010xxx - math functions
10000 ----- random (math.pvvs)
10001 ----- absolute value (math.pvvs)
- 011xxx - unassigned
+ 011xxx - heap functions
+ 11000 ----- memset (heap.pvvs)
+ 11001 ----- memcpy (heap.pvvs)
+ 11010 ----- memrand (heap.pvvs)
+ 11011 ----- memcmp (heap.pvvs)
100xxx - unassigned
101xxx - unassigned
- 110xxx - unassigned
- 111xxx - conversion functions
+ 110xxx - conversion functions
+ 111xxx - debug functions
+ 111000 ----- dump heap (debug.pvvs)
1xxxxxx - reserved for less common entry points
1000000 ----- print sign of number (stdio.pvvs)
1000001 ----- print magnitude of number (stdio.pvvs)