Input Output Instructions

The simulator has 16 ports numbered from 00 to 0F. These are connected to simulated, outside-world peripherals.

Assembler	Machine Code	Explanation
IN 07	F0 07	Input from Port 07. F0 is the machine instruction for Input. 07 is the port number.
OUT 01	F1 01	Output to Port 01. F1 is the machine instruction for Output. 01 is the port number.

Port	Description
00	Input from port 00 for simulated keyboard input.
01	Output to port 01 to control the traffic lights.
02	Output to port 02 to control the seven segment displays.
03	Output to port 03 to control the heater. Input from port 03 to sense the thermostat state.
04	Output to port 04 to control the snake in the maze.
05	Output to port 05 to control the stepper motor.
06	Output to port 06 to control the lift.
07	Output to port 07 to make the keyboard visible. Input from port 07 to read the keyboard ASCII code.
08	Output to port 08 to make the numeric keypad visible. Input from port 08 to read from the numeric keypad.
09-0F	Unused