1. Hardware interrupts make use of two of such input signals namely this, except...
a. NMI (Non maskable Interrupt)
b. INTR (Interrupt Request)
c. PIC (Programmable Interrupt Controller)
2. In a standard PC the PICs are programmed such that the master PIC generated the
interrupt number...
a. 0-7 for IRQ0 –IRQ7 respectively
b. 8-15 for IRQ0 –IRQ7 respectively
c. 16-23 for IRQ0 –IRQ7 respectively
3. IRQ 0 has the...
a. same priority
b. lowest priority
c. highest priority
4. The PIC has to be notified about the return of the previous interrupt by the...
a. ISR routine
b. IMR routine
c. IRR routine
5. following is characteristic of ICWs, exept...
a. ICW programmed at time of boot up
b. ICW are used at run-time.
c. ICW are used to program the operation mode like cascade mode or not
also it is used to program the function of PIC i.e if it is to invoke interrupts
08~ 0FH or 70-77H on IRQ request.
6. following is characteristic of ICWs, exept...
a. OCW is used signal PIC EOI
b. OCW are used at run-time.
c. OCW are used to program the operation mode like cascade mode or not
also it is used to program the function of PIC i.e if it is to invoke interrupts
08~ 0FH or 70-77H on IRQ request.
7. The circular keyboard buffer starts at the address
a. 40:1AH and contains 32 bytes
b. 40:1EH and contains 32 bytes
c. 40:1CH and contains 32 bytes
8. The interval timer has 3 channels each channel is 16 bit wide. What port used as
the command register?
a. port 41
b. port 42
c. port 43
9. the port 61h Bit 0 is used to...
a. control the speaker
b. connect the interval timer to the speaker
c. turn the speaker on off
10. A value of 0xb4 is loaded into the...
a. command register 0x43
b. command register 0x42
c. command register 0x61