Intel 815E Bedienungsanleitung PDF herunterladen (Seite 108)

User’s Manual

98 ECB-865 User’s Manual

Uncompressed Initialization Codes — The following runtime checkpoint hex codes are

listed in order of execution. These codes are uncompressed in F0000h shadow RAM.

Code Description

03 The NMI is disabled. Next, checking for a soft reset or a power on

condition.

05 The BIOS stack has been built. Next, disabling cache memory.

06 Uncompressing the POST code next.

07 Next, initializing the CPU and the CPU data area.

08 The CMOS checksum calculation is done next.

0B Next, performing any required initialization before the keyboard BAT

command is issued.

0C The keyboard controller input buffer is free. Next, issuing the BAT

command to the keyboard controller.

0E The keyboard controller BAT command result has been verified. Next,

performing any necessary INIT after the K/B controller BAT command

test.

0F The keyboard command byte is written next.

10 Next, issuing the pin 23 and 24 blocking and unblocking commands.

11 Next, checking if the <End> or <Ins> keys were pressed during power

on.

To initialize CMOS if the initialize CMOS RAM in every boot is set or

the <End> key is pressed. Going to disable DMA and Interrupt

controllers.

13 The video display has been disabled. Port B has been initialized. Next,

initialising the chipset.

14 The 8254 timer test will begin next.

19 The 8254 timer test is over. Starting the memory refresh test next.

1A The memory refresh line is toggling. Checking the 15us on/off time

next.

23 Reading the 8042 input port and disabling the MEGAKEY Green PC

feature next. Making the BIOS code segment writable and performing

any necessary configuration before initializing the interrupt vectors.

24 The configuration or setup required before interrupt vector initialization

has completed. Interrupt vector init. is about to begin

25 Interrupt vector initialization is done. Clearing the password if the

POST DIAG switch is on.

27 Any initialization before setting video mode to be done.

28 Going for monochrome mode and color mode setting.

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Intel 815E Bedienungsanleitung Seite 108