M19 spindle orient

Configuration 5i25 and 7i77 for X Y Z A and spindle control. What is the right way to configure the controls so M19 command could be executed? Spindle has 2048 pulses differential encoder.
Anybody to has HAL or INI files?
LinuxCNC samples ar at no help.

Thank You in advance!

Here is a jpg of a schematic I've done, to try and get orient working. It seems to work, but I expect it could be simplified, I'm still working on it. I'm using a Mesa 7i85S for the spindle encoder, linked to two software encoders.

Why would you use a software encoder if you have a 7i85s?

raglanlittlejohn thanks , but I would like to do it with with standard components for M19 :

M19 Orient Spindle
M19 R- Q- [P-]
R Position to rotate to from 0, valid range is 0-360 degrees
Q Number of seconds to wait until orient completes. If motion.spindle.is_oriented does not become true within Q timeout an error occurs.
P Direction to rotate to position.
0 rotate for smallest angular movement (default)
1 always rotate clockwise (same as M3 direction)
2 always rotate counterclockwise (same as M4 direction)
M19 is cleared by any of M3,M4,M5.
Spindle orientation requires a quadrature encoder with an index to sense the spindle shaft position and direction of rotation.
INI Settings in the [RS274NGC] section.
ORIENT_OFFSET = 0-360 (fixed offset in degrees added to M19 R word)
HAL Pins
motion.spindle-orient-angle (out float) Desired spindle orientation for M19. Value of the M19 R word parameter plus the value of the [RS274NGC]ORIENT_OFFSET ini parameter.
motion.spindle-orient-mode (out s32) Desired spindle rotation mode. Reflects M19 P parameter word, Default = 0
motion.spindle-orient (out bit) Indicates start of spindle orient cycle. Set by M19. Cleared by any of M3,M4,M5. If spindle-orient-fault is not zero during spindle-orient true, the M19 command fails with an error message.
motion.spindle-is-oriented (in bit) Acknowledge pin for spindle-orient. Completes orient cycle. If spindle-orient was true when spindle-is-oriented was asserted, the spindle-orient pin is cleared and the spindle-locked pin is asserted. Also, the spindle-brake pin is asserted.
motion.spindle-orient-fault (in s32) Fault code input for orient cycle. Any value other than zero will cause the orient cycle to abort.
motion.spindle-locked (out bit) Spindle orient complete pin. Cleared by any of M3,M4,M5.

but I do not find how to set a speed (RPM or RPS ) for M19

Todd, I used the software encoders to get two position values, 0 to 1 per rev, and 0 to 360 per rev. this was the only way I could get orient working.

Why not set the encoder scale for the hardware encoder counter for your 360 degrees, then use a scale component on the position output by encoder counter to get your per rev number?