VT82C686B
Super-I/O Configuration Registers (I/O Space)
Super-I/O I/O Ports
Offset Floppy Disk Controller (Base = E3) Default Acc
Port Super-I/O Configuration Registers Default Acc
3F0 Super-I/O Config Index (Rx85[1]=1)
3F1 Super-I/O Config Data (Rx85[1]=1)
00
00
RW
RW
00-01 -reserved-
02 FDC Command
03 -reserved-
04 FDC Main Status
04 FDC Data Rate Select
05 FDC Data
00
--
00
--
02
--
00
--
--
RW
--
RO
WO
RW
--
Super-I/O Configuration Registers (Indexed via Port
3F0/1)
Offset Super-I/O Control
00-DF -reserved-
E0 Super-I/O Device ID
E1 Super-I/O Device Revision
E2 Function Select
E3 Floppy Ctrlr Base Addr (def = 3F0-7)
E4-E5 -reserved-
E6 Parallel Port Base Addr (def = 378-F)
E7 Serial Port 1 Base Addr (def = 3F8-F)
E8 Serial Port 2 Base Addr (def = 2F8-F)
E9-ED -reserved-
EE Serial Port Configuration
EF Power Down Control
F0 Parallel Port Control
F1 Serial Port Control
F2 Test Mode (Do Not Program)
F3 -reserved-
F4 Test Mode (Do Not Program) 2
F5 -reserved-
F6 Floppy Controller Configuration
F7 -reserved-
Default Acc
06 -reserved-
07 Disk Change Status
00
3C
00
03
FC
00
DE
FE
BE
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
RO
RW
RW
RW
RW
RO
RW
RW
RW
RO
RW
RW
RW
RW
RW
RO
RW
RO
RW
RO
RW
RO
RW
RO
RO
Offset Parallel Port (Base = E6)
00 Parallel Port Data
01 Parallel Port Status
02 Parallel Port Control
03 EPP Address
04 EPP Data Port 0
05 EPP Data Port 1
06 EPP Data Port 2
07 EPP Data Port 3
Default Acc
--
--
E0
RW
RO
RW
RW
RW
RW
RW
RW
RW
RW
RW
400h ECP Data / Configuration A
401h ECP Configuration B
402h ECP Extended Control
Offset Serial Port 1 (Base = E7)
Default Acc
RW
0
1
2
2
3
4
5
6
7
Transmit (Wr) / Receive (Rd) Buffer
Interrupt Enable
FIFO Control
Interrupt Status
UART Control
Handshake Control
UART Status
Handshake Status
Scratchpad
RW
WO
RO
RW
RW
RW
RW
RW
F8 Floppy Controller Drive Select
F9-FB -reserved-
FC General Purpose I/O
FD-FF -reserved-
9-8 Baud Rate Generator Divisor
A-F -undefined-
RW
--
Offset Serial Port 2 (Base = E8)
Default Acc
RW
0
1
2
2
3
4
5
6
7
Transmit (Wr) / Receive (Rd) Buffer
Interrupt Enable
FIFO Control
Interrupt Status
UART Control
Handshake Control
UART Status
Handshake Status
Scratchpad
RW
WO
RO
RW
RW
RW
RW
RW
9-8 Baud Rate Generator Divisor
A-F -undefined-
RW
--
Revision 1.71 June 9, 2000
-29-
Register Overview
ETC [ ETC ]
