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AT2XT keyboard converter

I tested this AT to XT keyboard converter with Juko ST motherboard and a PS2 keyboard. Almost everything works well, including SHIFT, CAPS LOCK and CTRL keys. However, I have a minor problem. When playing Prince of Persia 1 on this XT using the converter, the SHIFT key is not recognized and I can't take small steps by pressing SHIFT+Arrow key. If I do that, the prince will still take a normal step as if SHIFT wasn't pressed. The SHIFT key works well in the same game (for example, when drinking a potion), in MS-DOS and also in other apps so I am not sure what the issue is.

Does anyone have the same problem?
 
Stone said:
You might get a more definitive answer by borrowing an XT keyboard.
Click to expand...

Nobody around here owns an XT keyboard. The only XT keyboard that I have here has many dead keys and can't really be used. eBay wants at least $100+ for an XT keyboard in unknown condition. I believe the SHIFT key issue is timing-related, e.g. Prince of Persia makes some assumption on timings to detect Shift-Arrow combinations, which work well with an original keyboard but not with the converter.
 
Last edited:
mdanh2002 said:
I tested this AT to XT keyboard converter with Juko ST motherboard and a PS2 keyboard. Almost everything works well, including SHIFT, CAPS LOCK and CTRL keys. However, I have a minor problem. When playing Prince of Persia 1 on this XT using the converter, the SHIFT key is not recognized and I can't take small steps by pressing SHIFT+Arrow key. If I do that, the prince will still take a normal step as if SHIFT wasn't pressed. The SHIFT key works well in the same game (for example, when drinking a potion), in MS-DOS and also in other apps so I am not sure what the issue is.
Does anyone have the same problem?
Click to expand...
In post #493 of the AT2XTKB development thread, member schnurzel posted some alternative code for the AT2XTKB.
The link to that post is [here].
In the later posts of #499 and #528, other members reported that the alternative code fixed some issues.
Maybe you should try that code.
 
modem7 said:
In post #493 of the AT2XTKB development thread, member schnurzel posted some alternative code for the AT2XTKB.
The link to that post is [here].
In the later posts of #499 and #528, other members reported that the alternative code fixed some issues.
Maybe you should try that code.
Click to expand...

Thanks for the link! Let me try with the updated code ...
 
Not that I am aware of, but you can order them, yourself, based on the PCB designs that Scott and I have both posted to OSHPark, and then build one, using commonly-available parts. It's not at all a difficult process.

- Alex
 
When the vcf.org was created from vintage-computer.com, someone forgot to update attachment links. Fortunately, I happen to have the file here:

You know, my attachments are really for public consumption. Is there any way I can simply expose the entire lot of them, without having them linked to messages?
 

Attachments

  • XTATK090.ZIP
    11.2 KB · Views: 28
I've had a few emails lately asking about PC boards and assembled units. I got a bit carried away and ordered/built up a batch of these with 3D printed cases etc. I still have some spares if anyone is looking for one.

- Gary
 
Hi,

I found this keyboard: key tronics E03602 EL FR (french one).

IMG_20191121_183650.jpg IMG_20191121_183644.jpg

It seems XT compatible, but these are not switches on the second photo. Instead there are 3 holes. Do I need to solder switches myself? For XT compatibility I have to connect the 3 of them? It is not clear to me how to configure it.
 
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