Passing control to video ROM
2Ch
Control returned from video ROM
2Dh
Check for EGA/VGA adapter
2Eh
No EGA/VGA found, test video memory
2Fh
Scan for video retrace signal
30h
Primary retrace failed
31h
Alternate found
32h
Verify video switches
33h
Establish display mode
34h
Initialize ROM BIOS data area
35h
Set cursor for power-on msg
36h
Display power-on message
37h
Save cursor position
38h
Display BIOS identification string
39h
Display “Hit <DEL> to...” message
3Ah
Prepare protected mode test
40h
Prepare descriptor tables
41h
Enter virtual mode for memory test
42h
Enable interrupts for diagnostics mode
43h
Initialize data for memory wrap test
44h
Test for wrap, find total memory size
45h
Write extended memory test patterns
46h
Write conventional memory test patterns
47h
Find low memory size from patterns
48h
Find high memory size from patterns
49h
Verify ROM BIOS data area again
4Ah
Check for <DEL> pressed
4Bh
Clear extended memory for soft reset
4Ch
Save memory size
4Dh
Cold boot: Display 1
st
64KB memtest
4Eh
4Fh
Cold boot: Test all of low memory
50h
Adjust memory size for EBDA usage
51h
Cold boot: Test high memory
52h
Prepare for shutdown to real mode
53h
Return to real mode
54h
Shutdown successful
55h
Disable A20 line
56h
Check ROM BIOS data area again
57h
Check ROM BIOS data area again
58h
Clear “Hit <DEL>” message
59h
Test DMA page register file
60h
Verify from display memory
61h
Test DMA0 base register
62h
Test DMA1 base register
63h
Checking ROM BIOS data area again
64h
Checking ROM BIOS data area again
65h
Program DMA controllers
66h
Initialize PICs
67h
Start keyboard test
80h
Issue KB reset command
99
Содержание 5266
Страница 18: ...Figure 2 1 5266 component diagram top 18 ...
Страница 19: ...Figure 2 2 5266 component diagram bottom 19 ...
Страница 20: ...Figure 2 3 5266 dimensions inches 20 ...
Страница 21: ...Figure 2 4 5266 dimensions mm 21 ...