add method

void add(
  1. int opcode
)

Implementation

void add(int opcode) {
  var rx = _rxIndex(opcode);
  registers.v[rx] += registers.v[_ryIndex(opcode)];
  registers.v[0xF] = registers.v[rx] > 0xFF ? 1 : 0;
  registers.v[rx] &= 0xFF;
}