MSI IM-Q35 Series User Manual page 67

IM-Q35 Mainboard
39
3A
3B
3C
40
52
60
75
78
7C
84
85
87
8C
8D
8E
90
A1
A2
A4
A7
A9
AA
AB
AC
B1
00
4-6
Initializes D MAC -1 & DMAC-2.
Initialize RTC date/tim e.
Test for total mem ory installed in the system. Also, Check for DEL or ESC
keys to limit memor y test. Display total memory in the sys tem.
Mid POST initialization of chipset registers.
D et ect differ ent devices (Parallel ports, serial ports, and coprocessor in
CPU, ... etc.) successfully installed in the sys tem and update the BDA,
EBDA...etc.
Updates C MO S m emory size from memory found in m emory test.
Allocates m emory for Extended BIOS Data Area from base memory.
Pr ogr amming the m emory hole or any kind of implem entation that needs
an adjustment in system RAM size if needed.
Initializes NU M-LOCK status and programs the KBD typem atic r ate.
Initialize Int-13 and prepare for IPL detection.
Initializes IPL devices controlled by BIOS and option ROMs.
Generat e and write contents of ESCD in NVRam.
Log errors encountered during POST.
Display errors to the us er and gets the user response for error.
Execute BIOS setup if needed / requested. Check boot passw ord if
inst alled.
Late POST initialization of chipset registers.
Build ACPI tables (if ACPI is support ed)
Pr ogr am t he peripheral parameters. Enable/Dis able NMI as s elected
Initialization of system m anagement interr upt by invoking all handlers.
Please note this checkpoint comes r ight after checkpoint 20h
Clean-up work needed before booting to OS.
Takes care of r untime image preparation for different BIOS modules. Fill
the free area in F000h segment with 0FFh. Initializes the Microsoft IRQ
R outing Table. Prepares the runtim e language module. Disables the
system configuration display if needed.
Initialize runt ime language module. Display boot option popup m enu.
Displays the system c onfiguration screen if enabled. Initialize the CPU 's
before boot, which includes the programming of the MTRR's.
W ait for user input at c onfig display if needed.
Uninstall POST INT 1Ch vector and INT09h vec tor.
Pr epare BBS for Int 19 boot. Init MP tables.
End of POST initialization of chipset regist ers. D e- initializes the AD M
m odule.
Save system context for ACPI. Prepare CPU for OS boot including final
MTRR values.
Pass es cont rol to OS Loader (typically INT19h).