Search found 55 matches

by Coeus
25 Dec 2020, 12:31
Forum: Keyboards
Topic: Keyboards should include 8-bit computers in them
Replies: 35
Views: 1228

Re: Keyboards should include 8-bit computers in them

What I would love is a good way for keyboards to send Unicode directly to the computers they connect to rather than just keycodes.... The X Window System (X11) sends key events to applications both a keycode (to identify which physical key was pressed) and a translation, i.e. if the context within ...
by Coeus
24 Dec 2020, 02:25
Forum: Keyboards
Topic: Is it possible to convert an IBM Model M to Model F?
Replies: 23
Views: 998

Re: Is it possible to convert an IBM Model M to Model F?

You can get very close to a standard ANSI layout. https://geekhack.org/index.php?topic=48786.msg1048948#msg1048948 Yes, the 122 key terminal keyboard is close but the model F version is not common and those that are around are much more expensive than the recreated model F. The Model M version of t...
by Coeus
19 Dec 2020, 20:58
Forum: Keyboards
Topic: Is it possible to convert an IBM Model M to Model F?
Replies: 23
Views: 998

Re: Is it possible to convert an IBM Model M to Model F?

Aren't those two completely different systems for signal creation? One is based on the change on capacitance due to the hammer connecting two contact plates on the PCB and the other one on closing a circuit between conductive parts on the membrane. That probably means, the electronic circuits on bo...
by Coeus
04 Dec 2020, 23:27
Forum: Keyboards
Topic: Too much retr0bright?
Replies: 11
Views: 664

Re: Too much retr0bright?

In the case of the stock photo you don't know the colour of the light illuminating it, how the camera was handling white balance or whether someone has fiddled with the colours in photo-shop afterwards. The colour of the light does make a big difference too - in any whitish light there will be a spe...
by Coeus
03 Dec 2020, 21:16
Forum: Keyboards
Topic: Too much retr0bright?
Replies: 11
Views: 664

Re: Too much retr0bright?

...I think the ABS spacebar color matches the PBT keycaps, so that's good, but I didn't trust my memory enough to tell if the retr0brighted case looked close to original or not.... If the PBT keycaps are all the others than the spacebar then I am not sure I agree. The spacebar looks a purer white a...
by Coeus
03 Dec 2020, 19:27
Forum: Keyboards
Topic: Loudest keyboard out there?
Replies: 22
Views: 867

Re: Loudest keyboard out there?

cakeanalytics wrote:
03 Dec 2020, 18:47
Now imagine an office full of them.
I wonder how many people now have hearing defects or tinitus as a result.
by Coeus
12 Oct 2020, 12:32
Forum: Keyboards
Topic: Model F Technical Manual Project
Replies: 137
Views: 8270

Re: Model F Technical Manual Project

This is the photo I refer to in my previous post.
screenshot.png
screenshot.png (243.18 KiB) Viewed 1145 times
by Coeus
12 Oct 2020, 12:30
Forum: Keyboards
Topic: Model F Technical Manual Project
Replies: 137
Views: 8270

Re: Model F Technical Manual Project

I opened the larger version in evince and it is working fine for me. I did notice that the first photo in the "Photos of Brand New Models" looks quite distorted - the the one that says it is just a placeholder. Note that the front edge appears to be curved when I assume it is straight and whole keyb...
by Coeus
17 Sep 2020, 22:26
Forum: Keyboards
Topic: How to get into custom keyboards?
Replies: 12
Views: 846

Re: How to get into custom keyboards?

That's interesting. Though I have not done it myself I know it is possible to design a PCB and then have that design made up. Is the same true of a metal plate? I assume a case would be the most difficult part as most cases are moulded and making the moulds has a lot of set-up cost.
by Coeus
15 Sep 2020, 21:38
Forum: Keyboards
Topic: Do the orihalcon Soarers have pull ups?
Replies: 31
Views: 1265

Re: Do the orihalcon Soarers have pull ups?

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. It looks like DB5 and DB6 are being used as outputs here. The open collector buffers in IC2 are drawn so the signal goes through them as if they are an arrow, i.e. ...
by Coeus
15 Sep 2020, 21:07
Forum: Keyboards
Topic: Do the orihalcon Soarers have pull ups?
Replies: 31
Views: 1265

Re: Do the orihalcon Soarers have pull ups?

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...
by Coeus
15 Sep 2020, 20:48
Forum: Keyboards
Topic: Do the orihalcon Soarers have pull ups?
Replies: 31
Views: 1265

Re: Do the orihalcon Soarers have pull ups?

Here are some pics:
20200801_025007_1008.jpg
20200801_025007_1008.jpg (179.3 KiB) Viewed 695 times
20200801_025007_1008_01.jpg
20200801_025007_1008_01.jpg (260.33 KiB) Viewed 695 times
the second one is just a crop of the first by focuses in on what I think may be the circuit driving the cable. It's hard to tell because am unable to decode the chip numbers.
by Coeus
15 Sep 2020, 20:29
Forum: Keyboards
Topic: Do the orihalcon Soarers have pull ups?
Replies: 31
Views: 1265

Re: Do the orihalcon Soarers have pull ups?

Inxie wrote:
15 Sep 2020, 20:25
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.
by Coeus
15 Sep 2020, 20:12
Forum: Keyboards
Topic: Do the orihalcon Soarers have pull ups?
Replies: 31
Views: 1265

Re: Do the orihalcon Soarers have pull ups?

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...
by Coeus
15 Sep 2020, 02:18
Forum: Keyboards
Topic: Do the orihalcon Soarers have pull ups?
Replies: 31
Views: 1265

Re: Do the orihalcon Soarers have pull ups?

...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...
by Coeus
14 Sep 2020, 19:14
Forum: Keyboards
Topic: Do the orihalcon Soarers have pull ups?
Replies: 31
Views: 1265

Re: Do the orihalcon Soarers have pull ups?

No not diapers, resistors. The eBay seller orihalcon has been Soarers converters for a while now and seemingly the only authorized one. Authorised by Soarer? I thought he just disappeared but could, of course, have been in private conversation. While it worked, I always had one problem or another w...
by Coeus
14 Sep 2020, 18:34
Forum: Keyboards
Topic: Do the orihalcon Soarers have pull ups?
Replies: 31
Views: 1265

Re: Do the orihalcon Soarers have pull ups?

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 ...
by Coeus
11 Sep 2020, 18:46
Forum: Off-topic
Topic: how fast do you type?
Replies: 44
Views: 3825

Re: how fast do you type?

Another thing in comparing like with like: I have discovered I am faster typing a line of text during which I can read ahead and slower when presented with random words as part of a game. I suspect there will also be a difference between proper sentences and lines of random words.
by Coeus
31 Aug 2020, 14:38
Forum: Keyboards
Topic: model m leds blinking when overloaded with keypresses?
Replies: 12
Views: 628

Re: model m leds blinking when overloaded with keypresses?

Probably you're right about the rollover, because it happens when I'm typing quite fast, so maybe this behaviour can trigger some kind of involountary multi key rollover. Key rollover pre-dates the concern about lots of modifiers or games where each key is effectively an independent control and was...
by Coeus
28 Aug 2020, 16:30
Forum: Keyboards
Topic: Foam Dampening of old keyboards?
Replies: 15
Views: 1058

Re: Foam Dampening of old keyboards?

It is intersting that this should come up now. I think it has been believed that the purpose of the foam in the IBM Model F is to keep the key barrels securely in place because it was not possible to make the two metal plates and their locking tabs accuratly enough. But I have been directed form her...
by Coeus
25 Aug 2020, 15:54
Forum: Keyboards
Topic: A little love for Unicomp
Replies: 25
Views: 1407

Re: A little love for Unicomp

I know that it would mean that I'd have to find a source to support this comment, but I remember someone said that Lexmarks and/or Unicomps use a different plastic blend than IBM, thus they can yellow... One of the nice things about my Model F is the lack of yellowing despite being made in 1981 so ...
by Coeus
24 Aug 2020, 22:54
Forum: Keyboards
Topic: A little love for Unicomp
Replies: 25
Views: 1407

Re: A little love for Unicomp

IMO, if you * need * a brand new keyboard, I'd direct you to Unicomp. Inexpensive, it'll last, and it has a warranty. It's also cheaper that a, "It needs nothing. Includes Soarer's Converter!" Model M. Additionally, when I'm talking Model M, I'd have to specify that you'd have to check to make sure...
by Coeus
24 Aug 2020, 22:42
Forum: Keyboards
Topic: Key Strangeness of an IBM Model F
Replies: 15
Views: 948

Re: Key Strangeness of an IBM Model F

If so, the guy in this video doesn't use foam at all and it works fine (see also the comments). I have finally got round to watching that video. It seemed to turn out well in the end but I am glad that was not the first Model F restoration video I watched as he makes what I would consider to be a c...
by Coeus
24 Aug 2020, 21:42
Forum: Keyboards
Topic: Model F Technical Manual Project
Replies: 137
Views: 8270

Re: Model F Technical Manual Project

...Maybe you can review 1.6 and 1.7 (page 23 tp 27) when you find time? Ok, that prompted me to start reading the document so I also have some other comments. Page 14, the table of original IBM variants. It is probably worth distinguishing between protocols and scan code sets. Set 1, 2 and three re...
by Coeus
24 Aug 2020, 14:45
Forum: Keyboards
Topic: Model F Technical Manual Project
Replies: 137
Views: 8270

Re: Model F Technical Manual Project

I realise in my last post I glossed over something. In Tom Wong's description there some capacitance between the pads at all times, whether they key is down or up, but it is different in each state and, on the Model F, it is greater when the key is down. So at the exact moment the voltage is applied...
by Coeus
24 Aug 2020, 14:07
Forum: Keyboards
Topic: Model F Technical Manual Project
Replies: 137
Views: 8270

Re: Model F Technical Manual Project

Huge thanks! How could I have missed that doc :o ? I did take a first read through but I definitely have to absorb and understand it first, before I correct (well, re-write) my version. Updates will follow ... On any keyboard that uses a matrix there is not permanent power to any of the keys. The c...
by Coeus
24 Aug 2020, 13:51
Forum: Keyboards
Topic: Key Strangeness of an IBM Model F
Replies: 15
Views: 948

Re: Key Strangeness of an IBM Model F

Not trying to be snarky. I'm not an electrician in any way, shape, or form, am I understanding you correctly that you're saying the foam is necessary so you don't have a short? I don't believe it serves as insulation. If it were missing it would be the square bases to the barrels that would be in c...
by Coeus
24 Aug 2020, 13:44
Forum: Keyboards
Topic: Can I convert this?
Replies: 6
Views: 636

Re: Can I convert this?

That connector does not look like a normal XT or AT keyboard connector (180 degree 5-pin DIN) or even the kind used on the IBM terminal keyboards (240 degree 5-pin DIN). But, as long as it outputs something from that connector as the keys are tapped then it should be possible to build a converter us...
by Coeus
24 Aug 2020, 13:38
Forum: Keyboards
Topic: Soarer's Converter error.
Replies: 11
Views: 501

Re: Soarer's Converter error.

That is actually the third way I've been seeking XD I can reprogramme the keyboard through PS/2 port on another PC via Genovation's programme because it will allow direct control. And just use it through stock soarer's converter because it does seems to convert the keys properly! Thanks for the tip...

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