Question

Microprocessor 8086 material.

Choose True or False

1-Multiplexing operation is used to reduce the number of pins in 8086Mp. *
True
False

2-In 8086Mp, the only way to access the flags register bits is by using the instructions (PUSHF) and (POPF). *
True
False

3-CBW and CWD can be used with both signed and unsigned numbers. *
False
True

4-In order to set any bit in a register, AND instruction is used, while to clear any bit in a register, OR instruction is used. *
True
False

5-There are 20 address lines and 8 data lines in 8086MP. *
False
Ture

Answer 1

1. Multiplexing operation is used to reduce the number of pins in 8086Mp.---True.

2. In 8086Mp, the only way to access the flags register bits is by using the instructions (PUSHF) and (POPF)...False.

Because  PUSHF-Used to copy the flag register at the top of the stack and POPF-Used to copy a word at the top of the stack to the flag register. Note this instructions are not access bit.

3. CBW and CWD can be used with both signed and unsigned numbers......False,

Because CBW-Convert Signed Byte to Word & CWD-convert Signed Word to Double Word instructions.

4. In order to set any bit in a register, AND instruction is used, while to clear any bit in a register, OR instruction is used....False , because AND-Used for adding each bit in a byte/word with the corresponding bit in another byte/word and OR-Used to multiply each bit in a byte/word with the corresponding bit in another byte/word.

5. There are 20 address lines and 8 data lines in 8086MP.....False , because in 8086 have 20 address lines and and 16 data lines.