IS:112 SOFTWARE & HARDWARE CONCEPTS

UNIT 3 PRACTICE QUESTIONS

 

Describe the functions of offset, general purpose and segment registers. Name at least one of each type.

Know the names and sizes of the parts of the extended general purpose registers.

Describe the functions of the subbusses of the system bus.

Given register contents and instruction(s), "play computer" through exection of the instructions.

Define and describe the addressing modes used in instructions.

 

 

Use the sample memory dump for the following:

CS=2FF8 DS=2100 IP=010E AX=0123 BX=0073

What is the decimal value of the signed word at the offset given in the BX register?

What is the 5-character string beginning at offset 003C?

What is the floating point number beginning at offset 0046 (hex notation)? Is it negative or positive?

What is the first byte of the instruction to be fetched?

 

 

Use the following instructions and register contents:

CS=3F2C DS=2C12 IP=0239

A15000

03065200

A35400

0307

90

What will the IP contain after the third instruction is fetched?

What is the effective address of the last instruction?