USB Keyboard - slow response/dropped keypresses


Author Message
Amnesie
Guru

Joined: 30/06/2020
Location: Germany
Posts: 746
Posted: 04:56pm 04 Jul 2025      

I think I discovered something important...

Like Lyle, I tested the same key patterns on all my keyboards and guess what? every keyboard has different "problem-spots"



Keyboard ONE: w e r t          (fast typed in one movement - even as fast as I can!)
No problem!

Keyboard ONE: d a s            (fast and moderat typed "a" is missing in 100% of the cases, slow without rollover it works)
Resulting in: d s

------------------------------------------------------------------------------

Keyboard TWO: w e r t          (fast typed in one movement)
Problems! Resulting in: w e r  (t is missing in 100% of the cases)

Keyboard TWO: d a s            (fast typed in one movement)
No problem!

-------------------------------------------------------------------------------

This would explain, why this is so hard to track and most have no problems at all:

1. Peter you are right in some way, because it definitly varies between keyboards and I can imagine if one is typing really slow, it is likly that he has never a problem

2. even if it is different on my tested (five) keyboards, every keyboard has specific problem spots, which are not there in the "NoOne" converter firmware.

3. I tested 4 keyboards which support PS/2 AND USB protocol, sadly I have only ONE real pure USB keyboard. But all of them have problems (even the pure USB one).


EDIT: Ah! You've posted at the same time a new firmware, I test it in a half hour and report.

Greetings
Daniel
Edited 2025-07-05 02:58 by Amnesie