public RegisterFile Pop(RegisterFile registerFile, out byte value)
{
if (registerFile.StackPointer >= TopOfStack)
{
throw new StackUnderflowException();
}
value = Memory.Load(registerFile.StackPointer);
return(registerFile.WithStackPointer(sp => (ushort)(sp + 1)));
}
public RegisterFile Push(RegisterFile registerFile, byte value)
{
Memory.Store(registerFile.StackPointer, value);
return(registerFile.WithStackPointer(sp => (ushort)(sp - 1)));
}
