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M S-92A2 Server
Sample code to access IO Port 5Eh
IO Port 5Eh
Bit 0/1
Bit 2/3
POWER OFF Lan3-4/Lan1-2 Bypass
Set Bit 0 and 1 to High
mov
dx, 5Eh
in
al, dx
and
al, 0fch
or
al, 03h
out
dx, al
Set Bit 0 and 1 to Low
mov
dx, 5Eh
in
al, dx
and
al, 0fch
out
dx, al
Set Bit 2 and 3 to High
mov
dx, 5Eh
in
al, dx
and
al, 0f3h
or
al, 0ch
out
dx, al
Set Bit 2 and 3 to Low
mov
dx, 5Eh
in
al, dx
and
al, 0f3h
out
dx, al
2-10
High
POWER ON Lan3-4/Lan1-2 Bypass
Read 5Eh's value to al
Clear Bit 0 and 1
Set Bit 0 and 1 to high
Write to 5Eh
Read 5Eh's value to al
Clear Bit 0 and 1
Write to 5Eh
Read 5Eh's value to al
Clear Bit 2 and 3
Set Bit 2 and 3 to high
Write to 5Eh
Read 5Eh's value to al
Clear Bit 2 and 3
Write to 5Eh
Low
POWER ON Lan3-4/Lan1-2 Pass Through
POWER OFF Lan3-4/Lan1-2 Pass Through
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