IBM Model F 6110347 NKRO? (Soarer vs xwhatsit)

[antdes457]

Hi all,

New here. I have received a 122-key Model F with Soarer's mod from eBay yesterday.

The keyboard works very well and is very good and clean condition. However, I'm noticing problems with simultaneous key presses. While the keyboard seems to register an infinite amount of non-simultaneous key presses, It seems to be limited to 3-4 keys with some key combinations. Is this a limitation from the IBM controller that xwhatsit's controller could fix, is it limited by the keyboard design or am I exceeding some simultaneous keypress buffer in the Soarer controller or USB HID?

I bet someone has the answer but Google and forum search hasn't found an answer so far.

Thanks!

EDIT: Key combinations like 234we won't always register every keys.

[Jotokun]

Interesting. I haven't had any problems in regular use, but trying that 234we combo drops a key occasionally on mine as well.

I'm on Soarers, so I can't offer any insight as to why that happens.

[antdes457]

A bit more testing results, it looks like many 5 key clusters won't completely register if they're on multiple row/columns, but I always get a minimum of 3 registered keys. 

With Shift pressed, 4+ other simultaneous keypresses will even remove the modifier key.

We'll have to compare with people using tmk_keyboard, xwhatsit's controller on the F, and Soarer on other NKRO keyboards I believe.

[antdes457]

Moved to a xwhatsit controller and it's fixed now.

[katushkin]

6 million key rollover? That's impressive.