82NM10 Datasheet, PDF (364/671 Pages) Intel Corporation – Intel® NM10 Family Express Chipset

LPC Interface Bridge Registers (D31:F0)
Bit
Description
3:0 IRQ Routing — R/W. (ISA compatible.)
Value
0000b
0001b
0010b
0011b
0100b
0101b
0110b
0111b
IRQ
Reserved
Reserved
Reserved
IRQ3
IRQ4
IRQ5
IRQ6
IRQ7
Value
1000b
1001b
1010b
1011b
1100b
1101b
1110b
1111b
IRQ
Reserved
IRQ9
IRQ10
IRQ11
IRQ12
Reserved
IRQ14
IRQ15
13.1.20 LPC_I/O_DEC—I/O Decode Ranges Register
(LPC I/F—D31:F0)
Offset Address: 80h
Default Value: 0000h
Attribute:
Size:
R/W
16 bit
Bit
Description
15:13 Reserved
12 FDD Decode Range — R/W. Determines which range to decode for the FDD Port
0 = 3F0h – 3F5h, 3F7h (Primary)
1 = 370h – 375h, 377h (Secondary)
11:10 Reserved
9:8 LPT Decode Range — R/W. This field determines which range to decode for the LPT
Port.
00 = 378h – 37Fh and 778h – 77Fh
01 = 278h – 27Fh (port 279h is read only) and 678h – 67Fh
10 = 3BCh –3BEh and 7BCh – 7BEh
11 = Reserved
7 Reserved
6:4 COMB Decode Range — R/W. This field determines which range to decode for the
COMB Port.
000 = 3F8h – 3FFh (COM1)
001 = 2F8h – 2FFh (COM2)
010 = 220h – 227h
011 = 228h – 22Fh
100 = 238h – 23Fh
101 = 2E8h – 2EFh (COM4)
110 = 338h – 33Fh
111 = 3E8h – 3EFh (COM3)
3 Reserved
364
Datasheet