Keyboard: n-key rollover?

PicoCalc
1

Hi all, I’m receiving my PicoCalc soon.

I’d like to know: is the keyboard matrix wired correctly with a diode for each button? In other words, would it be possible to have n-key rollover in hardware? If it requires writing firmware to handle it, I’m fine with it.

I didn’t see any plans for the hardware on Github, did I just something?

2 Likes
2

Based on the schematic, it does not look like the matrix has diodes on it (aside from the LEDs).

3

Thanks for the link to the schematic. Yes, it doesn’t have diodes. I received the PicoCalc and I can see the key switches aren’t good enough for n-key rollover to make sense anyway. Too bad.