Search found 123 matches

by MMcM
19 Oct 2020, 04:27
Forum: Workshop
Topic: Tektronix 4120
Replies: 1
Views: 90

Tektronix 4120

This keyboard is from a Tektronix 4120 series graphic workstation from 1985. tek-case.jpg To quote the catalog : The 4120's user-friendly keyboard features numeric keypads, thumbwheels for graphic input, eight dedicated programmable function keys, ports for joystick and mouse, and a complete easy-to...
by MMcM
04 Oct 2020, 04:27
Forum: Workshop
Topic: How do I figure out a Keyboards Scan Codes?
Replies: 10
Views: 390

Re: How do I figure out a Keyboards Scan Codes?

you will always have a VCC pin, a GND pin and at least one data pin Even that isn't universally true. It's possible to share Vcc and data. I recently converted external numpads that work by: Having the terminal disconnect power periodically and running off capacitors to actually do the data xfer. P...
by MMcM
04 Oct 2020, 04:05
Forum: Workshop
Topic: Alps / Genovation KPX-17
Replies: 0
Views: 188

Alps / Genovation KPX-17

Following on the recent conversion of some external numpads built by Mitsumi for Toshiba and Compaq that minimized space by only having a mono sub-mini audio jack, I dug around in the work pile for other interesting approaches from around the same time, the early '90s. One such is to use connectors ...
by MMcM
27 Sep 2020, 17:29
Forum: Other external
Topic: Great/Interesting Finds
Replies: 23983
Views: 1957186

Re: Great/Interesting Finds

Some of what Chyrosran in a recent review calls Micro Switch microswitch switches:

https://www.ebay.com/itm/224171925218

He believes them to be the tallest keyboard switches around.
by MMcM
26 Sep 2020, 23:59
Forum: Workshop
Topic: Keypad from early laptop with TR plug
Replies: 1
Views: 166

Re: Keypad from early laptop with TR plug

As planned, I got one of those Compaq external keypads, the 2697. I believe this is from the mid-'90s. Compaq-back.jpg It adds a scaled-down navpad. Compaq-case.jpg The switches are Mitsumi rubber dome over membrane and the PCB is indeed made by them as well. Compaq-top.jpg The design is rather more...
by MMcM
24 Sep 2020, 16:26
Forum: Other external
Topic: Great/Interesting Finds
Replies: 23983
Views: 1957186

Re: Great/Interesting Finds

Rayndalf wrote:
24 Sep 2020, 02:37
https://www.ebay.com/itm/Cardkey-Numeri ... 3750592889

It's cute. Any idea what kind of switches these are?
Stackpole. See here.
by MMcM
21 Sep 2020, 15:27
Forum: Workshop
Topic: Vintage Compaq Portable III Keycap Repair :-/
Replies: 7
Views: 300

Re: Vintage Compaq Portable III Keycap Repair :-/

Baking soda is not just providing structure. Cyanoacrylates are self-polymerizing. Crazy glue adds sulfonic acid, which inhibits that. The acid reacts with moisture in the air to (relatively) slowly break down and so cure the adhesive. Baking soda neutralizes the acid almost immediately, so the same...
by MMcM
20 Sep 2020, 22:03
Forum: Workshop
Topic: Keypad from early laptop with TR plug
Replies: 1
Views: 166

Keypad from early laptop with TR plug

This is an external keypad for a Toshiba T1000/T1200 8086 laptop. toshiba-case.jpg It is model PA7354E and from around 1987. toshiba-back.jpg It has Mitsumi switches, so it's okay for the time, but nothing special. What is unusual is how it connected to the motherboard. It has a 2.5mm mono sub-mini ...
by MMcM
18 Sep 2020, 00:10
Forum: Other external
Topic: Great/Interesting Finds
Replies: 23983
Views: 1957186

Re: Great/Interesting Finds

"I just didn't want to run the risk of undervaluing it."

https://www.ebay.com/itm/293739673034
by MMcM
15 Sep 2020, 18:03
Forum: Other external
Topic: Great/Interesting Finds
Replies: 23983
Views: 1957186

Re: Great/Interesting Finds

by MMcM
08 Sep 2020, 01:35
Forum: Workshop
Topic: CTM / Cherry 601-1518
Replies: 0
Views: 238

CTM / Cherry 601-1518

This keyboard is from some CTM system in 1988. Its part number seems to be 680-1114HAC/03. CTM-case.jpg I am not familiar enough with CTM product lines to say what it was part of and didn't find a comprehensive source online. It says Series #32, A26. CTM-back.jpg The design is rather striking with l...
by MMcM
31 Aug 2020, 02:25
Forum: Workshop
Topic: HDS Concept AVT-APL+
Replies: 0
Views: 172

HDS Concept AVT-APL+

Really the only reason I bothered with this keyboard is the APL keycaps. HDS-case.jpg It's from a Human Design Systems Concept AVT-APL+ terminal. The badge has gone missing and the caps have yellowed, but it's a recognizable match with the brochure. A terminal with full APL overstrike at the beginni...
by MMcM
29 Aug 2020, 20:33
Forum: Keyboards
Topic: Help me connect this AMPEX 230 plus with a modular connector to a PC
Replies: 10
Views: 1432

Re: Help me connect this AMPEX 230 plus with a modular connector to a PC

I now believe that the Ampex 2xx terminals all used a similar non-standard bit-serial protocol.

See here for conversion of a 219.
by MMcM
29 Aug 2020, 20:29
Forum: Workshop
Topic: Ampex 219
Replies: 0
Views: 191

Ampex 219

This is a keyboard from an Ampex 219 terminal from the mid '80s. Ampex-219-case.jpg Ampex-219-back.jpg The key layout is almost identical to the Ampex 230, discussed here before and photographed in the wiki and on Bitsavers . So much so that you could almost believe that one of them has had the keys...
by MMcM
10 Aug 2020, 05:36
Forum: Workshop
Topic: Cortron (ITW) 55-500216
Replies: 3
Views: 362

Cortron (ITW) 55-500216

This Cortron keyboard was part of a CPT 8000 series word processor from the end of 1979. CPT-case-black.jpg It is more than 2 ft. long. The case is steel, so the whole weighs 9.5 lbs. It has full-height magnetic valve switches. The key caps were pretty dirty, but the switches themselves are still qu...
by MMcM
10 Aug 2020, 05:22
Forum: Workshop
Topic: Need help on a Tandy TRS-80 USB conversion
Replies: 14
Views: 1945

Re: Need help on a Tandy TRS-80 USB conversion

I have a Tandy 1000 keyboard and I'd like to make it work with a Teensy. Note that the converter mentioned upthread does now mostly work externally without any change to the keyboard at all. And, except for the lock keys which need to be handled specially, it is fairly generally remappable. So, if ...
by MMcM
02 Aug 2020, 19:54
Forum: Workshop
Topic: Amkey SNK-58
Replies: 0
Views: 270

Amkey SNK-58

An Amkey SNK-58 keyboard. Amkey-top.jpg There were a number of sales like this on eBay earlier this year. I am not clear whether the seller had several of them or the one sale kept falling through after closing. Anyway, we got this one. It appears to have been part of some kind of T-Bar brand serial...
by MMcM
01 Aug 2020, 22:46
Forum: Workshop
Topic: Standard IIe Tender Keypad
Replies: 0
Views: 260

Standard IIe Tender Keypad

This is the Track House Standard IIe Tender Keypad for the Apple IIe. Standard-IIe-Tender.jpg The ink has worn off, but the company name is embossed on the rubber insert in the upper-left and almost visible in the photo, as well as printed on the back label. Standard-IIe-Tender-label.jpg I has some ...
by MMcM
27 Jul 2020, 01:26
Forum: Workshop
Topic: Atari keypads
Replies: 0
Views: 716

Atari keypads

I am not one for games, so I do not pay much attention to vintage controllers or gaming features on modern keyboards. But when I came upon this Atari CX85, it looked a bit more like an actual external keypad and I remembered something about them entering into a joint venture to make the key switches...
by MMcM
21 Jul 2020, 21:58
Forum: Other external
Topic: Great/Interesting Finds
Replies: 23983
Views: 1957186

Re: Great/Interesting Finds

DIY cable for DIY wiring:

https://www.ebay.com/itm/313154976511
by MMcM
19 Jul 2020, 17:18
Forum: Workshop
Topic: NEC APC-H25
Replies: 0
Views: 1281

NEC APC-H25

This is a keyboard from an NEC APC. NEC-APC-top.jpg The keyboard has yellowed in an inconsistent way, I suppose because of how it was stored before I came upon it. It differs from the one in the wiki in not having stepped key caps for the extra-wide keys. It is dated 56年7月, that is, July 1982, so I ...
by MMcM
11 Jul 2020, 23:29
Forum: Workshop
Topic: Beehive B100
Replies: 0
Views: 1334

Beehive B100

This is the keyboard from inside a Beehive B100 terminal. Beehive-top.jpg The wiki has photos by snuci, who has a complete terminal. The chips in this one all have 76 date codes and that has a couple 77 and so is perhaps a little younger. The custom controller IC and socketed ROM aren't quite the sa...
by MMcM
08 Jul 2020, 03:23
Forum: Other external
Topic: Great/Interesting Finds
Replies: 23983
Views: 1957186

Re: Great/Interesting Finds

Boxes reminds me of this, which has been up for some time now:

https://www.ebay.com/itm/163503556563

It looks to me like someone took the APL keycaps, put them on their keyboard and put the non-APL ones back into the box.
by MMcM
06 Jul 2020, 21:03
Forum: Keyboards
Topic: CADAM Function Keyboard
Replies: 5
Views: 503

Re: CADAM Function Keyboard

What's inside the right-hand box? It's awfully big to just be a null modem, which is all it seems like would be there conceptually. Among other things, which of the DTE signals from the computer are actually wired up in there? That might tell whether DTR matters. I think a reasonable working assumpt...
by MMcM
05 Jul 2020, 16:58
Forum: Workshop
Topic: QWERTZ laptop(?) matrix with Omron B3G-S amber
Replies: 0
Views: 1413

QWERTZ laptop(?) matrix with Omron B3G-S amber

Writing of design choices for integrated keyboards reminded me that I have this board that I got as part of a package deal from tentator. So I dug it out from the bottom of the pile and hooked it up. Omron-top.jpg The compact layout -- aside from the giant ISO Enter -- suggests a laptop and the Turb...
by MMcM
04 Jul 2020, 18:37
Forum: Workshop
Topic: DEC VT50
Replies: 0
Views: 1370

DEC VT50

I got this 1976 board even though it has an obvious problem. VT50-top.jpg Now I'm on the lookout for a Hi-Tek E key or else having to use un corps noir tranchant un flamant as a typing test phrase. Other than that, it cleaned up nicely: only a few scratches and a couple switches with broken corners,...
by MMcM
04 Jul 2020, 16:33
Forum: Workshop
Topic: Pericom keyboard
Replies: 4
Views: 1835

Re: Pericom keyboard

Do you have an opinion on the switches themselves? I think I like something with a little more travel. I've got an older ITW in the quarantine queue (that's 75% heavier) that I may end up liking more. The ones on this board also feel a little scratchy. I don't know whether that's because they need ...
by MMcM
04 Jul 2020, 16:26
Forum: Other external
Topic: Great/Interesting Finds
Replies: 23983
Views: 1957186

Re: Great/Interesting Finds

Sanyo MBC-885 with FLS 3rd gen switches:

https://www.ebay.com/itm/303613783321

This is around when everyone was standardizing on IBM compatibility, so maybe it's XT protocol, unlike the earlier 550, which was just serial ASCII.
by MMcM
03 Jul 2020, 03:02
Forum: Other external
Topic: Great/Interesting Finds
Replies: 23983
Views: 1957186

Re: Great/Interesting Finds

hellothere wrote:
03 Jul 2020, 01:45
That could be cool. I've not played with a Space Invaders keyboard before.
I got one a while ago (see here). It's a fun little board.
by MMcM
01 Jul 2020, 04:49
Forum: Other external
Topic: Great/Interesting Finds
Replies: 23983
Views: 1957186

Re: Great/Interesting Finds

Some SD-series keyboards

Video Typewriter (with 4A3B)

https://www.ebay.com/itm/203035303082

Honeywell terminal stateside (with 4B3E)

https://www.ebay.com/itm//283932456518

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