Difference between revisions of "83Plus:BCALLs:4FF9"

Latest revision as of 12:25, 6 February 2008

Unofficial Name: RunTracerHook

BCALL Address: 4FF9

Checks the first byte of the block for the Trace Hook. If the byte is 83, the hook is run. Otherwise, the active flag for the hook is set to zero.

The block for the Trace Hook must be set up correctly.

This BCALL is known to be present in OS 1.13, and is undocumented.

@@ Line 1: / Line 1: @@
-{{Wikify}}
+[[Category:83Plus:BCALLs:By Name|RunTracerHook]]
-_RunTracerHook      EQU 4FF9h   ;Undocumented 1.13
+[[Category:83Plus:BCALLs:By Name:Hook|RunTracerHook]]
-    ;Checks the byte @ the address @ tracerHookPtr.
+[[Category:83Plus:BCALLs:By Address|4FF9 - RunTracerHook]]
-    ;If the byte is 83, it runs the hook. If the byte
-    ;is different, it resets the tracer hook flag.
-    ;Inputs:     tracerHookPtr       must be setup correctly
-    ;Outputs:    HL          Int16   points to start of hook
-    ;            F           Int8    F is 6A if not run
-submitted by Michael Cimino
+== Synopsis ==
+'''Unofficial Name:''' RunTracerHook
-btw, sorry about not looking up what the actual value of the hook ptr is
+'''BCALL Address:''' 4FF9
+Checks the first byte of the block for the [[83Plus:Hooks:9BA8|Trace Hook]].
+If the byte is 83, the hook is run.  Otherwise, the active flag for the hook
+is set to zero.
+=== Inputs ===
+The block for the Trace Hook must be set up correctly.
+=== Outputs ===
+*HL points to the start of the hook.
+*F is 6A if the hook was not run.
+=== Destroys ===
+*A
+== Comments ==
+This BCALL is known to be present in OS 1.13, and is undocumented.
+== Credits and Contributions ==
+*Michael Cimino