Acer G310 - Altos - 512 MB RAM, Service Manual

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Chapter 4 66
37 Displaying sign-on message, CPU information, setup key message, and
any OEM specific information.
38 Initializes different devices through DIM.
39 Initializes DMAC-1 & DMAC-2
3A Initializes RTC date/time
3B Test for total memory installed in the system. Also, check for DEL or ESC keys
to limit memory test. Display total memory in the system.
3C Mid POST initialization of chipset registers.
40 Detect different devices (Parallel ports, serial ports, and coprocessor in CPU,
....etc) successfully installed in the system and update the BDA, EBDA...etc.
50 Programming the memory hole or any kind of implementation that needs an
adjustment in system RAM size if needed.
52 Updates CMOS memory size from memory found in memory test. Allocates
memory for Extended BIOS Data Area from base memory.
60 Initializes NUMI-LOCK status and programs that KBD typematic rate.
75 Initialize Int-13 and prepare for IPL detection.
78 Initializes IPL devices controlled by BIOS and option ROMs.
7A Initializes remaining option ROMs.
7C Generate and write contents of ESCD in NVRam.
84 Log errors encountered during POST.
85 Display errors to the user and gets the user response for error.
87 Execute BIOS setup if needed. requested.
8C Late POST initializations of system management interrupt.
8D Build ACPI tables (if ACPI is supported)
8E Program the peripheral parameters. Enable/Disable NMI as selected
90 Late POST initializations of system management interrupt
A0 Check boot password if installed
A1 Clean-up work needed before booting to OS
A2 Takes of runtime image preparation for different BIOS modules. Fill the free
area in F000h segment with 0FFh. Initializes the Microsoft IRQ Routing Table.
Repares the runtime language module. Disables the system configuration
display if needed.
A4 Initialize runtime language module
A7 Display the system configuration screen if enabled. Initialize the CPU’s before
boot, which includes the programming of the MTRR’s
A8 Prepare CPU for OS boot including final MTRR values
A9 Wait for user input at configure display if needed
AA Uninstall POST INT1Ch vector and INT09h vector. Reinitialize the ADM module.
AB Prepare BBS for Int 19 boot
AC End of POST initialization of chipset registers
B1 Save system context for ACPI
00 Passes control to OS Loader (typically INT19h)
Checkpoint Description