Onyx ONYX-122, Руководство пользователя

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S li m M e di cal P a n el P C O N Y X - 1 2 2
Appendix A Miscellaneous A-3
(1) Enter the MB PnP Mode
To enter the MB PnP Mode, four special I/O write operations are
to be performed during Wait for Key state. To ensure the initial
state of the key-check logic, it is necessary to perform four write
opera-tions to the Special Address port (2EH). Two different enter
keys are provided to select configuration ports (2Eh/2Fh) of the
next
step
(2) Modify the Data of the Registers
All configuration registers can be accessed after entering the MB
PnP Mode. Before accessing a selected register, the content of
Index 07h must be changed to the LDN to which the register
belongs, except some Global registers.
(3) Exit the MB PnP Mode
Set bit 1 of the configure control register (Index=02h) to 1 to exit
the MB PnP Mode.
WatchDog Timer Configuration Registers
Configure Control (Index=02h)
This register is writing only. Its values are not sticky; that is to say,