictive memory. It also seems that there may have been a few military computers that would satisfy your criteria. As Will has stated "first" is a very dangerous word and "minicomputer" is, in fact, a term of art. Like pornography, it's what it is because someone says so. --Chuck

11 years, 5 months

1/10th speed PDP-11/40 simulator on ATmega2560

by ethan.dicks＠gmail.com

Found via Hack-a-Day just now... https://github.com/davecheney/avr11 It apparently can handle booting v6 UNIX on an emulated RK05 at about 10% the speed of real hardware. It requires a custom sheild to add a couple of 8-pin SPI RAM chips. Directions for that are said to be coming soon. -ethan

11 years, 5 months

Booting my PDP-8A, so close yet..

by cramcram＠gmail.com

I've got a PDP-8A with RK05's and a TC08/TU56. I've verified the serial port is okay (via checkser), loaded focal with the rim loader and run both read and write tests on a RK05 pack. I've done a restrk05 with both diagpack2.rk05<http://www.pdp8online.com/pdp8cgi/os8_html?act=dir;fn=images/os8/diagpack2.…> and haygood-osv3r.rk05<http://www.pdp8online.com/pdp8cgi/os8_html?act=dir;fn=images/os8/haygood%2D…>. It seems to progress ok, counting up to the last cylinder and leaving the AC equal to 0 when done. However when I execute the two word bootstrap for the RK8E I hear the drive seek once and then stop at location 0031. I've also tried a restore with the TC08 but it never even gets to the point that the drive gets selected (the SR is 0 on entry). However if I punch in the TC08 bootstrap unit 0 does a rewind, then goes forward (with lots of das blinken lights), goes past quite a few blocks and then halts (this is on a tape that claims to have OS8 on it). The RK05 is most frustrating since it passes the rw tests (9 passes) but doesn't boot. I guess I'm going to be loading in some maindecs unless someone out there has any other ideas. Thanks, Marc

11 years, 5 months

Alcon surgical laser S-100 board

by alexandre.tabajara＠gmail.com

Dear sirs, I'm looking for education, since I know nothing about S-100 I got some boards from an Alcon surgical laser, and they SEEMS TO BE clearly S-100-compatible. The CPU board uses an 8085, with ROM mapped from $1000 on. BIN avaiable upon request. Since I'm a complete n00b about S-100 systems, how can I positively identify this board as a S-100 compatible board, and what are the minimal connections I can use for, at least, make it tick? (now I understand the need to learn more about CPU emulators and how to integrate "blocks" of code to emulate an unknown computer easily) Thanks Alexandre Souza

11 years, 5 months

Who built the first minicomputers?

by rickb＠bensene.com

Correction...the G15 was introduced in 1956. Rick Bensene -----Original Message----- From: Rick Bensene [rickb at bensene.com] Received: Friday, 24 Jan 2014, 10:18AM To: cctalk at classiccmp.org [cctalk at classiccmp.org] Subject: RE: Who built the first minicomputers? What about the Bendix G15? Introduced in 1953. Definitely fits the criteria outlined in the article. Not that I agree with the article..like many others here feel, the term `first` in a historical context is too fraught with issues of definition. Rick Bensene -----Original Message----- From: Chuck Guzis [cclist at sydex.com] Received: Friday, 24 Jan 2014, 9:17AM To: General at bensene.com [General at bensene.com]; Discussion at bensene.com:On-Topic and Off-Topic Posts [cctalk at classiccmp.org] Subject: Re: Who built the first minicomputers? I'm surprised that the Packard-Bell PB250 wasn't considered. It could run from a standard US lighting circuit. Circa (IIRC) 1959. Not a drum machine, but used a recirculating magnetostrictive memory. It also seems that there may have been a few military computers that would satisfy your criteria. As Will has stated "first" is a very dangerous word and "minicomputer" is, in fact, a term of art. Like pornography, it's what it is because someone says so. --Chuck

11 years, 5 months

IBM 3179

by aek＠bitsavers.org

http://www.ebay.com/itm/380684482851 the seller is 'special' he had useless pictures, updated them at my request, then realized that there was a market for just the keyboards, pulled them off and now is selling them separately for $50 I'm sorry I even asked Anyway, if someone else is looking for one for $150, here's your chance.

11 years, 5 months

NS405, NS455 (was Re: NEC uPD7201C Datasheet, Pinout?)

by spacewar＠gmail.com

On Jan 20, 2014 2:07 PM, "Holm Tiffe" <holm at freibergnet.de> wrote: > Next interesting thing are 10 pcs. of NS405-B18N, a sticker says that that > are display processors, someone knows where tehy where used in? To a first approximation, nowhere. Ciarcia used it in the TERM-MITE construction article in the Feb. 1984 issue of BYTE, reprinted in _Ciarcia's Circuit Cellar, Vol. 7_. There's also an NS455 variant, and alternate part numbers (e.g. NS32045). They have an enchanced 8048 core and a text-oriented CRT controller.

11 years, 5 months

Generic monitor ROM...

by geneb＠deltasoft.com

Does anyone here know where I could find a "generic" monitor ROM that could be tweaked for the target system? I'm looking for something that would fit in a 4K EPROM. tnx. g. -- Proud owner of F-15C 80-0007 http://www.f15sim.com - The only one of its kind. http://www.diy-cockpits.org/coll - Go Collimated or Go Home. Some people collect things for a hobby. Geeks collect hobbies. ScarletDME - The red hot Data Management Environment A Multi-Value database for the masses, not the classes. http://scarlet.deltasoft.com - Get it _today_!

11 years, 5 months

Vintage-computer.com

by barythrin＠gmail.com

The forums have a maintenance announcement up last time i checked an hour or so ago so hopefully some planned maintenance is going on. It didnt specify any eta but they're (or Erik) usually pretty quick to get things up.

11 years, 5 months

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