Lab Quiz 5

1.
In the Wombat 1 machine: 1. mar and mbr are connected directly to 2. A value from memory is placed in this register by the FETCH sequence and DECODED as an instruction. 3. Data going to or from memory always goes via this register 4. This register is often used to hold a program address but does not usually contain the address of the instruction being executed. 5. When the "RAM Main" is being read from or written to, the address used will be the one held in this register 6. The Wombat 1 "add" instruction always places its answer in this register a. mar b. pc c. RAM Main d. mbr e. ir f. acc
1 points

Correct Answer:
1C,2E,3D,4B,5A,6F

2.
If the instruction at address 0 is: store 0
Then when executed, this instruction will be overwritten with whatever is in acc
1 points

A)
True

B)
False

3. Wombat 1 is a 16 bit machine
1 points

A)
True

B)
False

4. On Wombat 1 it is possible for ir to contain the same bit pattern as the acc
1 points

A)
True

B)
False

5.
In Wombat 1 assembly language .data is a/an: 1 points

A) illegal instruction B) assembler pseudo instruction C) assembler virtual instruction D) machine code instruction

6.
Assembler ______ have a ______ to ______ relationship with __________________ a. memory b. instructions c. one d. machine e. mnemonics f. one g. two h. code i. three j. registers k. sequences l. filters m. ram
1 points

Correct Answer:
E,C,F,D,H,B

7.
How many op codes can a machine have if op codes are allowed 5 bits? 1 points

A)
32

B)
(16