IBM PC Mouse

Commands

E6 - Set Scaling 1:1

E7 - Set Scaling 2:1

F3 - Set Sampling Rate

Set mouse sample rate in Hz.

Param: {10d, 20d, 40d, 60d, 80d, 100d, 200d}

E8 - Set Resolution

This command is followed by a byte indicating the resolution (0, 1, 2, 3: 1, 2, 4, 8 units per mm, respectively).

Param: {00, 01, 02, 03}

E9 - Read Status

Responds with 3-byte status report.

Byte1:

Bit	Description
Bit 7	0 = Always (Reserved for future use)
Bit 6	0 = Stream mode / 1 = Remote mode
Bit 5	0 = Disable / 1 = Enable
Bit 4	0 = Scaling 1:1 / 1 = Scaling 2:1
Bit 3	0 = Always (Reserved for future use)
Bit 2	1 = Left button depressed (TrackPoint system or external device)
Bit 1	1 = Middle button depressed (TrackPoint system or external device)
Bit 0	1 = Right button depressed (TrackPoint system or external device)

Byte 2: Current resolution setting (Same format as second byte of ”E8” command)

Byte 3: Current sampling rate (Same format as second byte of ”F3” command)

Mouse Data

/* Data format:
 * byte|7       6       5       4       3       2       1       0
 * ----+--------------------------------------------------------------
 *    0|Yovflw  Xovflw  Ysign   Xsign   1       Middle  Right   Left
 *    1|                    X movement
 *    2|                    Y movement
 */