INTRODUCTION TO MICROPEOCESSOR
MICROCOMPUTER SYSTEM
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
These are inputs that interrupt request input to the 8259A.
|
|
INT
|
|
|
INTO
|
|
|
IR
|
|
|
IRET
|
Explanation:
Detailed explanation-1: -An 8-bit register in which the tracks of active interrupt requests are kept. Whenever activation of an interrupt request input is done the bit corresponding in IRR register is set to 1.
Detailed explanation-2: -The Intel 8259A Programmable Interrupt Controller handles up to eight vectored priority interrupts for the CPU. It is cascadable for up to 64 vectored priority interrupts without additional circuitry.
There is 1 question to complete.