24 lpc fdd/lpt decode ranges (function 0), 24 lpc fdd/lpt decode ranges (function 0) -11 – Intel 460GX User Manual
Page 201
Intel® 460GX Chipset Software Developer’s Manual
11-11
LPC/FWH Interface Configuration
11.1.24
LPC FDD/LPT Decode Ranges (Function 0)
Address:
E1h
Default Value:
00h
Attributes:
Read/Write
3
Reserved.
2:0
Decode Range: The following table describes which range to decode for the COMA Port
Bits
Decode Range
000
3F8 - 3FF (COM 1)
001
2F8 - 2FF (COM 2)
010
220 - 227
011
228 - 22F
100
238 - 23F
101
2E8 - 2EF (COM 4)
110
338 - 33F
111
3E8 - 3EF (COM 3)
Bit
Description
Bit
Description
7:5
Reserved.
4
Decode Range: The following table describes which range to decode for the FDD Port
Bits
Decode Range
0
3F0 - 3F5, 3F7 (Primary)
1
370 - 375, 377 (Secondary)
3:2
Reserved.
1:0
Decode Range: The following table describes which range to decode for the LPT Port
Bits
Decode Range
00
378 - 37F, 778-77F
01
278 - 27F (port 279 is read only), 678-
67F
10
3BC - 3BE, 7BC-7BE
11
Reserved.