Updated GB_read_memory (markdown)

GB_read_memory.md

@@ -14,7 +14,7 @@ Performs a memory read on a 16-bit address on the emulator instance, as if it wa
 
 ## Notes
 
-To read data outside of a currently mapped bank, you can use [[GB_get_direct_access]].
+To read data outside of a currently mapped bank, or to read from a memory region that might not be currently readable (e.g. VRAM during mode 3), you can use [[GB_get_direct_access]].
 
 Because this functions goes through the same routines used by a CPU memory read, it will trigger any side effect caused by a memory read, including, for example, OAM corruption. If you wish you avoid this behavior, you can use either [[GB_safe_read_memory]] or [[GB_get_direct_access]].