Programmable Interrupt Controller

  • Thread starter Thread starter bob
  • Start date Start date
B

bob

I have a D820LP motherboard for a Dell, and I'd like to find the
Programmable Interrupt Controller chip on it and see how it's
connected to the CPU. I've looked all over the board, and I don't
see anything that says 8259A or APIC. Any ideas how to find this?

Or, does anyone have any photos showing a PIC connected to a CPU?

Thanks.
 
I have a D820LP motherboard for a Dell, and I'd like to find the
Programmable Interrupt Controller chip on it and see how it's
connected to the CPU. I've looked all over the board, and I don't
see anything that says 8259A or APIC. Any ideas how to find this?

Or, does anyone have any photos showing a PIC connected to a CPU?

Thanks.
Click to expand...

If the ICH0 Southbridge is on your motherboard (because I'm not
certain of the chipset details)...

82801AA / 82801AB Southbridge ICH / ICH0
http://download.intel.com/design/chipsets/datashts/29065503.pdf

PDF page 3 says ICH0 Southbridge has inside it:

"Interrupt Controller
-Two Cascaded 82C59
-Integrated I/O APIC Capability
-15 Interrupts Support in 8259 Mode,
24 Supported in I/O APIC Mode.
-Supports Serial Interrupt Protocol"

And on PDF page 34 it explains the interrupt interface on the ICH0.

HTH,
Paul
 
Back
Top