pc87317vul National Semiconductor Corporation, pc87317vul Datasheet - Page 157

• Manufacturer Part Number: pc87317vul
• Description: Pc87317vul/pc97317vul Superi/o Plug And Play Compatible With Acpi Compliant Controller/extender
• Manufacturer: National Semiconductor Corporation

6.7 PARALLEL PORT REGISTER BITMAPS
6.7.1
0
0
1
1
7
7
7
7
Printer Status
Reserved
D7
A7
0
0
1
1
6
6
6
6
EPP Modes
ACK Status
D6
A6
Reserved
0
0
1
0
5
5
5
5
A5
D5
Direction Control
PE Status
0
0
1
0
4
4
4
4
D4
A4
SLCT Status
Interrupt Enable
0
0
1
0
3
3
3
3
A3
D3
Parallel Port Input Control
ERR Status
0
0
1
0
2
2
2
2
EPP Device or
Register Selection
Address Bits
Data Bits
D2
A2
Printer Initialization Control
IRQ Status
0
0
1
0
1
1
1
1
Automatic Line Feed Control
D1
A1
0
Reserved
0
1
0
0
0
0
0
D0
Reset
Required
A0
Reset
Required
Reset
Required
Reset
Required
Time-Out Status
Data Strobe Control
SPP or EPP Control
SPP or EPP Status
SPP or EPP Data
Register (DTR)
Register (CTR)
Register(STR)
EPP Address
Parallel Port (Logical Device 4)
Offset 03h
Offset 00h
Offset 01h
Offset 02h
Register
157
0
0
0
7
7
7
0
7
D15
D7
D23
D31
0
0
0
6
6
6
0
6
D14
D6
D22
D30
0
0
0
5
5
5
0
5
D13
D5
D21
D29
0
0
0
4
4
4
0
4
D12
D4
D20
D28
0
0
0
3
3
3
0
3
D11
D3
D19
D27
0
0
0
2
0
2
2
2
EPP Device
Read or Write Data
EPP Device
Read or Write Data
D10
D2
D18
EPP Device
Read or Write Data
D26
0
0
0
EPP Device
Read or Write Data
1
0
1
1
1
D1
D17
D25
0
0
0
D9
0
0
0
0
0
D0
D16
Reset
Required
Reset
Required
Reset
Required
D24
D8
Reset
Required
Register 1
Offset 05h
Offset 04h
Offset 06h
Offset 07h
Register 0
Register 2
Register 3
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EPP Data
EPP Data
EPP Data
EPP Data