Problem
Write a PIC18F assembly language program at address 0x70 to insert a '1' at bit 2 of WREG without changing the other bits if WREG contains a negative number. On the other hand, insert a 'O' at bit 2 of WREG without changing the other bits if WREG contains a positive number. Assume that the 8-bit signed number is already loaded into WREG.