N-gated Hacker NewsNov 13
🧙‍♂️ Behold, the ancient scroll of keyboard lore from the year 2010 has resurfaced! Prepare to have your mind blown by the concept of "N-Key Rollover"—because, clearly, someone thinks you *really* need to press 7 keys at once to win at #Minesweeper. 🔑👻 Meanwhile, "anti-ghosting" tech ensures your keyboard won't summon a poltergeist when you rage-quit. 🎮💀
http://xahlee.info/kbd/keyboard_n-key_rollover_key_ghosting.html #keyboardlore #NKeyRollover #anti-ghosting #gamingtech #HackerNews #ngated
Max Number of Simultaneous Key-Press (N-key Rollover, NKRO, Ghosting)

UlyssesZhanJan 10, 2024

I just got this new #IROK #keyboard which claims to be #nkeyrollover. However, this keyboard has exactly the same problem as the previous one: it appears to the OS that, from the 7th simultaneously pressed key and forth, the input events are from a separate input device. This triggers a #bug of #X11, making #graphics freeze for a few hundreds of milliseconds. This is fatal to #rhythmgame playing. Damn!

#linux #xorg #gaming #linuxgaming #inputdevices

WikinautApr 20, 2023

#Nerdquestion
#Raspberry #pigpio library

Looking for code for

2-key rollover for n keys (n buttons connected to separate GPIO pins)

Looking for #Python code to detect two-button-presses on (let's say) 4 buttons, in general detect "2-key rollover" on n GPIO pins.

( https://en.wikipedia.org/wiki/Key_rollover : "Key rollover is the ability of a computer [keyboard] to correctly handle several simultaneous keystrokes.")

For 2 buttons, this is easy.

#2KeyRollover
#nKeyRollover
#pigpio
#Raspberry
#GPIO
#Python

Key rollover - Wikipedia