Bits 0, 1, 2, 5, 6, and 7 of DIR_NTRes (0x0c) are not commonly used by any modern OS and thus those could be utilized for adding more mode bits:
- 0:
S_IRUSR
- 1:
S_IRGRP
- 2:
S_IWGRP
- 5:
S_IXGRP
- 6:
S_IROTH
- 7:
S_IWOTH
x and s bits are not very important in Zeke so those don't necessarily need support or they could be mapped elsewhere.