1. Which chip is called a port?

a. port authority.

b. peripheral interface adapter .

c. cmos.

2. Devices may be connected directly to the I/O port?

a. always.

b. frequently

c. rarely.

3. Which chip has a data direction register?

a. ROM chip.

b. I/O port chip.

c. both of these.

4. What does "IN AX" stand for?

a. opposite of EXIT AX.

b. load AX register from I/O port.

c. compare A register to X register.

5. Which is not a flag in the control register?

a. NR.

b. OV.

c. OR.

6. How many address lines in, prorgammable I/O, are needed to address 300 locations?

a. 9.

b. 30 x 10.

c. 3 + 0 +0.

7. What does "INT" stand for?

a. Input to T register.

b. clear interupts.

c. stop present processing

8. Which is a DAC?

a. direct access counter.

b. dumb analog counter

c. digital analog converter

9. Which of these is is a hexadecimal?

a. 4.

b. 01011000.

c. 199E.

10. During an interupt, the present instruction's address is stored where?

a. high memory.

b. a memory stack .

c. the accumulator?