Difference between revisions of "83Plus:BCALLs:4FF0"

Latest revision as of 11:08, 10 July 2006

Unofficial Name: RunGraphingHook

BCALL Address: 4FF0

Checks the first byte of the block for the Graph 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 Graph 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|RunGraphingHook]]
-<nowiki>_RunGraphingHook    EQU 4FF0h   ;Undocumented 1.13 MC
+[[Category:83Plus:BCALLs:By Name:Hook|RunGraphingHook]]
-    ;Checks the byte @ the address @ graphingHookPtr.
+[[Category:83Plus:BCALLs:By Address|4FF0 - RunGraphingHook]]
-    ;If the byte is 83, it runs the hook. If the byte
+== Synopsis ==
-    ;is different, it resets the graphing hook flag.
+'''Unofficial Name:''' RunGraphingHook
-    ;Inputs:     graphingHookPtr     must be setup correctly
-    ;Outputs:    HL          Int16   points to start of hook
+'''BCALL Address:''' 4FF0
-    ;            F           Int8    F is 6A if not run</nowiki>
+Checks the first byte of the block for the [[83Plus:Hooks:9B94|Graph 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 Graph 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 ===
+*Depends on hook, might destroy everything.
+== Comments ==
+This BCALL is known to be present in OS 1.13, and is undocumented.
+== Credits and Contributions ==
+*Michael Cimino (probably)