|R1||Pointer to secondary module base of temporary filing system|
|R2||Pointer to private word of temporary filing system|
The purpose of this call is to read the location of the secondary module for the temporary filing system.
If there is no temporary filing system this call will return values for the current filing system. If there is no current filing system, or no secondary module R1=0, R2 is undefined.
The primary module values can be read with OS_FSControl 20.