Search found 275 matches

by MMcM
12 Jul 2021, 06:42
Forum: Workshop
Topic: APL Keyboard for APL
Replies: 0
Views: 178

APL Keyboard for APL

One of the keyboards that has been waiting for conversion is this from a TI Silent 700 Model 743 (or more likely 745 -- the difference is an acoustic coupler and I think they sold better with), including the APL option: 63SD17-3-case.jpg It has Micro Switch SD series switches. 63SD17-3-top.jpg Most ...
by MMcM
05 Jul 2021, 05:17
Forum: Workshop
Topic: IR PC keyboards: IBM and Quadram
Replies: 3
Views: 297

Re: IR PC keyboards: IBM and Quadram

For comparison, here is the wired protocol from a PCjr's RJ port. The encoding is the same, with 0 and 1 half-bits being distinguished straightforwardly as low and high (rather than 1 containing an IR pulse). PCjr-RJ-A-logic.png The same converter firmware can handle both encodings with separate GPI...
by MMcM
28 Jun 2021, 22:50
Forum: Other external
Topic: Great/Interesting Finds
Replies: 25286
Views: 2831409

Re: Great/Interesting Finds

Mac music scoring keypad

https://www.ebay.com/itm/124706901862

The FCC id says Pitch Pad, but I believe this was sold as the Presto pad, as described here.
by MMcM
28 Jun 2021, 06:17
Forum: Workshop
Topic: IR PC keyboards: IBM and Quadram
Replies: 3
Views: 297

IR PC keyboards: IBM and Quadram

For a short period in the early-80's, some home PCs had infrared wireless keyboards, to try to make them more flexible in non-office setups, I guess. The best known of these is the notorious IBM PCjr, with keyboards made by Advanced Input Devices, first with chiclet keys and then with more normal, s...
by MMcM
26 Jun 2021, 02:25
Forum: Keyboards
Topic: Locked out of my IBM PC XT keyboard
Replies: 11
Views: 577

Re: Locked out of my IBM PC XT keyboard

Zobeid Zuma wrote:
25 Jun 2021, 22:20
Is “sctools-master/hidapi” supposed to be an empty folder?
I believe that hidapi is a submodule. Did you do this?

Code: Select all

git clone --recurse-submodules
If not, you'll need to submodule init and update them after the fact in the working directory.
by MMcM
25 Jun 2021, 16:49
Forum: Keyboards
Topic: Locked out of my IBM PC XT keyboard
Replies: 11
Views: 577

Re: Locked out of my IBM PC XT keyboard

What does the keyboard say when it enumerates to the OS? That might remind you want firmware you put on it.

Did you confirm that it isn't just running Soarer's by trying sctool boot?
by MMcM
21 Jun 2021, 03:58
Forum: Workshop
Topic: Some serial ASCII keyboards
Replies: 8
Views: 1224

Re: Some serial ASCII keyboards

A Sony KI-105NE. Sony-KI-105NE-case.jpg Sony-KI-105NE-back.jpg A nice looking medium-sized keyboard from the mid-80s. It's hard to capture in a photo, but the eighteen F keys are pale green on gray. The telephone-style numpad is simple. I imagine the arrow placement takes some getting used to. It ha...
by MMcM
20 Jun 2021, 09:18
Forum: Workshop
Topic: Help with a RS-232 Number pad and Linux
Replies: 4
Views: 277

Re: Help with a RS-232 Number pad and Linux

GivenZane wrote:
20 Jun 2021, 06:35
it can't access my USB to Serial adapter.
Do you get the generic error (no perror, no errno display) that code returns?

Code: Select all

Unable to open tty port specified
Is the logged in user a member of the group that owns the serial port device, usually dialout?
by MMcM
20 Jun 2021, 04:10
Forum: Workshop
Topic: IBM LPFK & Arduino Nano.
Replies: 50
Views: 5132

Re: IBM LPFK & Arduino Nano.

Good call on EXTRAKEY_ENABLE. Looks like it got lost in the conversion to the expanded info.json. The stuck media keys seems to be a timing problem with how QMK tries to pretend Chibios isn't async. Since there are no up transitions, it clears the matrix on the very next scan. But if the previous re...
by MMcM
20 Jun 2021, 02:08
Forum: Other external
Topic: Great/Interesting Finds
Replies: 25286
Views: 2831409

Re: Great/Interesting Finds

Blue Alps? https://www.ebay.com/itm/324648296794 https://deskthority.net/wiki/Accodata_Keycat Both sold. Regarding possible blue Alps, if the wiki ever mentions that it's possible that there was a different key switch used in the KB you're looking at, that means the KB you're looking at (probably) ...
by MMcM
20 Jun 2021, 01:57
Forum: Other external
Topic: Great/Interesting Finds
Replies: 25286
Views: 2831409

Re: Great/Interesting Finds

6-pin DIN screams Fujitsu Leaf Springs 3rd Gen to me. It's a pretty KB. It's gone. Hope buyer could bring it here to confirm something. This KI-105NE seems to be Cream Alps. Sony-KI-105NE-broken-switch.jpg That's from a quick look at a broken switch, maybe from shipping. Getting it open to see what...
by MMcM
19 Jun 2021, 20:47
Forum: Workshop
Topic: IBM LPFK & Arduino Nano.
Replies: 50
Views: 5132

Re: IBM LPFK & Arduino Nano.

raoulduke-esq wrote:
19 Jun 2021, 20:31
Did I understand that correctly?
Yes. Give that shot.
by MMcM
19 Jun 2021, 20:14
Forum: Workshop
Topic: IBM LPFK & Arduino Nano.
Replies: 50
Views: 5132

Re: IBM LPFK & Arduino Nano.

Okay. I see what is happening. I apologize for not noticing this earlier. First off, the wires on both the DIN-8 socket and the PCB connector are the same as here and fine. Moreover, they are in EIA color code order: Brown, Red, Orange, Yellow, Green, Blue, Violet, Gray. However, the cable that I ha...
by MMcM
19 Jun 2021, 05:45
Forum: Workshop
Topic: IBM LPFK & Arduino Nano.
Replies: 50
Views: 5132

Re: IBM LPFK & Arduino Nano.

Don't assume that the pin numbers on CN1 are related to the pin numbering of the DIN standard. The pin you have circled on U2 is 14. (The dot on the lower-right is next to pin 1. Count left from there to 8, then cross over and count right.) This chip has 16 pins. Vcc is two to the right of there. Yo...
by MMcM
16 Jun 2021, 05:31
Forum: Workshop
Topic: IBM LPFK & Arduino Nano.
Replies: 50
Views: 5132

Re: IBM LPFK & Arduino Nano.

All these 74-series TTL chips have ground in the lower-left and +5 in the upper-right, so those are easy to check. This is fine make converter/ibm_lpfk:default:teensy For future reference, an equivalent that works with other kinds of MCUs that I usually use is make converter/ibm_lpfk:default:flash B...
by MMcM
16 Jun 2021, 03:59
Forum: Workshop
Topic: IBM LPFK & Arduino Nano.
Replies: 50
Views: 5132

Re: IBM LPFK & Arduino Nano.

Yes, everything looks newish. Did you try measuring power to all the chips? As I said earlier, for loopback mode all they need is 5V and the other signals don't matter. And if there were a short between 5V and ground, USB wouldn't work. Furthermore, I thought the power-on state was to light all the ...
by MMcM
14 Jun 2021, 16:24
Forum: Other external
Topic: Great/Interesting Finds
Replies: 25286
Views: 2831409

Re: Great/Interesting Finds

SW-10217 https://www.ebay.com/itm/294220195027 Thick double-shot, bright blue keycaps. Looks like the one that was pulled off for the photo maybe got nicked in the process. I wonder whether it went form QWERTY to QWERTZ by just swapping a keycap; otherwise looks USA. One of the stepped shift keys is...
by MMcM
13 Jun 2021, 15:32
Forum: Workshop
Topic: IBM LPFK & Arduino Nano.
Replies: 50
Views: 5132

Re: IBM LPFK & Arduino Nano.

Okay. In the meantime it should be possible to isolate a power fault with just a cheapo multi-meter. When not connected, does the cable have continuity for 1, 2, (row of two), and 5 (staggered one on middle row of three)? When connected only to the device, is there continuity between 1 and 2? When c...
by MMcM
13 Jun 2021, 05:33
Forum: Workshop
Topic: IBM LPFK & Arduino Nano.
Replies: 50
Views: 5132

Re: IBM LPFK & Arduino Nano.

That's disappointing. Do the LEDs on the LPFK turn on briefly when you first apply power to it? If you put it into loopback mode, do key presses "echo" via the LED underneath?
by MMcM
06 Jun 2021, 03:11
Forum: Workshop
Topic: Convergent Technologies and Negative Serial
Replies: 11
Views: 2622

Re: Convergent Technologies and Negative Serial

Sometime around 1984, Convergent changed from a 9-pin D-sub to an 8-pin SDL connector. Convergent-KM-001-side.jpg The signals are the same: +5, GND, RESET, DATA OUT, and DATA IN at 1200 baud. A new converter just needs the new connector. Convergent-converter-SDL.jpg This keyboard has the same layout...
by MMcM
04 Jun 2021, 15:56
Forum: Other external
Topic: Great/Interesting Finds
Replies: 25286
Views: 2831409

Re: Great/Interesting Finds

Only problem left to solve: Make it work with my computer. It has got an RS232 interface. ICL232CPE chip on the PCB, together with an 80C31BH-3 microcontroller and 5V markings on the board (so at least I don’t have to hassle around with 12-15V), DB9 connector and the manual of the “Motortester” say...
by MMcM
02 Jun 2021, 18:07
Forum: Other external
Topic: Great/Interesting Finds
Replies: 25286
Views: 2831409

Re: Great/Interesting Finds

No keycaps, no microcontroller, but a bunch of SD-series switches.

https://www.ebay.com/itm/234035913007

As far as I can make out, they are 4U5E.
by MMcM
02 Jun 2021, 05:42
Forum: Workshop
Topic: IBM LPFK & Arduino Nano.
Replies: 50
Views: 5132

Re: IBM LPFK & Arduino Nano.

Here are some photos of my hideous work. I tried to build it all into a project box on the first try instead of piloting it raw like I usually do... Guess I learned my lesson when it looked like ass and I had to rip it all out. It's not so bad. Rework is the name of the game with these one-offs. Wo...
by MMcM
01 Jun 2021, 17:36
Forum: Workshop
Topic: IBM LPFK & Arduino Nano.
Replies: 50
Views: 5132

Re: IBM LPFK & Arduino Nano.

There isn't any documentation that comes with these cheapo MAX3232 breakout boards. But I have confirmed that the + and - signals are VCC and GND (that is, TTL level power -- which makes sense since the charge pump outputs aren't for use in a circuit) on both left and right. As well as front and bac...
by MMcM
01 Jun 2021, 05:23
Forum: Workshop
Topic: IBM LPFK & Arduino Nano.
Replies: 50
Views: 5132

Re: IBM LPFK & Arduino Nano.

Hmm. The pin numbering looks right. The way to keep from getting messed up by mirror images and male vs. female is that 3 and 4 are closer to one another than 4 and 5. The table also looks right. 3 to RS-232 pointing into board and out from there to RX. 8 to RS-232 pointing out of board and in from ...
by MMcM
30 May 2021, 04:27
Forum: Workshop
Topic: Apollo 7121
Replies: 0
Views: 359

Apollo 7121

This is not a particularly nice keyboard to type on. Apollo-case.jpg It uses a Micro Switch Silent Tactile membrane and is 106ST13-2E-J. 106ST13-2E-J.jpg This particular board has some scratches. Apollo-back.jpg There were also some broken keys that needed to be glued and even worse some that appare...
by MMcM
26 May 2021, 03:17
Forum: Other external
Topic: Great/Interesting Finds
Replies: 25286
Views: 2831409

Re: Great/Interesting Finds

DataVue 25 keyboard

https://www.ebay.com/itm/234024809821

Omron switches, I believe.

It's hard not to get the impression that as the design neared the end it was just a matter of, "well, I have this key left and this position unfilled."
by MMcM
26 May 2021, 01:52
Forum: Workshop
Topic: Seeking Soarer - evidence thread
Replies: 620
Views: 20841

Re: Seeking Soarer - evidence thread

https://deskthority.net/viewtopic.php?p=90676#p90676 Sorry, no source. It probably will become open eventually, but for now at least I don't want there to be forks. https://deskthority.net/viewtopic.php?p=145673#p145673 There's one big problem with that idea - I haven't released the source code yet,...
by MMcM
24 May 2021, 16:47
Forum: Workshop
Topic: Micro Switch 69SD5
Replies: 7
Views: 1790

Re: Micro Switch 69SD5

Do you reckon you could handle this fella? See here , which if not the same is very close. It's at the borderline for what can be made into a USB keyboard without rewiring: it sends key down codes (not ASCII and not affected by shifts) via strobed parallel, with the shifts output separately. So you...
by MMcM
24 May 2021, 04:26
Forum: Keyboards
Topic: Best Keyboards Ever: A Deep Dive (Documentary)
Replies: 62
Views: 2775

Re: Best Keyboards Ever: A Deep Dive (Documentary)

There are, I will claim, better vintage keyboards. But it isn't practical to work any of them into this, so the hyperbole is fine. Out of curiousity, which ones are you thinking of? Since this is about typing experience and ergonomics, and since I have a decade or more of experience from back in th...

Go to advanced search