BIOS POST Checkpoints C-3
Table C-1 POST Checkpoint List
Checkpoint Description
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