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

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[[Category:83Plus:BCALLs:By Name|ControlCmdFailed]]
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#REDIRECT [[83Plus:BCALLs:8111]]
[[Category:83Plus:BCALLs:By Address|80ED - ControlCmdFailed]]
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== Synopsis ==
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'''Unofficial Name:''' ControlCmdFailed
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'''BCALL Address:''' 80ED
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Checks for success/failure on a USB control request.
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=== Inputs ===
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* None
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=== Outputs ===
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* C set if NAK or Stall
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=== Destroys ===
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* A
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== Comments ==
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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.
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== Example ==
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<nowiki>B_CALL ControlCmdFailed
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jr c,commandFailed</nowiki>
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Latest revision as of 09:17, 11 March 2007