BIOS POST Checkpoints
E-3
Table E-1
POST Checkpoint List
Checkpoint
Description
80h
•
Set security status
84h
•
KB device initialization
•
Enable KB device
6Ch
•
FDD testing & parameter table setup
Note: The FDD LED should flash once and its head should be positioned
88h
•
HDD testing & parameter table setup
89h
•
Get CPU MUX
Note: This routine is to identify the user-set CPU frequency, not CPU-required frequency
90h
•
Display POST status if necessary
93h
•
Rehook int1c for quiet boot
94h
•
Initialize I/O ROM
A4h
•
Initialize security feature
A8h
•
Setup SMI parameters
A0h
•
Initialize Timer counter for DOS use
ACh
•
Enable NMI
•
Enable parity checking
•
Set video mode
B0h
•
Power-on password checking
•
Display configuration table
•
Clear memory buffer used for POST
•
Select boot device
Summary of Contents for 390 Series
Page 15: ...System Introduction 1 3 Figure 1 2 PCB No 96183 1A Mainboard Layout Bottom ...
Page 96: ...2 50 Service Guide 2 3 3 Pin Configuration Figure 2 4 FDC37C67 TQFP Pin Diagram ...
Page 97: ...Major Chips Description 2 51 Figure 2 5 FDC37C67 QFP Pin Diagram ...
Page 102: ...2 56 Service Guide 2 3 6 Block Diagram Figure 2 6 FDC37C67 Block Diagram ...
Page 126: ...2 80 Service Guide 2 5 4 1 Functional Block Diagram Figure 2 10 M38813 Block Diagram ...
Page 128: ...2 82 Service Guide 2 6 2 Pin Diagram Figure 2 11 YMF715 Block Diagram ...
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