ADB_READREG
amsg->cmd == ADB_READREG(addr, 0))
msg->reply[2] = autopoll_addr ? ADB_READREG(autopoll_addr, 0) : 0;
ADB_READREG(address, 3));
ADB_READREG(id, 1));
ADB_READREG(id,1));
poll_command = ADB_READREG(poll_addr, 0);
if ((last_cmd & CMD_MASK) == ADB_READREG(0, 0))