AppendixEP-MVP3C/2
A-7
2. Program all onboard super I/O chips (if any) including
COM ports, LPT ports, FDD port ... according to setup value.
33-3B Reserved.
3C Set flag to allow users to enter CMOS Setup Utility.
3D 1. Initialize Keyboard.
2. Install PS2 mouse.
3E Try to turn on Level 2 cache.
Note: Some chipset may need to turn on the L2 cache in
this stage.
But usually, the cache is turn on later in POST 61h.
3F-40 Reserved.
BF 1. Program the rest of the Chipset's value according to Setup.
(Later Setup Value Program)
41 2. If auto-configuration is enabled, program the chipset with
pre-defined Values.
4 2 Initialize floppy disk drive controller.
4 3 Initialize Hard drive controller.
45 If it is a PnP BIOS, initialize serial & parallel ports.
4 4 Reserved.
4 5 Initialize math coprocessor.
46-4D Reserved.
4E If there is any error detected (such as video, kb...), show all
error messages on the screen & wait for user to press <F1>
key.
4F 1. If password is needed, ask for password.
2. Clear the Energy Star Logo. (Green BIOS only)
50 Write all CMOS values currently in the BIOS stack area
back into the CMOS.
5 1 Reserved.
52 1. Initialize all ISA ROMs.
2. Later PCI initializations. (PCI BIOS only)
- assign IRQ to PCI devices.
- initialize all PCI ROMs.
3. PnP Initialzations. (PnP BIOS only)
- assign IO, Memory, IRQ & DMA to PnP ISA devices.
- initialize all PnP ISA ROMs.
4. Program shadows RAM according to Setup settings.