deskthority

I've got the 6246-A converter mostly working. See here. I will now keep an eye out for one with a DIN connector to confirm that it's the same.

This keyboard, with FLS switches and tombstone keycaps, is from the D210/D211 terminals. There are pictures in the wiki . There are a couple topics about converting one here and here . In both cases, the existing controller was removed and the matrix wired directly. I thought I would see what could ...

Got it out of customs. Here it is with a senior relation. It's interesting; there is a bit of scuffing on the L key. Probably not visible in the photo. I'm not bothered by it, but now I'm curious what happens after the key caps get used for a while. What have you found?

I think the Herman Miller Aeron is OK. I would like more padding. Been using an Ergon since they came out forty-odd years go. https://www.hermanmiller.com/content/dam/hmicom/page_assets/stories/why_magazine/design_q_and_a_bill_stumpf/it_why_design_q_and_a_bill_stumpf_03.jpg.rendition.1920.1920.jpg

Haata has a 118-5237 with Peerless and the PCB says N860-4735. I'm not certain whether it would need to change based on switch type. I have a 6246-A here (someplace) and have been meaning to have a go at figuring it out. Based on the user manuals showing both kinds of connectors, I am inclined to be...

Is this the keyboard for a D411/D461? The key and LED layout seems to match the drawing. If so, the pinout for that 270° DIN-8 would be as listed there. And, based on the signal names given, I am guessing the protocol will be the same as the 6246-A for the D210/D211.

This keyboard looks only superficially similar from the outside. dti-510-case.jpg But inside the PCB is nearly the same and moreover has its TeleVideo part number printed on it. nmb-130947-top.jpg The layout matches the 905 and 965. TeleVideo-905-965-Keyboard.png The protocol is the same. The key ar...

SlowTyper wrote: ↑

20 Mar 2021, 17:49

It has connector like this

https://i.imgur.com/62FvyH8.jpg

11pin connector never heard for such.

I think it may be 13-pin with two of them left out. Like https://www.cuidevices.com/product/reso ... del/sd-130

A couple of ASCII keyboards.

https://www.ebay.com/itm//303927165104

https://www.ebay.com/itm/143983149945

SD-series art piece

https://www.ebay.com/itm/284224502714

Ooh, I'm pretty sure that Blue Alps one is headed this way; very excited.

It remains to be seen whether I remember where are all the function keys are without legends.

There are easy ways to dump 8048/49/50(?) ROMs. I may look into throwing together a little PCB for this as I think it would be very useful to have in the future. You're right; I was confused about which models still had that capability. I do have such a reader here already. I don't think the chip i...

I do not know what progress has been made on this in the last year. But I got a hold of one for a while and did some experiments. There wasn't much question about the pinout, since the photos were clear enough. But to confirm, it is indeed the same as the older models. So, for convenience, I will co...

Okay, yeah, it looks like 9600 is right. The complexity must make sense in the original context. Pressing ALT doesn't do anything right away. But if you keep it pressed, does it affect what other keys send? Have a look at some of the converters in QMK that use serial_recv and implement a state machi...

Did you try any other baud rates than 9600? In particular, something slower? Are the codes stable / reliable? That is, does pressing the same key always give the same codes? There are a few things in there that suggest the timing isn't quite right. First, there are several keys whose key up code is ...

Pi Zero and Pi 4 have USB OTG, but older ones can indeed only be a host. There is even a three key macropad using a Pi Zero. Overkill is all relative. The Teensy 2.0 has a UART and an ADC that we aren't using. Is that a waste? What about even more powerful SOCs like a Cortex-M4, which are becoming c...

Are you comfortable writing an Arduino sketch for your Pro Micro? It's still possible that it really is just plain-old TTY-level RS-232 serial. Connect the data line to RX. In setup, open Serial1 at some baud rate (1200 is a good first guess). In the loop, check available and print any character tha...

https://www.ebay.com/itm/Vintage-HP-Keyboard-46021A-CLICKY-Sound-NEW/402429016542 I remember reading their are two models of this board (46010A and 46011A the former Fujitsu Leaf Spring, the later rubberdome), I believe this is also a rubber dome board based on the part number and thinner printing ...

As noted elsewhere, the RCA APT VP4801 and the Cardinal CP600 are somewhat similar looking (both keys and interface jacks, though in different positions).

I finally got ahold of a 46085A, which does indeed take three addresses (bottom, middle, top) of three axes (left, middle, right) each.

Okay, so the switches are kinda cool looking. And probably horrible to type on.

https://www.ebay.com/itm/154342180598

But what was it supposed to do?

A Micro Switch 55SW parallel ASCII keyboard that seems like it really was adapted for use with a hobbyist system.

https://www.ebay.com/itm/265060072364

It comes with the 16-pin adapter board with what looks like an odd mix of 74-series, 54-series (milspec), and DTL.

Along with cleaning up the code and standardizing the pin mapping, I redid the rather crowded little converter show above into one with a ribbon cable.

I am fairly certain that the AES board KB71SD12 from here works like these others, with an AMI encoder whose only difference is the exact matrix and so the mapping ROM. But, sadly, it seems that chip is shot somehow. The keys themselves work. But the encoder never generates a strobe. The pulse gener...

This Micro Switch SD-16192 / 78SD12-6 board has an AMI encoder. SD-16192-top.jpg SD-16192-bottom.jpg SD-16192-converter.jpg Most switches are 4B3B, 2.5 oz. sink pulse. The key in the lower-left is 4B8B, 8.0 oz., but still a pulse, which is close to synchronized with the strobe pulse. The three keys ...

Trying to fill the Covid lockdown with interesting vintage boards to find, restore, and convert means a steady stream of ones that use a simple parallel ASCII protocol. The idea is this: when a key is pressed, it is converted to US-ASCII by the keyboard and output as a 7-bit (sometimes wider) signal...

I wouldn't rule out jumpers, either. Notice how the signals from the right and top switches loop around to get to the connector. Which means the ones from the left need a way over. If you have a multi-meter, do a quick check whether they're all seven shorted straight across.

I have been working on a board with SD switches. A half dozen of the switches don't operate. This is because someone has installed some sort of inhibitor on them. SD-collar-on-switch.jpg A bit of plastic wraps around the plunger and inserts in a way that prevents it going into the switch itself. The...

I have been working on a board with a Hi-Tek grid. Some of the key caps are replacement blanks. The color and profile is all wrong, but that's not the main thing about them. Hi-Tek-cross-mount.jpg Even though they are blank, they are double-shot, suggesting that they usually had legends. And they ar...

I've had my eye on this, anyone know if this DEC is also a dome? Sweet keycaps though! Pretty sure it's the same kind of switches as, e.g., the LK201-AA. A leaf-spring over membrane. The bit of the mount showing through in the photos in the listing doesn't do anything to contradict that. The keycap...