In todays edition of "stuff that I found in my storage" a PS/2 meme
Image transcription:
mov rax, rbx add rax, rcx HELLO IT'S THE KEYBOARD I HAVE AN IMPORTANT MESSAGE E
Does USB not use interrupts?
this post was submitted on 05 Oct 2024
9 points (100.0% liked)
Programmer Humor
19572 readers
1983 users here now
Welcome to Programmer Humor!
This is a place where you can post jokes, memes, humor, etc. related to programming!
For sharing awful code theres also Programming Horror.
Rules
- Keep content in english
- No advertisements
- Posts must be related to programming or programmer topics
founded 1 year ago
MODERATORS
No. It's polling based
Actually it's both, there's polling with a timeout interrupt if an incoming urb hasn't been processed quickly.
https://crlab.ece.ucr.edu/usbgps/ohci_uhci.html
This way you can take them in batches at regular intervals.
Underrated meme
Help me understand pls?
Ps/2 keyboards used interrupt when transferring data, meaning instead of waiting for the cpu to get the data it is trying to send when it is free, it will just interrupt what the cpu is currently doing and tell it to process what the keyboard is sending.
What bothers me the most here is that those are 64 bit instructions, which did not exist when PS/2 was a Thing. But I still chuckled, nice work.
Back then our registers were 32 bits wide, and we liked it 🤣
Ah yes, the little old interrupt
Alright this has me giggling this morning