I have a patch that updates the Logitech PS/2++ protocol to support
their mice with up to 10 buttons (currently they're only using 8 on the
MX500 and MX700). The PS/2++ protocol now uses 6 bits to identify a
packet instead of 4 as before. Apparently, there's a touchpad protocol
that also used it (more on that later).
Updated PS/2++ protocol:
The identifier type bits are now 6 bits instead of 4:
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
byte1 1 1 t5 t4 1 M R L Button data
byte2 t3 t2 t1 t0 d2 d1 1 0 X data
byte3 d8 d7 d6 d5 d4 d3 d2 d1 Y data
note: bit7, byte1 is 1 for external devices, 0 for internal ones
name t description
P0 - 0x0C - attached device type (corded mouse or receiver)
P1 - 0x0D - roller and buttons 4 & 5 info
P2 - 0x0E - buttons 4,5,6,7,8,9,10 info
... (other packet types aren't used/useful to X)
This is the new P2 packet:
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
byte1 1 1 0 0 1 M R L
byte2 1 1 1 0 B5 B4 1 0
byte3 0 B10 B9 B8 B7 B6 B5 B4
B6 = task switch button
B7 = SMS up button
B8 = SMS down button
B9/10 are not yet used in current mice
There are also 2 feature additions (not PS/2++):
Option SmartScroll (boolean)
in the config enables/disables auto-scrolling on the SMSup/down buttons
on the MX500/700.
Also, 800 cpi resolution is now supported on mice that support it in
hardware (Dual Optical, MX300/500/700, ...). Hopefully this will make
high sensitivity users happy :)
Here's my patch:
http://yhbt.net/normalperson/files/xfree86/4.3.0_logitech_ps2.patch
The downside of this patch is that some touchpad users that specify
MouseManPlusPS/2 will probably need a new protocol defined for them.
--
Eric Wong
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