Difference between revisions of "83Plus:BCALLs:80ED"

Latest revision as of 09:17, 11 March 2007

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-[[Category:83Plus:BCALLs:By Name|ControlCmdFailed]]
+#REDIRECT [[83Plus:BCALLs:8111]]
-[[Category:83Plus:BCALLs:By Address|80ED - ControlCmdFailed]]
-== Synopsis ==
-'''Unofficial Name:''' ControlCmdFailed
-'''BCALL Address:''' 80ED
-Checks for success/failure on a USB control request.
-=== Inputs ===
-* None
-=== Outputs ===
-* C set if NAK or Stall
-=== Destroys ===
-* A
-== Comments ==
-This BCALL outputs 0 to port 8Eh and checks bits 2 and 4 of port 91h. If either are set, this function returns carry set.
-== Example ==
- <nowiki>B_CALL ControlCmdFailed
-jr c,commandFailed</nowiki>