Write a maximum of two instructions to clear, set and complement some bits in the AL register

Question

You are required to write a maximum of two instructions in assembly to do the following:

1. Clear bits 0 and 7 of register AL, i.e. make them 0
2. Set bits 3 and 4 of register AL, i.e. make them 1.
3. Complement bits 1 and 5 of register AL.
4. Keep all other bits in the register AL as is without changing their values.

Answer 1

The trick here is to do the following:

1. use an OR instruction to set bits 0, 3, 4 and 7

2. use an XOR instruction to complement bits 0, 1, 5 and 7

Note that bits 0 and 7 first get set in (1) and then cleared in (2).

I'll leave the actual asm instructions to you, since this is your homework, after all.