AMD-766 Datasheet, PDF (39/96 Pages) Advanced Micro Devices – Peripheral Bus Controller

23167B – March 2001
Preliminary Information
AMD-766^TM Peripheral Bus Controller Data Sheet
C0A52: LPC Bus Decode Register 1
Configuration space; function 0; offset: 52h Default: 00h Read-write.
7
6:4
3
2:0
SBEN
SBRANGE
SAEN
SARANGE
SARANGE and SBRANGE. Serial port A and B range. Selects the serial port IO ranges routed to the LPC bus.
S[A,B]RANGE Range
000b
3F8 - 3FFh (COM1)
001b
2F8 - 2FFh (COM2)
010b
220 - 227h
011b
228 - 22Fh
S[A,B]RANGE Range
100b
238 - 23Fh
101b
2E8 - 2EFh (COM4)
110b
338 - 33Fh
111b
3E8 - 3EFh (COM3)
SAEN and SBEN. Serial ports A and B enable. 1=Serial port IO port accesses specified by the corresponding
RANGE field in this register are routed to the LPC bus (SAEN enables SARANGE and SBEN enables SBRANGE).
0=These accesses are routed to the ISA bus.
C0A53: LPC Bus Decode Register 2
Configuration space; function 0; offset: 53h Default: 00h Read-write.
7
6
5:4
3
2
1:0
Reserved MEN
MRANGE
AL
AEN
ARANGE
ARANGE. Audio range. Selects the audio device range routed to the LPC bus as follows:
ARANGE
00b
01b
10b
11b
Range
220 - 233h
240 - 253h
260 - 273h
280 - 293h
AEN. Audio enable. 1=Audio IO port accesses specified by the ARANGE field in this register are routed to the LPC
bus. 0=These accesses are routed to the ISA bus.
AL. Audio legacy enable. 1=Audio legacy IO ports, 388h - 389h, are routed to the LPC bus. 0=These accesses are
routed to the ISA bus.
MRANGE. MIDI range. Selects the MIDI device range routed to the LPC bus as follows:
MRANGE
00b
01b
10b
11b
Range
300 - 301h
310 - 311h
320 - 321h
330 - 331h
MEN. MIDI enable. 1=MIDI IO port accesses specified by the MRANGE field in this register are routed to the LPC
bus. 0=These accesses are routed to the ISA bus.
C0A54: LPC Bus Decode Register 3
Configuration space; function 0; offset: 54h. Default: 00h. Read-write.
7:6
Reserved
5
4
ASIO
SIO
3
2
RESERVED MSEN
1:0
MSRANGE
MSRANGE. MSS range. Selects the MSS device range routed to the LPC bus as follows:
MSRANGE Range
00b
530 - 537h
01b
604 - 60Bh
10b
E80 - E87h
11b
F40 - F47h
MSEN. MSS enable. 1=MSS IO port accesses specified by the MSRANGE field in this register are routed to the
LPC bus. 0=These accesses are routed to the ISA bus.
SIO. Super IO configuration. 1=Super IO configuration IO ports, 2Eh - 2Fh, are routed to the LPC bus. 0=These
accesses are routed to the ISA bus.
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