diff --git a/GB_load_isx.md b/GB_load_isx.md
index 08162c2..38b855c 100644
--- a/GB_load_isx.md
+++ b/GB_load_isx.md
@@ -6,8 +6,19 @@ In `gb.h`
 
 ## Description
 
-TBD
+Loads ROM data and symbols from an ISX file into an emulator instance. Returns 0 on success, a positive `errno` value on a POSIX failure, and `-1` on other failures.
+
+In case of a failure, an error message will also be output to the [[log|GB_set_log_callback]]. Warning messages may be output to the [[log|GB_set_log_callback]] upon success.
 
 ## Thread Safety
 
 `GB_load_isx` must not be called if the instance is being run in another thread, but may be called from the current one (via a callback).
+
+## Notes
+
+`GB_load_isx` will not remove existing symbols from the emulator instance. You may want to call [[GB_debugger_clear_symbols]] before calling this function if the emulator instance already has symbols for a previously loaded ROM.
+
+## See Also 
+
+* [[GB_load_rom]]
+* [[GB_load_gbs]]