97
2Dh
2Eh
2Fh
30h
31h
32h
33h
34h
35h
36h
37h
38h
39h
3Ah
40h
41h
42h
43h
44h
45h
46h
47h
48h
49h
4Ah
4Bh
4Ch
4Dh
4Eh
4Fh
50h
51h
52h
53h
54h
55h
56h
57h
58h
59h
60h
61h
62h
63h
64h
65h
66h
67h
80h
81h
Control returned from video ROM
Check for EGA/VGA adapter
No EGA/VGA found, test video memory
Scan for video retrace signal
Primary retrace failed
Alternate found
Verify video switches
Establish display mode
Initialize ROM BIOS data area
Set cursor for power-on msg
Display power-on message
Save cursor position
Display BIOS identification string
Display “Hit <DEL> to...” message
Prepare protected mode test
Prepare descriptor tables
Enter virtual mode for memory test
Enable interrupts for diagnostics mode
Initialize data for memory wrap test
Test for wrap, find total memory size
Write extended memory test patterns
Write conventional memory test patterns
Find low memory size from patterns
Find high memory size from patterns
Verify ROM BIOS data area again
Check for <DEL> pressed
Clear extended memory for soft reset
Save memory size
Cold boot: Display 1
st
64KB memtest
Cold boot: Test all of low memory
Adjust memory size for EBDA usage
Cold boot: Test high memory
Prepare for shutdown to real mode
Return to real mode
Shutdown successful
Disable A20 line
Check ROM BIOS data area again
Check ROM BIOS data area again
Clear “Hit <DEL>” message
Test DMA page register file
Verify from display memory
Test DMA0 base register
Test DMA1 base register
Checking ROM BIOS data area again
Checking ROM BIOS data area again
Program DMA controllers
Initialize PICs
Start keyboard test
Issue KB reset command
Check for stuck keys
Summary of Contents for XE-900
Page 19: ...19 Figure 2 1 XE 900 SBC component diagram top ...
Page 20: ...20 Figure 2 2 XE 900 SBC component diagram bottom ...
Page 21: ...21 Figure 2 3 XE 900 SBC dimensions without Integrated Conductive Cooling System ...
Page 38: ...38 ...
Page 91: ...91 Figure 15 2 Dimensions for the Integrated Conductive Cooling System ...