Gateway ALR 9250R, User Manual

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166 Gateway ALR 9250R User’s Guide
Error messages and codes
When you turn on the system, POST displays messages that provide
information about the system. If a failure occurs, POST emits beep codes
that indicate errors in hardware, software, or firmware. If POST can display
a message on the video display screen, the speaker beeps twice as the
message appears.
POST codes and port-80h codes
The BIOS indicates the current testing phase during POST by outputting a
2-digit hex code to I/O location 80h. If a port-80h ISA POST board is
installed, it displays the 2-digit code on a pair of hex display LEDs. The
table Port-80h Codes and Beep Codes below lists the hex codes and their
meanings.
Port-80h Codes and Beep Codes
Port-80
Codes Beep
Codes Error Descriptions
02 Verify Real Mode
04 Get processor type
06 Initialize system hardware
08 Initialize chipset registers with initial POST values
09 Set in POST flag
0A Initialize processor registers
0B Enable processor cache
0C Initialize caches to initial POST values
0E Initialize I/O
0F Initialize the local bus IDE
10 Initialize Power Management
11 Load alternate registers with initial POST values new
12 Restore processor control word during warm boot
14 Initialize keyboard controller
16 1-2-2-3 BIOS ROM checksum
18 8254 timer initialization
1A 8237 DMA controller initialization
1C Reset Programmable Interrupt Controller
20 1-3-1-1 Test DRAM refresh
9250R.book Page 166 Friday, April 9, 1999 9:44 AM