Search found 2 matches
- 24 Sep 2018, 17:31
- Forum: Keyboards
- Topic: Adjusting the clock frequency of a PC keyboard.
- Replies: 4
- Views: 2762
Thank you for the comprehensive reply. I should clarify that the host system I am dealing with is decades old and is a PC-XT clone. From the specs I've seen, the XT keyboard clock frequency should fall into a range between 10 - 16 khz. When I connect an XT keyboard and set my host to CGA mode, the ...
- 24 Sep 2018, 04:54
- Forum: Keyboards
- Topic: Adjusting the clock frequency of a PC keyboard.
- Replies: 4
- Views: 2762
Adjusting the clock frequency of a PC keyboard.
Hello, I'm looking for advice on a custom keyboard controller, like using a Teensy. My host PC was designed strangely, it samples (that is latching at fixed times) the keyboard clock using the horizontal sync of the video chip. This means that when the host system is in CGA mode, data from the ...