MSI 945GC Networks - Manual (Page 24)

2-8
M S-96C4 Server Board
Sample code to access IO Port 5Eh
Set Bit 0 and 1 to High
mov dx, 5Eh
in al, dx
Read 5Eh's value to al
and al, 0fch Clear Bit 0 and 1
or al, 03h Set Bit 0 and 1 to high
out dx, al Write to 5Eh
Set Bit 0 and 1 to Low
mov dx, 5Eh
in al, dx
Read 5Eh's value to al
and al, 0fch Clear Bit 0 and 1
out dx, al Write to 5Eh
Set Bit 2 and 3 to High
mov dx, 5Eh
in al, dx
Read 5Eh's value to al
and al, 0f3h Clear Bit 2 and 3
or al, 0ch Set Bit 2 and 3 to high
out dx, al Write to 5Eh
Set Bit 2 and 3 to Low
mov dx, 5Eh
in al, dx
Read 5Eh's value to al
and al, 0f3h Clear Bit 2 and 3
out dx, al Write to 5Eh
IO Port 5Eh High Low
Bit 0/1 POWER ON LAN 1-2 Bypass POWER ON LAN 1-2 Pass Through
Bit 2/3 POWER OFF LAN 1-2 Bypass POWER OFF LAN 1-2 Pass Through
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