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101090 discussions

The inventor of the ARM chip donates first computer he ever built (40min video)

by lproven＠gmail.com

https://youtu.be/8_33Yv5LsSs Professor Steve Thurber -- co-inventor of the ARM processor, the BBC Micro and much more -- donates his first ever computer, and arguably the first prototype of the BBC Micro, to The Centre for Computing History in this fascinating (& very cute) video. https://youtu.be/8_33Yv5LsSs Well worth 40min of your time. -- Liam Proven ? Profile: https://about.me/liamproven Email: lproven at cix.co.uk ? Google Mail/Talk/Plus: lproven at gmail.com Twitter/Facebook/Flickr: lproven ? Skype/LinkedIn/AIM/Yahoo: liamproven UK: +44 7939-087884 ? ?R/WhatsApp/Telegram/Signal: +420 702 829 053

8 years, 9 months

Looking for TRS-80 Model parts (and/or someone in the Phoenix, AZ area)

by COURYHOUSE＠aol.com

is the 12 the thing that looks like a trs 80 mod 2 in size? if so i have some what is the history behind your unit!?!?!?!?!?!? Yes--- I am in Phx! Ed# In a message dated 4/23/2017 8:14:33 P.M. US Mountain Standard Time, cctalk at classiccmp.org writes: Just picked up a TRS-80 Model 12, and it boot to the "insert disk prompt" ... Yay! But, no card cage, and no KB (and no disks, but those might be easier to find) Found a seller of a model 12 with these items, but local pickup only. I'd like to get this unit up to the Model 16 specs, with Xenix on it. I see the cards are available, but without the cage, no joy. Jim -- Jim Brain brain at jbrain.com www.jbrain.com

8 years, 9 months

Vaxstation 3100 of odd sort on epay

by jnc＠mercury.lcs.mit.edu

> From: Jim Stephens > I'm interested in whether this is a wound down or ongoing Dec material > operation, or the operation of an e waste recycler. > Vendor name on ebay is EFI. May have other aliases. Oh, Efi! All hardened DEC collectors know about Efi (well, many of us do :-). They are indeed an ewaste recycler. Good people. The company name is ComUsed and/or TopLine. They used to be in Silver Spring (the place was the personification of 'gomi' from "Neuromancer" :-), but it got too small, so they moved. (Sniff. I miss the old place!) They got started on DEC stuff when they bought some DEC collector's entire collection after that person passed; most of that's long gone (it's been _thoroughly_ picked over :-), but they occasionally get more DEC stuff. Noel

8 years, 9 months

IBM 4331 Mainframe

by carlclaunch51＠gmail.com

> The 4361 is the real gem to get in this type of system. There is a > builtin storage director as well as the 4 port comm controller. The 4331 had an option for an integrated storage director, as well as a feature that converted between CKD and FBA for use with 3340 drives. The system Guy owns only needs the 3340 A2 and B2 drives cabled together and to the integrated director. Carl

8 years, 9 months

os8diskserver help?

by tomjmoss＠googlemail.com

Hi All, I'm in the process of building and restoring a PDP-8/e, and now I've got a second serial card I'd like to give OS/8 a try. I'm pretty sure I've got the boot loader entered properly, and the address + baud rates set correctly on the PDP and PC. When I start os8diskserver with "./os8disk -1 ../disks/diagpack2.rk05", it gives the welcome message. When I start the 8/e, It says: Booting... Done sending block 0 ^ and appears to freeze there. (the 8/e doesn't halt) I've got a RS-232 tester (blinky light box) hooked up to the port, which seems to indicate that nothing is being sent after Block 0 has been sent. Does anyone know what's going on, or what I'm doing wrong? Regards, -Tom

8 years, 9 months

Something for the P3 you have in your back yard

by aek＠bitsavers.org

http://www.ebay.com/itm/Vintage-Military-IBM-Computer-/201911842662 https://fas.org/man/dod-101/sys/ship/weaps/an-uys-1.htm

8 years, 9 months

Bulk tape eraser

by mloewen＠cpumagic.scol.pa.us

Looking for recommendations for a bulk tape eraser for SDLT and DLT IV tapes. Mike Loewen mloewen at cpumagic.scol.pa.us Old Technology http://q7.neurotica.com/Oldtech/

8 years, 9 months

Oscilloscope Recommendation

by shadoooo＠gmail.com

Hello, all fine with Rigol or similar oscilloscopes, but there's a very important technical specification that often is not considered, which really DOES the difference between a cheap oscilloscope and a powerful one: waveforms per second. Suppose you are searching for a rare glitch, or that you are trying to trace an edge of a signal with infinite persistence. If the scope is a DSO, it just takes a sampling window, the memory is full and requires data processing and display, in the meantime the signal is not analyzed, and you can lose important events. A DPO can capture the signal continuously, or at least with very short death time, and the display is updated using a large number of triggered sampling windows. Of course this kind requires a far powerful acquisition circuit. I really like DPO scopes in place of DSO, for example used Tek TDS540C or D, they are quite cheap, no electrolytic caps, and can be optionally expended to increase acquisition memory depth. Display is small and grey, but you can use a VGA monitor. My two cents. Andrea

8 years, 9 months

mx-80 for free

by db＠db.net

I found an Epson MX-80 in my pile of junque. I'd rather not ship but Ottawa, Montreal or Toronto are all possible. Otherwise, out to recycle. -- - db at FreeBSD.org db at db.net http://www.db.net/~db

8 years, 9 months

Oscilloscope Recommendation

by michael.99.thompson＠gmail.com

The RICM just received $1,000 to buy a new oscilloscope. I would like a four channel. and color would also be nice. The bandwidth doesn't need to be high because we usually work on ancient equipment. What would you suggest? -- Michael Thompson

8 years, 9 months

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