In an 8-bit representation, we can write any number from -128 to 127. The name comes from the fact that a negative number is a two's complement of a positive one. Unsigned notation - a representation that supports only positive values.
How do you find 2s complement of 8-bit number?
Program Explanation
The operand is moved to accumulator from memory location 3000H. Then, its complement is found by using CMA instruction. One is added to accumulator by incrementing it to find its 2's complement. The result is stored at memory location 3001H.
How do you convert a decimal to 8-bit 2's complement?
Convert -72 to an 8-bit, twos complement binary number.
- Convert the magnitude, 72 to binary. The easiest way is to convert it to hex first. 72÷16 = 4 remainder 8, so 7210 = 4816 = 10010002.
- Pad to 8 bits: 01001000.
- Negate the number by inverting the bits and adding 1. ¬ +
