16 bit computer emulator Instruction <Op Code> <Type Code> < Data > <4 bits > < 4 bits > <8 bits> Memory Limitation: 16 addressable spaces Operand Limitations: 2^4 = 16. 0 - 15 Instruction Limitation: 16 bits maximum length, 8 bits minimum length. Registers: 2 Instruction. Address 0 and 1 2 Operand. Address 0 and 1 Op Codes: 0000 - Load <Operand> <Location>. Loads operands into a memory location 0001 - Pop <NULL> <Location>. Pops off the stack after an math operation has occured. 0011 - Add <Location> <Location>. Adds the two operands in the memory locations specified together 1100 - Display <NULL> <Location>. Displays the contents of the memory location 0111 - HALT. Stops the program 1111 - Move <Origin> <Destination>. Moves operands in memory locations 1110 - Remove <NULL> <Location>. Removes an operand from a memory location 1001 - Subtract <Location> <Location>. Subtracts the two operands in the memory locations 1011 - Divide <Location> <Location>. Divides the two operands in the memory locations 1101 - Multiply <Location> <Location>. Multiplies the two operands in the memory locations 0101 - Read Register <Register> <Location>. Reads from either the operand or instrutction register. 1010 - Write Register <Register> <Location>. Writes to either the operand or instruction regsister. 0100 - CONTINUE. Signifies that there is more of the program. Useful for programs that are more than 16 lines. Wipes main memory, registers still retain their information. Type Codes: 0001 - Broken up instruction. Tells the IO to break the instruction down into two 8 bit segments 0011 - Read/write to/from Instruction register 0111 - Read/Write to/from Operand register