[SOLVED] ATA Interrupt for PIO

Question about which tools to use, bugs, the best way to implement a function, etc should go here. Don't forget to see if your question is answered in the wiki first! When in doubt post here.
Post Reply
HugeCode
Member
Member
Posts: 112
Joined: Mon Dec 17, 2012 9:12 am

[SOLVED] ATA Interrupt for PIO

Post by HugeCode »

Hi all. I have a simple newbie question. I read this page and I found this:

Code: Select all

7. .........
8. Wait for an IRQ or poll
9. ...........
What will this IRQ signalize and what does it mean 'poll'? Why are there two possibilities?
Last edited by HugeCode on Tue Apr 16, 2013 9:49 am, edited 1 time in total.
Top
User avatar
iansjack
Member
Member
Posts: 4711
Joined: Sat Mar 31, 2012 3:07 am
Location: Chichester, UK

Re: ATA Interrupt for PIO

Post by iansjack »

The link you gave explains this: http://wiki.osdev.org/ATA_PIO_Mode#Poll ... s_vs._IRQs
Top
Mikemk
Member
Member
Posts: 409
Joined: Sat Oct 22, 2011 12:27 pm

Re: ATA Interrupt for PIO

Post by Mikemk »

The IRQ means that the drive will tell the PIC to tell the CPU to call your interrupt handler
Polling is repeatedly checking the status register
Programming is 80% Math, 20% Grammar, and 10% Creativity <--- Do not make fun of my joke!
If you're new, check this out.
Top
Post Reply

Return to “OS Development”