isMiscellaneous_(b1, b2) {
    // For Miscellaneous Control Codes, the bytes take the following form:
    // b1 -> |0|0|0|1|C|1|0|F|
    // b2 -> |0|0|1|0|X|X|X|X|
    return ((b1 & 0xf6) === 0x14) && ((b2 & 0xf0) === 0x20);
  }
Checks if this is a Miscellaneous control code.
@param {number} b1 Byte 1.
@param {number} b2 Byte 2.
@return {boolean}
@private