Logitech 3D MOUSE & HEAD TRACKER Technical Reference Manual page 66

Chapter 6
54
Send Standard Configuration (*?)
The *? command causes the control unit to transmit a four-byte report
to the host computer (see Figure 6-13). This report contains information
about the firmware version, report bit rate, bit rate capabilities, device
type, number of buttons, protocol, and current mouse configuration.
Figure 6-13. Send Standard Configuration Four-Byte Report Format
Name Bit6
Byte 1 1
Byte 2 0
Byte 3 0
Byte 4 0
Where in Table 6-13,
V5...V0 = Firmware Version Index [000001] (See Table 6-6 for a
description of the Firmware Version Index)
RBR = Report Bit Rate before receiving a command [0]
0 = The device was in 1200 bit/second mode.
1 = The device was in 9600 bit/second mode.
BRC = Bit Rate Capabilities [0]
0 = The device can transmit reports at 1200 bit/second
1 = The device can transmit reports at 1200 and 9600
EXT = Extension to Command set [1]
0 = There is extension to the command set
1 = The command set is extended with the "*!"
Bit5 Bit4 Bit3
V5 V4 V3
RBR BRC EXT
B2 B1 B0
RES RES RES
[not currently supported]
only.
bit/second [not currently supported]
command.
Bit2 Bit1 Bit0
V2 V1 V0
DT2 DT1 DT0
P2 P1 P0
RES RES RES