=> R0 = 34 (Notification of changed directory)
R1 = pointer to name
R2 = changed directory
R6 = pointer to special field, or 0 if not present
This call informs a filing system when a directory has changed, which may help a filing system to choose which directories to cache.
FSEntry_Func 34 directory codes
# Meaning
0 CSD Current directory
1 PSD Previously selected directory
2 URD User root directory
3 Lib Library
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