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I add pci-e to lpt controller in PC.
Then linuxcnc was started and I checked in / out ports in Hal monitor.

Not sure what that issue is, the "cannot gain I/O privileges" is not related to index at all

A very basic bit of hal code for a 7I76E MPG would be:

net mpg-counts  hm2_7i76e.0.7i76.0.0.enc0.count 
net mpg-counts  axis.x.jog-counts
net mpg-counts  axis.y.jog-counts
net mpg-counts  axis.z.jog-counts
net x-jog-enable hm2_7i76e.0.7i76.0.0.input-07 axis.x.jog-enable
net y-jog-enable hm2_7i76e.0.7i76.0.0.input-08 axis.y.jog-enable
net z-jog-enable hm2_7i76e.0.7i76.0.0.input-09 axis.z.jog-enable

loadrt mux4
addf mux4.0 servo thread
net jog-inc0 hm2_7i76e.0.7i76.0.0.input-10  mux4.0.sel0
net jog-inc1 hm2_7i76e.0.7i76.0.0.input-11  mux4.0.sel1
setp mux4.0.in0 0.0001
setp mux4.0.in1 0.0010
setp mux4.0.in2 0.0100
setp mux4.0.in3 0.1000
net jog-scale mux4.0.out
net jog-scale axis.x.jog-scale
net jog-scale axis.y.jog-scale
net jog-scale axis.z.jog-scale

Notes:

This is for axis rather than for joints so will only work after homing
(a minor change is needed to jog before and after homing)

The I/O pins and jog increments are arbitrary

The mux4 select bits are a binary code 00,01,10,11 to select the jog increment.
This can usually be arranged with a wafer switch but can be redone for linear select
or button press to select the increments.