Dear zwchen,
The "LH79520 Card Engine IO Controller Interface Specification" doesn't contain any information about LED "status0" because it doesn't control the LED. Rather it is directly connected to the processor.
First refer to the application board schematics and find LED STATUS 0. Trace the net (uP_STATUS_1) through the schematics to the card engine connector. Now switch to the card engine schematics. Continue following the net to its source (net ), which is to the processor,
port B1 (page 10 of card engine schematic). That is your interface.
Best Regards,
Moderator
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