CB16A

This is a technically-finished 16-bit CPU instruction set and emulator, written for a CS301 project. I didn't have as much time to work on it as I wanted, so as a result it's not as polished or feature-complete as I planned, but it does work.

Instructions

• nop nop: Does nothing
• mov dst, src: Copies data from one register to another
• add dst, src: Adds two registers
• sub dst, src: Subtracts dst register from src register
• push src: Pushes src onto the stack
• pop dst: Pops the value on top of the stack into dst
• jmp dst: Sets the instruction pointer to the literal address dst
• cmp arg0, arg1: Compares arg0 and arg1
• je dst: Jumps to literal value dst if arg0 and arg1 were equal
• jg dst: Jumps if arg0 > arg1
• jge dst: Jumps if arg0 >= arg1
• jl dst: Jumps if arg0 < arg1
• jle dst: Jumps if arg0 <= arg1
• jne dst: Jumps if arg0 != arg1
• set dst, value: Sets register dst to literal value
• save dst, src: Saves register src to memory at literal dst
• load dst, src: Loads memory at literal src into register dst
• out src: Passes the integer at register src to the output function
• mul dst, src: Multiplies src and dst registers

Improvements for CB16B

• Parse and map labels
• Let out print non-integers
• ret instruction