Chapter 25 Flashcards
1
Q
What is purpose of memory
A
It is for program and its data to be executed. It does not control any hardware.
2
Q
I/O uses how many bits of address bus
A
16 bits
3
Q
MOV does what
A
When MOV is given, the processor selects the memory address space.
4
Q
Port number 20 and 21 are for which component
A
PIC
5
Q
Port number 60 to 64 are for which component
A
Keyboard
6
Q
Port number 378 is for which component
A
parallel port
7
Q
Why we use EOI
A
Otherwise lower priority interrupts will remain disabled
