Converting rules for signed numbers From unsigned to signed Its msb is changed to the sign bit The number must be a positive Beware the overflow i Key point a positive signed num ber with any code must be the same! Its msb is“0”!Converting rules for signed numbers From unsigned to signed: Its MSB is changed to the sign bit. The number must be a positive ! Beware the overflow ! Key point: A positive signed number with any code must be the same ! Its MSB is “0” !