How to Set, Reset, and Complement Bits in Memory Location

23 Nov 2021

How can we set 0, bi, reset b2, b3, and complement b6, b7 for the content of memory location [2800) and store the result in [2801]?

What are the steps to achieve this task?

To set 0, bi, reset b2, b3, and complement b6, b7 for the content of memory location [2800], you can follow these steps:

To achieve the desired bit manipulation in memory locations, you need to follow a specific set of steps:

Loading the content of memory location [2800] into a register: This step involves fetching the value stored in memory location [2800] and loading it into a register using appropriate instructions in your programming language.
Setting the 0th bit of the register to 0: Utilize bitwise operations like AND or OR to set the 0th bit of the register to 0. For example, you can use the AND operation with a bitmask that has all bits set to 1 except the 0th bit.
Setting the ith bit of the register to 1: Use bitwise operations to set the ith bit of the register to 1 by applying the OR operation with a bitmask that represents the desired bit position.
Resetting the 2nd and 3rd bits of the register to 0: Reset these specific bits in the register by performing bitwise operations (e.g., AND) with a corresponding bitmask.
Complementing the 6th and 7th bits of the register: Apply bitwise operations, like XOR, with the appropriate bitmask to toggle the states of the 6th and 7th bits in the register.
Storing the modified value back into memory location [2801]: After all manipulations are completed, store the updated value from the register into memory location [2801] using the necessary programming language instructions.