| 1. | Where a program is being executed in an 8085 byte Instruction microprocessor, its program counter contains ? | |
|
The number of instructions in the current program that have already been executed
|
||
|
The total number of instructions in the program being executed
|
||
|
The memory address of the instruction that is being currently executed
|
||
|
The memory address of the instruction that is to be executed next
|
||
View Answer
Discuss in Forum
Report Question| 2. | What is the magnitude of data stored by a latch ? | |
|
8 bit of data
|
||
|
1 bit of data
|
||
|
4 bit of data
|
||
|
16 bit of data
|
||
| 3. | 8088 microprocessor differs with 8086 microprocessor in ? | |
|
Data width on the output
|
||
|
Address capability
|
||
|
Support of coprocessor
|
||
|
Support of MAX / MIN mode
|
||
| 4. | What are software interrupts ? | |
|
RST 0 - 7
|
||
|
RST 5.5 - 7.5
|
||
|
INTR, TRAP
|
||
|
RST 6.5
|
||
| 5. | Which of the following is hardware interrupts ? | |
|
RST 5.5
|
||
|
RST 6.5, RST 7.5
|
||
|
INTR, TRAP
|
||
|
All
|
||
| 6. | In 8085, the pairing of registers B, C, D, E, H, L is ? | |
|
B - C, D - E, H - L
|
||
|
B - D, C - E, H - L
|
||
|
B - C, D - L, H - E
|
||
|
B - H, D - E, C - L
|
||
| 7. | The chip 8257 is a ? | |
|
programmable interrupt controller
|
||
|
programmable DMA controller
|
||
|
programmable peripheral interface
|
||
|
none of the above
|
||
| 8. | In 8085 the instruction MOV A, M is an example of ? | |
|
Direct addressing
|
||
|
Immediate addressing
|
||
|
Register addressing
|
||
|
Register indirect addressing
|
||
| 9. | When a peripheral device is not ready for data transfer it will send to the microprocessor a ? | |
|
low READY bit
|
||
|
high READY bit
|
||
|
low or high READY bit depending on whether input or output is activated
|
||
|
none of the above
|
||
| 10. | In 8085 the term 'absolute addressing' means ? | |
|
Direct addressing
|
||
|
Immediate addressing
|
||
|
Register addressing
|
||
|
Register indirect addressing
|
||