protech ProX-1635LF - Page 99

Appendix C Trouble Shooting
Page: C-10
Prox-1635LF USER
′ S MANUAL
17h :
Reserved
18h :
Detect CPU information including brand, SMI type (Cyrix or Intel)
and CPU level (586 or 686).
19h :
Reserved
1Ah
:
Reserved
1Bh
:
Initial interrupts vector table. If no special specified, all H/W
interrupts are directed to SPURIOUS_INIT_HDLR & S/W
interrupts to SPURIOUS_soft_HDLR.
1Ch
:
Reserved
1Dh
:
Initial EARLY_PM_INIT switch
1Eh
:
Reserved
1Fh
:
Load keyboard matrix (notebook platform)
20h
:
Reserved
21h
:
HPM initialization (notebook platform)
22h
:
Reserved
23h
:
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 CMOS checksum
fails, use default value instead.
3. Prepare BIOS resource map for PCI & PnP use. If ESCD is
valid, take into consideration of the ESCD’s legacy information.
4. Onboard clock generator initialization. Disable respective
clock resource to empty PCI & DIMM slots.
5. 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.