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37 Cards in this Set

  • Front
  • Back
IRQ stands for?
Interupt Request
PIC stands for?
Programmable Interupt Controller
ISA stands for?
Industry Standard Architecture
APIC stands for?
Advanced Programmable Interrupt Controller
Which is more intricate APIC or PIC?
APIC
What is an interrupt?
An asynchronous signal from hardware or software indicating the need for attention
What is Intel 8259 a family of?
PICs
On the XT, what IRQ number did the keyboard controller have?
1
When did the number IRQs double from 8 to 16?
With the introduction of AT class PCs
What is the most common IRQ conflict?
Between 2 COM ports
IRQ2 is sometimes refered to as?
The cascade interrupt
In newer boards, IRQ2 and IRQ9 are effectively?
the same interrupt
On the XT, what was IRQ 0?
System Clock
On the XT, what was IRQ 1?
Keyboard controller
On the XT what was IRQ 2?
reserved.
On the XT, what was IRQ 3?
COM 2, COM4
On the XT, what was IRQ 4?
COM 1, COM 3
On the XT what was IRQ 5?
LPT 2
On the XT what was IRQ 6?
floppy controller
On the XT what was IRQ 7?
LPT 1
On the AT what was IRQ 0?
system timer
On the AT what was IRQ 2?
cascade IRQ, same as 9
On the AT, what was IRQ 3?
Com 2, Com 4
On the AT, what was IRQ 4?
Com 1, Com 3
On the AT, what was IRQ 5?
LPT 2
On the AT what was IRQ 6?
floppy drive controller
On the AT what was IRQ 7?
LPT 1
On the AT, what was IRQ 8?
Real Time Clock
On the AT, what was IRQ 9?
cascade IRQ, same as 2
On the AT, what was IRQ 10?
available for use
On the AT, what was IRQ 11?
available for use
On the AT, what was IRQ 12?
available for use
On the AT, what was IRQ 13?
Math coprosser
On the AT, what was IRQ 14?
Primary hard drive controller
On the AT, what was IRQ 15?
Secondary hard drive controller
Were IRQ assignments ever flexible on the AT?
yes
These have a system resources assigned using one of the COM combinations
COM Ports