[cctalk] Re: Thirties techies and computing history

2024-05-19 Thread Joshua Rice via cctalk
Well my interest in computers started in my teens. I liked tinkering with hardware and playing with OSes, but growing up in the 2000's, the technology landscape had already "stagnated" into PC dominance. I suppose there's only so much messing with Linux and other FOSS operating systems you can

[cctalk] Re: Thirties techies and computing history

2024-05-19 Thread Joshua Rice via cctalk
Younger folk are indeed more ignorant of where technology came from, but i wouldn't say all of them are. I'm 32 years young and, well, i'm posting this email on the mailing list, so that probably says enough. Sure, the pool of those interested in old computer tech might be smaller nowadays

[cctalk] Re: Double Density 3.5" Floppy Disks

2024-05-01 Thread Joshua Rice via cctalk
Disk drive. On 4/30/2024 12:20 PM, Joshua Rice via cctalk wrote: On 30/04/2024 18:08, Anders Nelson via cctalk wrote: Having grown up with 1.44MB 3.5" floppies, I have a question: is it possible to use a 1.44MB disk and just format it as a 720K disk? I think it's entirely possible. I'd definit

[cctalk] Re: Double Density 3.5" Floppy Disks

2024-04-30 Thread Joshua Rice via cctalk
On 30/04/2024 18:08, Anders Nelson via cctalk wrote: Having grown up with 1.44MB 3.5" floppies, I have a question: is it possible to use a 1.44MB disk and just format it as a 720K disk? I think it's entirely possible. I'd definitely format them in a 720kb drive though to be extra safe.

[cctalk] Re: PCs in home vs businesses (70s/80s)

2024-04-27 Thread Joshua Rice via cctalk
I'm a youngster when it comes to this hobby, being manufactured myself in the early years of the 90's. As such i cannot really quote from my experiences "at the time", but i have spent many an hour tinkering with old machines and researching for this vintage (and modern) computing hobby of

[cctalk] Re: Drum memory on pdp11's? Wikipedia thinks so....

2024-04-16 Thread Joshua Rice via cctalk
On 15/04/2024 15:00, Bill Degnan via cctalk wrote: I'll bet the source was talking about large contemporary storage units that looked like drums or may have been called "drums" but were not actual 50's drum memory with tubes and such. There was no rotating drum storage, the media rotates in

[cctalk] Re: Intel 4004

2023-11-21 Thread Joshua Rice via cctalk
On 21/11/2023 09:03, ED SHARPE via cctalk wrote: So what are the other contenders and what do they bring to table The 4004 was definitely the first commercially available single-chip CPU on the market, but if you include multi-chip LSI designs, the lines get blurry.

[cctalk] Re: The World Wide Web

2023-10-02 Thread Joshua Rice via cctalk
LTO-9 is probably not the best route for "Sneakernet" transfers. When Tanenbaum uttered that famous quote, tape was still relatively fast (at least sequentially), as well as it having unparalleled capacity. Nowadays, if you were to do large-but-fast data transfers, i'd chuck all the data on a

[cctalk] Re: For Fred, especially: "Everything I know about floppy disks"

2023-09-10 Thread Joshua Rice via cctalk
On 09/09/2023 00:02, Fred Cisin via cctalk wrote: It's odd that he brings up things such as 100tpi drives (VS 96tpi) and 3" (but not 3.25" on which Dysan bet the company), the very early 40 track 3.5", -- Grumpy Ol' Fred ci...@xenosoft.com What confused me, is that i believe the

[cctalk] Re: Friden (was Silly question about S-100 and video monitors)

2023-09-01 Thread Joshua Rice via cctalk
On 01/09/2023 19:39, Paul Koning via cctalk wrote: There's actually a pull in two opposite directions. One is to put more stuff within a chip (System On Chip approach) and make the interconnects inside very wide, perhaps an entire L1 cache line wide. The Raza/NetLogic/Broadcom XLR and its

[cctalk] Re: Apple 1

2023-08-05 Thread Joshua Rice via cctalk
Value is a very much reliant on both desirability and historical significance. I guarantee most people who own an Apple 1 never use it, and it sits in a cabinet/shelf somewhere. Transversely, I’m sure there’s very few Amiga 1200’s purely on display, with the vast majority in collectors hands

[cctalk] Re: Getting floppy images to/from real floppy disks.

2023-05-28 Thread Joshua Rice via cctalk
-- Original Message -- From: "Tony Duell via cctalk" To: "General Discussion: On-Topic and Off-Topic Posts" Cc: phi...@axeside.co.uk; "Tony Duell" Sent: Sunday, 28 May, 2023 At 07:17 Subject: [cctalk] Re: Getting floppy images to/from real floppy disks. I suspect USB-SCSI

[cctalk] Re: Super I/O chips and Getting floppy images to/from real disks

2023-05-24 Thread Joshua Rice via cctalk
What op sys and version do you want to run on it? Windows changed the way drivers work after Xp so it may be an isshe. That made replacement of older PCs that controlled equipment like xray, MRI, and industrial stuff impossible as the manufacturers couldn’t write new drivers — lost the

[cctalk] Super I/O chips and Getting floppy images to/from real disks

2023-05-24 Thread Joshua Rice via cctalk
Interestingly, i'm looking at procuring a reasonably vintage laptop for a computer festival i'm planning to attend soon. It seems that many laptops of the PIII era use SuperIO chips, but i'm rather confused as to how "low level" they get. Some of you may remember my RCA MS2000. I've had

[cctalk] Re: Getting floppy images to/from real floppy disks.

2023-05-18 Thread Joshua Rice via cctalk
> > My advice: buy an old desktop computer. Buy a standard PC floppy drive (a > dual drive if possible to give both 3.5 and 5.25 support). Then run Linux, > use the "fdparm" tool to set the media format if necessary, and copy the > image with "dd". > > Roughly speaking this is how I read

[cctalk] Re: Using Teledisk 2.16 to read old RX50 images

2023-05-16 Thread Joshua Rice via cctalk
I’ll chip in my 5 cents and say that i’ve had good experiences with PUTR, a DOS based utility can can read, write, and mount a lot of DEC formats. I quite successfully used it to make myself a few bootable RX50 floppies for my 11/23. Of course, YMMV, and you’ll need a DOS/9x machine to use it,

[cctalk] Re: what is on topic?

2022-12-23 Thread Joshua Rice via cctalk
The subject to f that is and what isn’t vintage computing is an argument as ancient as the computer itself. Fact is, it’s a moving target. As every year passes, products you can categorise as “vintage” changes at different rates. For example: IBM PC’s have largely standardised and “stagnated”

[cctalk] Re: Soviet PDP clones

2022-10-18 Thread Joshua Rice via cctalk
-- Original Message -- From: "Holm Tiffe via cctalk" To: "General Discussion: On-Topic and Off-Topic Posts" Cc: "Holm Tiffe" Sent: Tuesday, 18 Oct, 2022 At 08:45 Subject: [cctalk] Re: Soviet PDP clones Joshua Rice via cctalk wrote: Hi all, After s

[cctalk] Soviet PDP clones

2022-10-17 Thread Joshua Rice via cctalk
Hi all, After some discussion on reddit about russian PDP-11 clones, i made the (perhaps erronous) claim that the PDP series in general was cloned by the Soviets. I’m aware that there was a lot of QBUS/LSI PDP-11 clones, and depite poor documentation, there is significant evidence of PDP-8

[cctalk] Re: Xerox 820II U07 Power Supply magic smoke....

2022-10-13 Thread Joshua Rice via cctalk
You shouldn't need a schematic. These thin film caps are a common failure mode on a multitude of PSUs. Just replace like for like. Thin film X and X2 rated caps are easily found from your favorite electronics part retailer. If it's gold and got RIFA on it, replace it, though. Just because

[cctalk] Re: Minicomputer front panel.

2022-09-26 Thread Joshua Rice via cctalk
-- Original Message -- From: "Adrian Stoness via cctalk" To: "General Discussion: On-Topic and Off-Topic Posts" Cc: "Adrian Stoness" Sent: Sunday, 25 Sep, 2022 At 14:42 Subject: [cctalk] Re: Minicomputer front panel. yea was found in the mud the press board preic spent a few yrs

[cctalk] Re: Minicomputer front panel.

2022-09-23 Thread Joshua Rice via cctalk
> On Sep 23, 2022, at 5:45 PM, Chuck Guzis via cctalk > wrote: > > I thought it curious that many 1960s-1970s supercomputers lacked front > panels and blinking lights altogether.(e.g. Cray I, CDC > Cyber/600/700, etc.) Indeed, the Cray couldn't even spin a tape without > help from

[cctalk] Re: Minicomputer front panel.

2022-09-22 Thread Joshua Rice via cctalk
It is sacrelege! In all honesty, real front panels are expensive. An 11/40 front panel sold recently on eBay for $2000! (https://www.ebay.co.uk/itm/314122754771 ) They’re also hard to come by, and most that have them are going to be very reluctant to

[cctalk] Re: Flipping an 8" diskette

2022-09-02 Thread Joshua Rice via cctalk
-- Original Message -- From: "Fred Cisin via cctalk" To: "Chuck Guzis via cctalk" Cc: "Fred Cisin" Sent: Friday, 2 Sep, 2022 At 01:45 Subject: [cctalk] Re: Flipping an 8" diskette Didn't HP continue to say "disc"? MOST switched to "disk". HOWEVER, the strong influence of Philips on

[cctalk] Re: Dec rl02 disk pack shelf design

2022-08-09 Thread Joshua Rice via cctalk
I have definitely seen pictures of them stacked edge-on. Since they were essentially identical physically to the IBM 5440 disk packs (though formatting would be wildly different), i imagine that might be a good place to start in regards to existing designs. Alternatively, it should be

[cctalk] Re: VT220 North of Boston

2022-08-09 Thread Joshua Rice via cctalk
You say that, but Galway is just a county over, and DEC had a large manufacturing base there. It's entirely possible for there to be a VT220 rotting in someones loft or barn in the vicinity of Boston, Ireland. I believe this is on the same isle, and the same state

Re: Free stuff in Somerset, England

2022-06-28 Thread Joshua Rice via cctalk
Times like this make me wish i could drive... I'm not even that far away, just down from Bournemouth. I'd be very interested in the 11/10 and the VT100 though, if only i could figure out a way to collect them. Good luck to all anyway. And if anyone is going past Bournemouth on the way here,

Re: RCA COSMAC MS2000 MicroDisk Development System

2022-04-19 Thread Joshua Rice via cctalk
On with the saga of the COSMAC MS2000… I powered it up a few days ago. The ROM boots, nothing smoked, the drives whirr. However, one of the RAM boards (the lower 32k) seems to have failed with a stuck bit. it outputs the rather humourous message of BAD RAM P00 (where P00 is memory page 00h).

Re: Felt pads for RX50

2022-04-19 Thread Joshua Rice via cctalk
Never had to replace them, but from what i remember, from cleaning out an RX50 last year... they're thinner than cassette tape felt pads. I imagine sticky back craft felt would be an adequate replacement. Cutting it/stamping it out might be the tricky part.

Re: RCA COSMAC MS2000 MicroDisk Development System

2022-04-09 Thread Joshua Rice via cctalk
I’ve torn it down this morning and put some pictures on Imgur. https://imgur.com/gallery/xwSvG8A Should be fairly comprehensive. It looks in good condition, with nothing obviously wrong with it. If there’s anything i’ve missed, or that you’d like better

Re: RCA COSMAC MS2000 MicroDisk Development System

2022-04-08 Thread Joshua Rice via cctalk
-- Original Message -- From: "geneb" https://i.imgur.com/Q96sRhE.jpg Nice find! g. No, it looks like this: https://imgur.com/gallery/bHYFoBV -- Original Message -- From: "David Schultz" You didn't mention my web page:

Re: RCA COSMAC MS2000 MicroDisk Development System

2022-04-08 Thread Joshua Rice via cctalk
From: "Bill Degnan via cctech" ...but I bet yours is more like 1976-77. What is the CPU type 1802 or something else? It's definitely an 1802 family CPU, not sure of exact model, but i'll find that out later when i tear it down (and document/post it here). However, it's much newer than '77.

RCA COSMAC MS2000 MicroDisk Development System

2022-04-07 Thread Joshua Rice via cctalk
Hi all, I’ve recently come across something i’ve soon realised really quite unusual. An RCA MS2000 MicroDisk Development System. I’m very green to the COSMAC scene, with this being my first 1802 machine. I’m very interested in knowing the pitfalls i may come across in restoring such a

Re: Glass memory?

2022-04-07 Thread Joshua Rice via cctalk
From: "steven--- via cctech" Paul and others said What if you can't make ICs any more? Or rather, what level of IC fabrication would it be possible to construct from scratch? For semiconductors, you'd start with machinery to make ultra-pure materials (silicon, I'd assume). A Czochralski

Re: Core memory

2022-04-01 Thread Joshua Rice via cctalk
> On Apr 1, 2022, at 7:51 PM, Paul Koning via cctalk > wrote: > > Neat looking stuff. It doesn't look like core rope memory in the sense of > the AGC ROM, nor in the sense of the Electrologica X1. It looks more like > the transformer memory used in Wang calculators that you documented in

Re: PDP 11/24 - A Step Backwards

2022-03-29 Thread Joshua Rice via cctalk
-- Original Message -- From: "Chris Zach via cctalk" To: r...@jarratt.me.uk; "'General Discussion: On-Topic and Off-Topic Posts'" Sent: Tuesday, 29 Mar, 2022 At 00:11 Subject: Re: PDP 11/24 - A Step Backwards I have been reluctant to put everything back in, in case the PSU fries

Re: LSSM is chasing this, was Re: General Data? Computer Equipment Auction - GSA

2022-03-18 Thread Joshua Rice via cctalk
-- Original Message -- From: "Dave McGuire via cctalk" To: "P Gebhardt" ; "cctalk" Sent: Thursday, 17 Mar, 2022 At 21:37 Subject: Re: LSSM is chasing this, was Re: General Data? Computer Equipment Auction - GSA As I've said privately today to three people who have emailed me

Re: Does anyone/museum test disk packs?

2022-03-17 Thread Joshua Rice via cctalk
-- Original Message -- From: "Bill Gunshannon via cctech" To: cctalk@classiccmp.org Sent: Thursday, 17 Mar, 2022 At 14:32 Subject: Re: Does anyone/museum test disk packs? On 3/17/22 09:33, Chris Zach via cctalk wrote: Modern disks still have a filtration system and airflow within the

Re: 11/83 operating system load update -2

2022-02-23 Thread Joshua Rice via cctalk
> On Feb 23, 2022, at 6:04 PM, Chuck Guzis via cctalk > wrote: > > If running 98 or 95, just do a "shutdown to MS-DOS prompt", rather than > opening a DOS Window and you'll be fine. > > --Chuck > I’ve written RX50’s to generic PC SSDD disks using a DOS window in 98SE. As long as you’re

Re: Installing an operating system on the 11/83 - update.

2022-02-22 Thread Joshua Rice via cctalk
I have a generic 5.25” (not sure of brand) in my dell GX1 but it writes plain SSDD floppies in RX50 format no problem. The RX33 was a pretty standard PC floppy drive AFAIK, just configured (with jumpers) to work as an RX33. You may find better milage configuring it as a PC floppy drive, as

Re: Origin of "partition" in storage devices

2022-02-01 Thread Joshua Rice via cctalk
This reminds me of the swapping/paging area in Windows 95/98 (maybe other versions too), which was kept in a file, and therefore might be scattered all over the physical disk. (Norton disk optimizer would coalesce the swap/paging area to a contiguous area of the disk.) Noel

Re: Memory Tech you don't see very often

2022-01-06 Thread Joshua Rice via cctalk
Not cost effective at nearly $10,000! I understand they're very rare, given they were only used for a few years in industry and they're clocking on 3/4 of a century old, but even then, that seems an order of magnitude or two off the real value. Actually, looking them up, doesn't seem they

Re: Cheap PDP-8 boards on eBait

2021-12-13 Thread Joshua Rice via cctalk
Looks like the seller has also listed a Lisa CPU board. I imagine that will be of interest to many here

RE: Looking for someone in London (UK) to read 2 9 track tapes

2021-12-01 Thread Joshua Rice via cctalk
The Centre for Computing History in Cambridge might be able to help too. -- Original Message -- From: "Dave Wade G4UGM via cctalk" To: "'Chuck Guzis'" ; "'General Discussion: On-Topic and Off-Topic Posts'" Sent: Wednesday, 1 Dec, 2021 At 09:42 Subject: RE: Looking for someone in

Re: Looking for info on memory

2021-10-21 Thread Joshua Rice via cctalk
-- Original Message -- From: "Nigel Johnson Ham via cctech" To: "Jerry Weiss via cctech" Sent: Thursday, 21 Oct, 2021 At 01:10 Subject: Re: Looking for info on memory Thanks for that, but unfortunately it is crashing into ODT and not accepting input from the console, which I

Re: Computhink Eagle 32 - software, docs, info?

2021-10-17 Thread Joshua Rice via cctalk
> On Oct 17, 2021, at 4:33 PM, Jules Richardson via cctalk > wrote: > > > Hey all, > > Someone in one of the Facebook vintage groups that I'm in just picked up a > Computhink Eagle 32, an early-ish (appears to be circa 1981/82) 68000-based > machine with integral display and keyboard. I

Re: ISO M100, M102, M633 flip chips for DEC TC08N controller

2021-10-01 Thread Joshua Rice via cctalk
-- Original Message -- From: "Josh Dersch via cctech" To: "General Discussion: On-Topic and Off-Topic Posts" Sent: Friday, 1 Oct, 2021 At 08:33 Subject: ISO M100, M102, M633 flip chips for DEC TC08N controller Hey all -- I have a TC08 DECtape controller that I'd like to convert to

Re: PDP-11/05 Fault?

2021-09-30 Thread Joshua Rice via cctalk
-- Original Message -- From: "Jerry Weiss via cctalk" To: "Paul Koning" ; "General Discussion: On-Topic and Off-Topic Posts" ; "Nigel Williams" Sent: Thursday, 30 Sep, 2021 At 15:08 Subject: Re: PDP-11/05 Fault? On 9/30/21 8:12 AM, Paul Koning via cctalk wrote: On Sep 30, 2021, at

Re: An American perspective on the late great Sir Clive Sinclair, from Fast Company

2021-09-28 Thread Joshua Rice via cctalk
Commodore in the USA/CANADA was often pressed into service for a cheap text video overlay for broadcast TV. Was that TV overlay ever used in the UK or Europe? Ben. In the UK, Acorn gear was used quite a bit for overlays and computer generated graphics. I think the Amiga was used to a

Re: Linux and the 'clssic' computing world

2021-09-27 Thread Joshua Rice via cctalk
Claiming one OS is better than another is always a contentious issue, and i'd rather prefer that this mailing list didn't fall for the same petty bickering that can be found across the internet. The fact of the matter is, when it comes to emulation on x86 IBM PC compatibles, both Windows

VT101 parts available, found on Reddit

2021-07-20 Thread Joshua Rice via cctalk
Someone on Reddit has found much of a VT101 and would like to rehome it. Not sure where he's located, but somewhere in US Thread is here: https://www.reddit.com/r/vintagecomputing/comments/ogy6im/so_i_found_a_vt101/

Re: DEC PDP-8/e H212 core mat repair

2021-07-19 Thread Joshua Rice via cctalk
-- Original Message -- From: "Tom Hunter via cctalk" To: "General Discussion: On-Topic and Off-Topic Posts" Sent: Monday, 19 Jul, 2021 At 06:33 Subject: DEC PDP-8/e H212 core mat repair I am curious if anyone has attempted to repair (replace) a broken wire in a PDP-8/e H212

Re: DEC PDP-8/e H212 core mat repair

2021-07-19 Thread Joshua Rice via cctalk
-- Original Message -- From: "Tom Hunter via cctalk" To: "General Discussion: On-Topic and Off-Topic Posts" Sent: Monday, 19 Jul, 2021 At 06:33 Subject: DEC PDP-8/e H212 core mat repair I am curious if anyone has attempted to repair (replace) a broken wire in a PDP-8/e H212

Re: MOPPY.....

2021-05-13 Thread Joshua Rice via cctalk
You missed my favorite... https://www.youtube.com/watch?v=GNTtR6ZpUOo At Doom's Gate (Doom soundtrack) Cheers Josh Rice

Re: QBUS/UNIBUS card handles

2021-05-10 Thread Joshua Rice via cctalk
On May 10, 2021, at 8:48 AM, Tom Hunter via cctalk wrote: Just don't expect it to be as tough as the original. I would assume it would be trivial to do an injection-moulded run of these handles, if 3D print schematics are available. They were definitely well-copied in the hey-day of

Re: DEC LK201-AA removable feet dimensions?

2021-04-25 Thread Joshua Rice via cctalk
If it’s of any assistance, i have one too. I see you have measurements, but here’s some photo’s which may also help https://imgur.com/gallery/jWIR3F2 Cheers, Josh Rice > On Apr 25, 2021, at 1:39 AM, Seth Morabito via cctalk > wrote: > > On Mon, Apr 19, 2021, at 6:19 PM, Rick Murphy via

Re: FTAG: AlphaServer DS15, Sun T5140, Sun Blade 10, HP Proliant DL380 G7, VT220 [London, UK]

2021-04-22 Thread Joshua Rice via cctalk
I'd be more than willing to take the VT220 and bits, but it would be public transport for me, unless you fancy a day trip to the Dorset seaside. I've been looking for one of these reasonably priced for a while to go with my MicroPDP-11's Otherwise i might be able to persuade my other half

Re: PDP 11/23 for sale on Ebay

2021-04-22 Thread Joshua Rice via cctalk
-- Original Message -- From: "Jeffrey S. Worley via cctalk" To: cctalk@classiccmp.org Sent: Wednesday, 21 Apr, 2021 At 16:18 Subject: PDP 11/23 for sale on Ebay There's a nice, working PDP 11/23 with 20 meg hdd and 1meg (!!) of ram, 1MB RAM isn't exactly huge for a MicroPDP-11,

Re: Wagner WAC40

2021-03-13 Thread Joshua Rice via cctalk
> Very interesting looking. I can't quite make out what is going on in that > rectangular area where all the wires terminate, labeled 0-15 and A-R. Are > there diodes there? Anything on the other side of that board? Nothing but traces on the other side, though you’re right on them being

Re: Looking for gnupro for BeBox BeOs PowerPC

2021-03-13 Thread Joshua Rice via cctalk
It may be worth contacting the Haiku OS project. They have quite a few old BeOS devs working on the project, i’m sure someone would know where to find a copy. Josh

Wagner WAC40

2021-03-13 Thread Joshua Rice via cctalk
Hi, I recently bought a core rope memory unit from a Wagner WAC40, mainly because it’s very aesthetically pleasing and looks good on display: https://i.redd.it/h9sb550uhnm61.jpg However, i can fine very little about Wagner Computer, the WAC40 (and WAC12), or the man behind the company,

Re: Sovier/Russian 132-pin PGA Ceramic IC Packaging

2021-02-09 Thread Joshua Rice via cctalk
Though i’m no expert, it looks like those are more an artefact of production, rather than usable test points. It seems like those pins extend throughout the ceramic substrate, and were most likely produced by pushing the pins through holes in the substrate and then soldering them. This may have

Re: Dec RQDX: What kind of chips on it?

2021-01-05 Thread Joshua Rice via cctalk
Sorry for the spam! Here’s some high-resolution pics i took of the 2 and 3 for your viewing pleasure: https://imgur.com/gallery/VJPW5YV

Re: Dec RQDX: What kind of chips on it?

2021-01-05 Thread Joshua Rice via cctalk
These links may help: http://decvax.50megs.com/doc/rqdx/rqdx.html http://www.vcfed.org/forum/archive/index.php/t-47834.html http://web.frainresearch.org:8080/projects/pdp-11/diskcntl.php

Re: Dec RQDX: What kind of chips on it?

2021-01-05 Thread Joshua Rice via cctalk
I’m not sure where i read it, but i’m pretty sure the main “brains” of the RQDX2 is a T-11 (PDP-11 FALCON) chip, and that does the negotiations between disk and system. I don’t know if it’s the same for the RQDX3, but i’d suspect not, as the incompatabilities between the 2 and 3 are probably

RE: LCD screen repair

2020-11-23 Thread Joshua Rice via cctalk
You'll have a better idea than me, but it looked like the underlying glass in the LCD panel was cracked, though that might have been dust smudges. If it's just the overlying plastic coating that's scuffed, it's possible to replace it, but quite tricky. I'm not overly familiar with the panel

Re: PDP-11 based Data Translation system on ebay

2020-08-15 Thread Joshua Rice via cctalk
> On Aug 15, 2020, at 6:21 PM, Zane Healy via cctalk > wrote: > > On Aug 15, 2020, at 9:47 AM, Douglas Taylor via cctalk > wrote: >> >> Many of you have seen this on ebay already: item 224117176901 >> >> I'm on the east coast so it is out of my reach. >> >> It appears to be a complete

Re: : Unknown Intel blinkenlight panel circa 1973

2020-06-19 Thread Joshua Rice via cctalk
> On Jun 19, 2020, at 3:07 PM, Noel Chiappa via cctalk > wrote: > > BTW, speaking of Intel PDP-11 memory, I have this: > >http://gunkies.org/wiki/File:IN-1611.jpg > > QBUS Intel memory board; hven't tried to get it running, though. > > Noel > I have a similar M8044 DD PDP-11

Re: IBM vacuum tubes

2020-06-15 Thread Joshua Rice via cctalk
Hard to say, without the modules they came from. As far as my (limited) understanding of vacuum tube logic goes, double triodes were very common for implementing basic boolean logic functions. Therefore, most IBM vacuum tube computers and data processing machines would have hundreds/thousands

Re: : Unknown Intel blinkenlight panel circa 1973

2020-06-15 Thread Joshua Rice via cctalk
Somehow it seems the thread got fragmented. I posted it to the other half of this thread. Here’s a link to a high-quality picture of the front panel, straight from the listing. Turns out i’m crap at taking steady photos https://i.ebayimg.com/images/g/dysAAOSwqqJehZ-Y/s-l1600.jpg

Re: Unknown Intel blinkenlight panel circa 1973

2020-06-15 Thread Joshua Rice via cctalk
PDP-10 was 36-bit. You’re thinking of the PDP-1, 4, 7, 9 and 15 line of computers. However, it’s not actually 18-bit, but 2 8-bit bytes with parity for each byte. If it is indeed an early Intel memory addon for minicomputers, i’d expect it to be for the 16-bit DG Nova or PDP-11 line of

Re: Unknown Intel blinkenlight panel circa 1973

2020-06-14 Thread Joshua Rice via cctalk
https://i.ebayimg.com/images/g/dysAAOSwqqJehZ-Y/s-l1600.jpg That’s off the listing. Sorry the photos came out funny/upside down, i guess my phone couldn’t work out which way up it was… I think the photos of the board numbers are

Unknown Intel blinkenlight panel circa 1973

2020-06-14 Thread Joshua Rice via cctalk
Hi all. I recently bought a mystery blinkenlight panel. Closer inspection reveals it was manufactured by Intel in the early 70’s (1973), and some people on the book of faces suggested it was part of a “device multiplexer”(?) I’m 95% confident it’s not strictly a “computer” blinkenlight panel,

Re: Apple 1

2020-06-14 Thread Joshua Rice via cctalk
“Here i am, brain the size of a planet, and i’m controlling a robot that does tape backups” > On Jun 14, 2020, at 6:28 AM, Al Kossow via cctalk > wrote: > > On 6/13/20 10:20 PM, jim stephens via cctalk wrote: >> Do they still have it? > > The Y-MP was replaced by a cray-ette in the early 90s

Re: Thinking of selling my PDP's

2020-06-14 Thread Joshua Rice via cctalk
There’s ALWAYS a market for PDP-8’s and PDP-11’s. Sadly though, i assume these are all on the yankee side of the pond, ruling out the significant european market out entirely (and don’t even THINK about shipping, unless you want to remortgage your house) Either way, i’m sure you won’t

Re: Core Memory Photo

2020-04-15 Thread Joshua Rice via cctalk
Was beautiful. That’s pretty mangled now. > On Apr 14, 2020, at 5:53 PM, Fred Cisin via cctalk > wrote: > > On Mon, 13 Apr 2020, keith--- via cctalk wrote: >> "Ouch. Looks like that core took a serious hit." Yep it did. We ran the >> microscope into it at the lab. Ouch. Someone had >> asked

Re: pdp11/05 key?

2020-04-08 Thread Joshua Rice via cctalk
Late to the party, but there’s PDP11 keys sold on ebay here: https://www.ebay.co.uk/itm/DEC-PDP-8-PDP-11-Computer-Key-XX2247-Digital-PDP-8E-8I-8L-8S/333296145346?epid=2164686531=item4d99ff93c2:g:nWcAAOSwZtlZ7TIB

Re: H7821 power supply in MicroVAX 3100, SCSI disk enclosures and others

2020-01-31 Thread Joshua Rice via cctalk
The main failure point of all old electronics are the capacitors. Over time, electrolytic capacitors dry out, and can cause a wide array of different faults. From ones that are leaky, and or way out of spec, they can exhibit all sorts of “fun” errors in hardware. The main one i’ve come across

Re: Update: Shipping 50 lb computer from Zell am See, Austria to CA.

2019-08-23 Thread Joshua Rice via cctalk
I’ve had/am having a similar sized machine shipped from Bulgaria to the UK, twice. Board first, chassis second. It cost me roughly £60 all in. I expect a machine taking that long a journey would be best done by ocean frieght. It’ll take longer than air mail, but a transatlantic flight with a

Re: Test

2019-08-11 Thread Joshua Rice via cctalk
> On Aug 11, 2019, at 3:25 PM, Alexandre Souza via cctalk > wrote: > > Test error. Please call helpdesk. 555-1212 Have you tried turning it off and on again?

Re: 11/93 Rebuild

2019-05-27 Thread Joshua Rice via cctalk
Same command will work from a linux live cd > On May 27, 2019, at 9:30 AM, Rod Smallwood via cctalk > wrote: > > Hi > > On an old XP box? er neither will run > > Rod > > > On 27/05/2019 08:25, Christian Corti via cctalk wrote: >> # dd if=RD54.dsk of=/dev/sda [or whatever the device