Data & Address Registers_8086/88 Architecture

Question 1

What are the 2 sets, or “categories” of general registers?

Answer 1

1. Data

2. Address

Question 2

the address registers contain memory addresses and are used to point to ______ __ ________ where data will be retrieved or stored.

Answer 2

locations in memory

Question 3

Data registers are _-bit, but can also _______ as a 16-bit register.

Answer 3

8 ; operate

Question 4

Combining registers is done through a process called….

Answer 4

concatenation.

Question 5

AX

Answer 5

Accumulator register

Question 6

BX

Answer 6

Base register

Question 7

CX

Answer 7

Counter register

Question 8

DX

Answer 8

Data register

Question 9

The four address registers are separated into 2 categories called:

Answer 9

1. Pointer(s)

2. Index / Indices

Question 10

What are the names of the two pointer address registers?

Answer 10

“Stack pointer” (SP) and “Base pointer” (BP)

Question 11

What are the names of the index address registers?

Answer 11

“Source index” (SI) and “Destination index” (DI)

Question 12

The address registers are used with the segment registers to point to specific addresses in the memory space of the processor. True or False?

Answer 12

True

Question 13

The SP/ “stack pointer” points to the last piece of data placed onto the stack. This last piece is also called the….

Answer 13

“top plate”.

Question 14

Together, the data registers and address registers form the meat and potatoes of a unit called….

Answer 14

the Execution Unit (EU)

Question 15

What are other key units in the Execution Unit?

Answer 15

Flags
Temporary registers
The EU control system
ALU

Question 16

The flags registers determine whether something is on or off. Therefore, they store how much data?

Answer 16

1 bit