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M e d i a P C
M P C - 8 8 9 0
Appendix B Programming the Watchdog Timer
B-3
There are three steps to complete the configuration setup: (1) Enter
the MB PnP Mode; (2) Modify the data of configuration registers;
(3) Exit the MB PnP Mode. Undesired result may occur if the MB
PnP Mode is not exited normally.
(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
Summary of Contents for MPC-8890
Page 8: ...Media PC M P C 8 8 9 0 Chapter 1 General Information 1 1 General Information Chapter 1...
Page 18: ...Media PC M P C 8 8 9 0 Chapter 2 Quick Installation Guide 2 4 Solder Side...
Page 20: ...Media PC M P C 8 8 9 0 Chapter 2 Quick Installation Guide 2 6 Solder Side...
Page 39: ...Media PC M P C 8 8 9 0 Chapter 3 Award BIOS Setup 3 1 Award BIOS Setup Chapter 3...
Page 57: ...Media P C M P C 8 8 9 0 Chapter 4 Driver Installation 4 1 Driver Installation Chapter 4...
Page 61: ...Media PC M P C 8 8 9 0 Appendix A I O Information A 1 I O Information Appendix A...
Page 78: ...Media PC M P C 8 8 9 0 Appendix C CompactFlash Cover Installation Guide C 5 Step 5 Done...