LoadProgTrap loads a program into memory Input: Memory address in register 0.

NewCPU returns a new CPU object.

NewRegister is the constructor for a register.

NewStack creates a new stack object.

ReadStringTrap reads a string from the console Input: None Output: Sets register 0 with the user-provided string.

RemoveNewLineTrap removes any trailing newline from the string in #0 Input: The string operate upon in #0.

StrLenTrap returns the length of a string.

TrapNOP is the default trap-function for any trap IDs that haven't explicitly been setup.

TRAPS is an array of our trap-functions.

CPU is our virtual machine state.

Flags holds the CPU flags - of which we only have one.

IntegerObject is an object holding an integer-value.

Register holds the contents of a single register, as an object.

Stack holds return-addresses when the `call` operation is being completed.

StringObject is an object holding a string-value.

Object is the interface for something we store in a register.

TrapFunction is the signature for a function that is available as a trap.