DP INPUTBUTTONS

From Quake Wiki

Field definitions:

.float button3;
.float button4;
.float button5;
.float button6;
.float button7;
.float button8;

Set to the state of the +button3, +button4, +button5, +button6, +button7, and +button8 buttons from the client, this does not involve protocol changes (the extra 6 button bits were simply not used).