Ruined 1993 ThinkPad Tablet Brought Back From The Brink

November 18, 2024 by Lewin Day 10 Comments

Collecting retrocomputers is fun, especially when you find fully-functional examples that you can plug in, switch on, and start playing with. Meanwhile, others prefer to find the damaged examples and nurse them back to health. [polymatt] can count himself in that category, as evidenced by his heroic rescue of an 1993 IBM ThinkPad Tablet.

The tablet came to [polymatt] in truly awful condition. Having been dropped at least once, the LCD screen was cracked, the case battered, and all the plastics were very much the worse for wear. Many of us would consider it too far gone, especially considering that replacement parts for such an item are virtually unobtainable. And yet, [polymatt] took on the challenge nonetheless.

Despite its condition, there were some signs of life in the machine. The pen-based touch display seemed to respond to the pen itself, and the backlight sort of worked, too. Still, with the LCD so badly damaged, it had to be replaced. Boggling the mind, [polymatt] was actually able to find a 9.4″ dual-scan monochrome LCD that was close enough to sort-of fit, size-wise. To make it work, though, it needed a completely custom mount to fit with the original case and electromagnetic digitizes sheet. From there, there was plenty more to do—recapping, recabling, fixing the batteries, and repairing the enclosure including a fresh set of nice decals.

The fact is, 1993 IBM ThinkPad Tablets just don’t come along every day. These rare specimens are absolutely worth this sort of heroic restoration effort if you do happen to score one on the retro market. Video after the break.

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Strange English Teaching Computer Might Have Been Big In Japan

October 21, 2024 by Al Williams 9 Comments

[Ctrl-Alt-Rees] bought something strange on an auction site: a Japanese Cefucom-21 from 1983. No? Didn’t ring a bell for us either. The legend on the front boldly proclaims: “CCI Multipurpose SLAP Computer,” so maybe it is some kind of computer, but it is definitely strange. For one thing, the “screen” isn’t a screen at all. [Rees] has found that it has something to do with teaching English. You can see the odd beast in the video below.

We don’t know how common these were in Japan, but they appear to be virtually unknown everywhere else. Inside is a Z80 computer based on a Sanyo PHC-25, which is a little better known.

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Building A ZX Spectrum Using Only New Parts

October 17, 2024 by Lewin Day 29 Comments

Ah, the Sinclair ZX Spectrum. A popular computer in Britain and beyond, but now rather thin on the ground. If you can’t find one, fear not, for now—you can apparently build a new one with new parts! [TME Retro] is here to demonstrate how.

Before you get excited, no—Sinclair has not risen from the dead. Instead, it’s simply down to the state of the retrocomputing community. There are enough reproduction parts and components out there for the ZX Spectrum that it’s now possible to assemble the whole computer from new bits. You can get new cases and new mechanical keyboards, and a 100% compatible motherboard in the form of the Harlequin board. The latter even reproduces the unobtainable Spectrum ULA glue logic chip in raw logic!

It’s neat to see the ZX Spectrum live on decades after the production lines ground to a halt. We’ve seen similar feats achieved with the legendary Commodore 64; you’d think we had enough of them given they were the best-selling computer of all time. Video after the break.

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This Vintage Computing Device Is No Baby Food

July 20, 2024 by Al Williams 9 Comments

Today, if you want a computer for a particular task, you go shopping. But in the early days of computing, exotic applications needed custom computers. What’s more is that with the expense of computers, you likely got one made that fit exactly what you needed and no more. That led to many oddball one-off or nearly one-off computers during that time frame. Same for peripheral devices — you built what you had to and you left the rest on the drafting table. [Vintage Geek] got his hands on what appears to be one of them: the Gerber Scientific 6200.

While Gerber Scientific is still around, we’ve never heard of the 6200. Based on the serial number, we would guess at least 62 of them were made and this one has an interesting backstory of living in someone’s home who worked at the Pentagon. We presume the tapes were erased before it was sold!

Design-wise, it is pretty standard stuff. A 19-inch rack, a standard tape drive from Kennedy, a power supply, and some cards. The box takes 240 V, so the computer didn’t get powered up, but an examination of the inside looked like this really was a one-off with handwritten labels on masking tape.

We couldn’t tell for sure if the device was a computer itself, or just a tape drive and maybe plotter interface for another computer. If you know anything about this device, we are sure [Vintage Geek] would like to hear from you.

If this does turn out to have a CPU onboard, we’d bet it is bit sliced. If you have a 9-track tape machine, you may have to make your own tapes soon.

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One Man’s Trash Is… A Rare $60,000 Historical Computer

May 25, 2024 by Al Williams 10 Comments

According to Smithsonian Magazine, a salvage company in London was cleaning out a property and found an odd-looking computer device. No one knew what it was, and they couldn’t find anything with a quick online search. The devices in question were two ultra-rare Q1 computers dating from the early 1970s.

While these machines looked formidable, they contained Intel 8008 CPUs but did have built-in screens, keyboards, and printers. The two machines had a few minutes of fame at Kingston University London and are now for sale. They will probably bring about $60,000 each. Not bad for salvage junk.

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A bald white man stands behind a table with an Apple II, a large green PCB, and a modular purple and black development board system. Atop the Apple II is what appears to be a smaller Apple II complete with beige case and brown fake keyboard.

Mini Apple IIe Now Fully Functional

December 5, 2023 by Navarre Bartz 1 Comment

Here at Hackaday, we love living in a future with miniaturized versions of our favorite retrocomputers. [James Lewis] has given us another with his fully functional Apple IIe from the Mega II chip.

When we last checked in on the Mega IIe, it was only just booting and had a ways to go before being a fully functional Apple II. We really love the modular dev board he designed to do the extensive debugging required to make this whole thing work. Each of the boards is connected with jumper pins, which [Lewis] admits would have been better as edge connectors since he should’ve known he’d be unplugging and replugging them more than he’d like.

This modular prototyping system paid dividends late in the project when a “MEGA bug” threatened the stability of the entire system. Since it was confined to the keyboard PCB, [Lewis] was able to correct the error and, swapping for the third revision of the board, everything that had been crashing the system now ran.

There were still some issues going to the final unified PCB that nearly made him give up on the project, but perseverance paid off in the end. Combining vintage chips and multiple RP2040s isn’t for the feint of heart.

Now that you have a more conveniently-sized Apple II, why not teach it some new tricks like digital photography or ChatGPT?

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The Golden Age Of Gadget Catalogs

November 8, 2023 by Jenny List 22 Comments

Among Hackaday’s readership are likely to be many gadget enthusiasts who live for the latest electronics and who have obsessively followed gadget trends for most of their lives. You possess elite AliExpress-fu, and like the hipsters, you were into everything long before it was cool. It’s safe to say the Internet has revolutionized the world of the gadget freak, but in a time before even dial-up access there was another way into this most technophilic of pastimes. As soon as there was consumer electronics there were mail-order catalog companies slaking the thirst of the gadget-crazy, and [Cabel Sasser] is here with a look at both their heyday and their swansong.

A full page advert for a "Corporate cockpit" all-in-one wordprocessor computer. — Drew, just shut up and take my money!

He has a particular focus on the catalog produced during the 1980s by DAK Industries Inc, a North Hollywood California based company that was the work of an entrepreneur named Drew Kaplan. He presented a glittering array of the latest and greatest tech of the era, and packaged it with riveting descriptions and beautifully-shot glossy photographs. [Cabel] was hooked, and we would certainly have been too. There were digital watches with outrageous functionality, portable briefcase computers, novelty telephones, Hi-Fi components at knock-down prices, and plenty of cassette tapes to play in them.

Their signature was an engaging copy-writing style that really made you want the product, and here we enter an interesting story in itself. There was another mail order gadget company in the 1970s which used exactly the same formula but running full-page adverts, similar enough to be obviously connected in some way. Had DAK stolen the idea? Not quite, for these were the product of a man called Joseph Sugarman, who also ran a “Learn my formula for sales success” course. Drew Kaplan didn’t hesitate to attribute his success to the Sugarman course, leaving us with the surprising conclusion that there’s more to the “Learn my formula” business than simply making money from marks prepared to pay for the course.

Here at Hackaday we occasionally venture into purple prose for fun, but we’re not trying to sell you any consumer electronics. We can’t help a professional admiration for the copy-writing in these catalogs though, and since they’re all available for download from Internet Archive we’re going to spend a while wallowing in tech nostalgia. It’s a place we’ve been to before.