ROHS EmETXe-i9652 User Manual page 65

BIOS
Initializes different devices through DIM. See DIM Code
38 Checkpoints section of document for more information. USB
controllers are initialized at this point.
39 Initializes DMAC-1 & DMAC-2.
3A Initialize RTC date/time.
Test for total memory installed in the system. Also, Check for
3B DEL or ESC keys to limit memory test. Display total memory
in the system.
3C Mid POST initialization of chipset registers.
Detect different devices (Parallel ports, serial ports, and
40 coprocessor in CPU, ... etc.) successfully installed in the
system and update the BDA, EBDA...etc.
Updates CMOS memory size from memory found in memory
test. Allocates memory for Extended BIOS Data Area from
52 base memory. Programming the memory hole or any kind of
implementation that needs an adjustment in system RAM size
if needed.
Initializes NUM-LOCK status and programs the KBD
60
typematic rate.
75 Initialize Int-13 and prepare for IPL detection.
78 Initializes IPL devices controlled by BIOS and option ROMs.
7C Generate and write contents of ESCD in NVRam.
84 Log errors encountered during POST.
Display errors to the user and gets the user response for
85
error.
Execute BIOS setup if needed / requested. Check boot
87
password if installed.
8C Late POST initialization of chipset registers.
8D Build ACPI tables (if ACPI is supported)
Program the peripheral parameters. Enable/Disable NMI as
8E
selected
Initialization of system management interrupt by invoking
90 all handlers. Please note this checkpoint comes right after
checkpoint 20h
A1 Clean-up work needed before booting to OS.
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