deskthority

My Model F.

Here's mine.

Apple pen is from when I worked at Apple some time ago. they gave them to us as gifts and I just held on to it..

Hak Foo wrote: ↑

13 Feb 2021, 00:42

No chance Z, X and N are rotated 180 degrees?

Those are definitely upside down.

Stupid question but, did you try isopropyl alcohol and just a lot of elbow grease? Since it's a Model M they aren't usually painted plastics (like my Model F), so IPA should be fine on it.

I think this depends on the capacity of the controller used. The tools (which you need to disable Defender on because it flips its rocker) that are included with the utility can tell you how much free space you have.

swampangel wrote: ↑

21 Aug 2019, 23:31

with the legs just bent and soldered parallel to the pcb.

Precisely what I do when repairing PS/2 floppy drives.

You are right, I have an earlier 122 without the depression. I was looking at mine and thought he grafted that onto his. Or milled it out... Yea there's several versions of the M122. Later models had it, which I think is the tooling Lexmark got, which Unicomp actually used the LED's for. Unicomp se...

Misread you, thought you said "good luck with that LED problem!" Like sarcastic. You like modern, nothing wrong with liking modern. I don't like it. Everybody got their own thing. The part I am confused about is the depression groove around the lock lights... was that already there or added on? Goo...

depletedvespene wrote: ↑

21 Sep 2020, 17:31

s-l1600.jpg

That's not even remotely comparable or the same. Yes it's the same keys, but that's where similarities end.

So there's two pads actually under an ANSI shift. See my Unicomp for example, it's an American ISO model but with an ANSI left shift (it came this way). The left hole registers LSHIFT, but the right hole that doesn't have a flapper, actually when pressed with a q-trip, presses \| as well. So since y...

Misread you, thought you said "good luck with that LED problem!" Like sarcastic. You like modern, nothing wrong with liking modern. I don't like it. Everybody got their own thing. The part I am confused about is the depression groove around the lock lights... was that already there or added on? Goo...

I still don't get why people still use odl and potentially trashed keyboards. anyways, good find! I hope you figure out your LED problem Because they tend to work better than a lot of newer stuff? Every single one of my newer mechanical keyboards has chatter of some sort by now after a few years of...

I'm curious — can you tell that the keyboard actually sent different USB codes (e.g. with USBPcap )? My IBM M122 uses Set 3 and sends different code, but presumably the Unicomp PS/2 M122 uses Set 2 and doesn't. Alright here we go. Top right \| key: https://i.imgur.com/AkPB3O8.jpg Bottom left hidden...

I'm curious — can you tell that the keyboard actually sent different USB codes (e.g. with USBPcap )? My IBM M122 uses Set 3 and sends different code, but presumably the Unicomp PS/2 M122 uses Set 2 and doesn't. I will have to get back to you at least after 6pm EST (or am I in EDT now? I lost track)...

I did once make my keyboard send that code, but it didn't work in Linux or MS-Windows. Interesting. It should work in Windows according to MS docs and it should work in Linux according to source — but it will be treated just like ‘normal’ [\|]. If this is what I think, I have a Unicomp M122, it is ...

2B is shared by both of those physical locations (and they are functionally the same). Of course, that depends on the scan code set - much more info to be found in John J. G. Savard's article: http://quadibloc.com/comp/scan.htm Though, interestingly enough, if I use "gzdoom", and set the / key on m...

ISO keyboard in Switch Hitter (funny how that key registers as \ in switch hitter, but is physically the one you mentioned).


And my ANSI American keyboard.


BIOS scan code is the same, but the HID scan code is different.

Give me a second, my ThinkPad has an ISO UK keyboard.

Btw, don't worry orihalcon, not asking for a refund or anything like that. In fact I'd be happy to work with you in any way shape or form. I just don't know how to open up the USB shell, and don't want to use an xacto knife, I'm on blood thinners, that could have the potential of ending badly for me...

Coeus wrote: ↑

15 Sep 2020, 21:38

It looks like DB5 and DB6 are being used as outputs here.

Correct, XT protocol keyboards are unidirectional. You cannot speak to the keyboard at all, they are purely outputs only.

Pull up is different on clock in the keyboard because if you look closely, clock is going to INT and DB5, while data only goes to DB6.

Interesting, you have an 8049, mine has an 8749. Generally the same but mine is technically erasable and reprogrammable. Maybe they are slightly different in their high/low thresholds? I assume you're basing that on the fact that mine is in a plastic package because I can't read a part number on it...

Interesting, you have an 8049, mine has an 8749. Generally the same but mine is technically erasable and reprogrammable. Maybe they are slightly different in their high/low thresholds?

Oh shoot you wanted a picture of the MCU as well in the keyboard. I don't feel like taking it apart, but the eBay auction I bought it from took a pic of the inside.

Wait what? Mine just read meg ohms. If they are enabled in software then presumably they are not actually resistors at all but transistors used to behave a like a resistor and are only turned on when power is applied. Funny you mention that, I was having a weird MOSFET feeling based on how the resi...

Adding those two 1K resistors caused it to stop working altogether. Of note, there was already about 2K resistance between +5V and the clock and data lines while unplugged without any modifications... Where did you measure this? At the keyboard, unconnected to the MCU? I had not considered the KB a...

On the boards that aren't working reliably without resistors with my converters, what is the resistance you get when you measure between +5V and clock and +5V and data? Data and clock are almost identical (they are 1 meg ohm off from each other), and I used the 1k ohm resistor I used just to test t...

orihalcon wrote: ↑

15 Sep 2020, 18:49

On the boards that aren't working reliably without resistors with my converters, what is the resistance you get when you measure between +5V and clock and +5V and data?

Give me just a second, I'll find out right now for you.

...Luckily the eBay one for mine did have the shield connected properly so that wasn't it. It turns out my orihalcon does have the shield connected. To my naked eye it appeared to go to a pad that was otherwise n/c but looking at the photos I can see it goes via a plated through hole to a narrow tr...

Is there even a way to look inside one of these orihalcon's? I assume the converter is on the USB side do the over sized plug. I'm not even sure they implement reset either, which I made sure to make an option on my home grown one should I ever require it. Yes, the converter is inside the moulding ...