If the port A, B, C address of 8255 IC are 38H, 3AH, 3CH and its are configured as port A is an output port, both ports B and C are input ports, and all three ports are set up for mode 0 operation....

Extracted text: If the port A, B, C address of 8255 IC are 38H, 3AH, 3CH and its are configured as port A is an output port, both ports B and C are input ports, and all three ports are set up for mode 0 operation. Construct a program that will input the data at ports B and C, find the difference (port C) - (port B), and output this difference to port A.