Acer Aspire T100 Service Manual page 65

Checkpoint
14h
15h
16h
17h
18h
19h
1Ah
1Bh
1Ch
1Dh
1Eh
1Fh
20h
21h
22h
23h
24h
25h
26h
27h
28h
29h
2Ah
2Bh
2Ch
2Dh
58
Program chipset default values into chipset. Chipset default values are
MODBINable by OEM customers.
Reserved
Initial onboard clock generator if Early_Init_Onboard_Generator is defined.
See also POST 26h.
Reserved
Detect CPU information including brand, SMI type (Cyrix or Intel) and CPU
level (586 or 686).
Reserved
Reserved
Initial interrupts vector table. If no special specified, all H/W interrupts are
directed to SPURIOUS_INT_HDLR & S/W interrupts to
SPURIOUS_soft_HDLR.
Reserved
Initial EARLY_PM_INIT switch
Reserved
Load keyboard matrix (notebook platform)
Reserved
HPM Initialization (notebook platform)
Reserved
1. Check validity of RTC value:
e.g. a value of 5Ah is an invalid value for RTC minute.
2. Load CMOS settings into BIOS stack. If Smos checksum fails, use
default value instead.
Prepare BIOS resource map for PCI & PnP use. If ESCD is valid, take into
consideration of the ESCD's legacy information.
Early PCI Initialization:
• Enumerate PCI bus number
• Assign memory & I/O resource
• Search for a valid VGA device & VGA BIOS, and put it into C000:0
1. If Early_Init_Onboard_Generator is not defined Onboard clock generator
initialization. Disable respective clock resource to empty PCI & DIMM
slots.
2. Init onboard PWM
3. Init onboard H/W monitor devices
Initialize INT 09 buffer
Reserved
1. Program CPU internal MTRR (P6 & PII) for 0-640K memory address.
2. Initialize the APIC for Pentium class CPU
3. Program early chipset according to CMOS setup. Example: onboard
IDE controller.
4. Measure CPU speed.
Reserved
Invoke Video BIOS
Reserved
1. Initialize double-byte language font (Optional)
2. Put information on screen display, including Award title, CPU type, CPU
speed, full screen logo.
Description
Chapter 4