notes for xyz MPG

# this is a generic MPG hal to be used with a 7i76e board
# the MPG hal is designed for Linuxcnc 2.8 and later
# it will not work with older versions of Linuxcnc
#
# this version of MPG will only enable after homing 
# and axis is selected
#
# in the  ini.  file
# Add- HALFILE = mpg_3.hal   
# either under or in place of  HALFILE = custom.hal
#
# be sure to select  -7i76e Mode 2 I/O Card-
# in the -I/O Connector 1- menu at the bottom of the page
# in the -Configuration Page- of PNCconf
# this allows 2 additional encoders to be chosen
# on TB5 while still utillizing a spindle encoder 
# on TB3
#
# use TB5 pins 1 and 2 for encoder 0
# TB5 pins 3 and 4 are for encoder 1 however encoder 1 
# is not utilized for this MPG hal
#
# this hal will utilize 1 MPG jogwheel for independantly controlling
# axis X, Y, Z,   
#
# mux16 is utillized for jog increment selection
#
# TB5 inputs will be utillized with this hal file
#
# TB5 pinout is as follows
# pin 1 A                   encoder 0          
# pin 2 B                   encoder 0  
# pin 3 A                   encoder 1 not used
# pin 4 B                   encoder 1 not used
# pin 5 X axis select       input 20
# pin 6 Y axis select       input 21
# pin 7 Z axis select       input 22
# pin 8 A axis select       input 23 not used
# pin 9 B or C axis select  input 24 not used
# pin 9  inc a select       input 25
# pin 10 inc b select       input 26
# pin 11 inc c select       input 27