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參數(shù)資料
| 型號： | QT0086202TME |
| 英文描述： | Controller Miscellaneous - Datasheet Reference |
| 中文描述： | 控制器雜項-數(shù)據(jù)表參考 |
| 文件頁數(shù)： | 38/62頁 |
| 文件大?。?/td> | 268K |
| 代理商： | QT0086202TME |
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82C814
Page 28
January 08, 1998
912-3000-047
Revision: 1.0
OPTi
PCICFG 3Fh
Bridge Control Register - Byte 1
Default = 03h
Reserved. Write as read.
Write posting:
0 = Disable
1 = Enable
Memory Win-
dow 1 prefetch:
0 = Disable
1 = Enable
(Default)
Memory Win-
dow 0 prefetch:
0 = Disable
1 = Enable
(Default)
PCICFG 40h
Subsystem Vendor Bits:
-
The chipset responds to reads of this register with the first value written. The register can be written only once, then becomes read only.
-
If the option is selected, the EXTCLK pin can be used as DRVVENID# to enable external logic to drive this data onto the bus. In this
case, the chipset claims the access but does not drive any data.
Subsystem Vendor Register - Byte 0: Bits [7:0]
Default = 00h
PCICFG 41h
Subsystem Vendor Register - Byte 1: Bits [15:8]
Default = 00h
PCICFG 42h
Subsystem ID
-
The chipset responds to reads of this register with the first value written. The register can be written only once, then becomes read only.
-
If the option is selected, the EXTCLK pin can be used as DRVVENID# to enable external logic to drive this data onto the bus. In this
case, the chipset claims the access but does not drive any data.
Subsystem ID Register - Byte 0: Bits [7:0]:
Default = 00h
PCICFG 43h
Subsystem ID Register - Byte 1: Bits [15:8]
Default = 00h
PCICFG 44h - 47h
Reserved
Default = 00h
PCICFG 48h
Docking PCIRQ0# Interrupt Assignment Register
Default = 01h
Reserved
Using OPTi IRQ driveback mechanism:
Docking Interrupt Assignment (PCIRQ0# Default) - Interrupts from the docking
PCIRQ0# pin are mapped to this interrupt. Note that if an IRQ (an edge-mode interrupt)
is selected, this IRQ must be programmed to Level mode on the host chipset.
Level Mode:
00000 = Disabled
00010 = PCIRQ1#
00001 = PCIRQ0# (Default) 00011 = PCIRQ2#
Edge Mode: (Viper-N+)
10000 = IRQ0
10110 = IRQ6
10001 = IRQ1
10111 = IRQ7
10010 = IRQ2
11000 = IRQ8
10011 = IRQ3
11001 = IRQ9
10100 = IRQ4
11010 = IRQ10
10101 = IRQ5
Using Host PCI INTA#-D# (PCICFG 50h[6]=1)
000 = Disabled
001 = INTA# (default)
010 = INTB#
00100 = PCIRQ3#
00101-01111 = Rsrvd
11011 = IRQ11
11100 = IRQ12
11101 = IRQ13
11110 = IRQ14
11111 = IRQ15
Reserved
011 = INTC#
100 = INTD#
101-111 = Reserved
Table 5-1
Base Register Group - PCICFG 00h-4Fh (cont.)
7
6
5
4
3
2
1
0
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