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BIOS
- 46 -
62h
63h
64h
65h
66h
67h
68h
69h
6Ah
6Bh
6Ch
6Dh
6Eh
6Fh
70h
71h
72h
73h
74h
75h
76h
77h
78h
79h
7Ah
7Bh
7Ch
7Dh
7Eh
7Fh
Reserved
Reserved
Reserved
Initialize PS/2 mouse
Reserved
Prepare memory size information for function call: INT 15h ax=E820h
Reserved
Turn on L2 cache
Reserved
Program chipset registers according to items described in Setup &
Auto-Configuration table
Reserved
Assign resources to all ISA PnP devices; Auto assign ports to
onboard COM ports if the corresponding item in Setup is set to
"AUTO"
Reserved
Initialize floppy controller; Setup floppy related fields in 40:hardware
Reserved
Reserved
Reserved
Enter AWDFLASH.EXE if: AWDFLASH.EXE is found in floppy dive
and ALT+F2 is pressed
Reserved
Detect and install all IDE devices: HDD, LS120, ZIP, CDROM...
Reserved
Detect serial ports and parallel ports
Reserved
Reserved
Detect and install coprocessor
Reserved
Reserved
Reserved
Reserved
Switch back to text mod if full screen logo is supported: if errors
occur, report errors & wait for keys, if no errors occur or F1 key is
pressed continue - Clear EPA or customization logo
BIOS
- 47 -
80h
81h
82h
83h
84h
85h
86h
87h
88h
89h
90h
91h
92h
93h
94h
95h
96h
FFh
Reserved
Reserved
Call chipset power management hook: Recover the text fond usedby
EPA logo (not for full screen logo), If password is set, ask for
password
Save all data in stack back to CMOS
Initialize ISA PnP boot devices
Final USB initialization; NET PC: Build SYSID structure; Switch
screen back to text mode; Set up ACPI table at top of memory;
Invoke ISA adapter ROM's; Assign IRQ's to PCI devices; Initialize
APM; Clear noise of IRQ's
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Read HDD boot sector information for Trend Anti-Virus code
Enable L2 cache; Program boot up speed; Chipset final initialization;
Power management final initialization; Clear screen and display
summary table; Program K^ write allocation; Program P6 class write
combining
Program daylight saving; Update keyboard LED and typematic rate
Build MP table; Build and update ESCD; Set CMOS century to 20h
or 19h; Load CMOS time into DOS timer tick; Build MSIRQ routing
table
Boot attempt (INT 19h)