The first byte is the axis identifier, because there are two micro-controllers in the MCMTII, one for the right-ascension and one for the declination axis. axis_id is `E0' for alpha axis (right ascension), `E1' for delta axis (declination). In the request and response fields of the tables below, values or identifiers represent bytes, and they are separated by commas. PIC is big-endian; most data listed in the requests or replies 2- (or more) byte long must be converted if the computer is little-endian (Intel). Numbers below are in hexadecimal, characters enclosed in quotes mean that's the ASCII value, as in many programming languages. Comments are between parentheses.