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FW82371 数据表(PDF) 9 Page - Intel Corporation

部件名 FW82371
功能描述  PCI-TO-ISA / IDE XCELERATOR PIIX4
Download  284 Pages
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制造商  INTEL [Intel Corporation]
网页  http://www.intel.com
标志 INTEL - Intel Corporation

FW82371 数据表(HTML) 9 Page - Intel Corporation

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82371AB (PIIX4)
9
4/9/97 2:23 PM PIIX4aDS
INTEL CONFIDENTIAL
(until publication date)
PRELIMINARY
8.1.1. I/O Accesses .....................................................................................................................................154
8.1.2. Memory Address Map........................................................................................................................154
8.1.3. BIOS Memory ....................................................................................................................................155
8.2. PCI Interface.............................................................................................................................................157
8.2.1. Transaction Termination ....................................................................................................................157
8.2.2. Parity Support ....................................................................................................................................157
8.2.3. PCI Arbitration....................................................................................................................................157
8.3. ISA/EIO Interface......................................................................................................................................158
8.4. DMA Controller .........................................................................................................................................158
8.4.1. DMA Transfer Modes.........................................................................................................................159
8.4.2. DMA Transfer Types .........................................................................................................................160
8.4.3. DMA Timings .....................................................................................................................................161
8.4.4. DMA Buffer for Type F Transfers ......................................................................................................161
8.4.5. DREQ and DACK# Latency Control..................................................................................................161
8.4.6. Channel Priority .................................................................................................................................162
8.4.7. Register Functionality ........................................................................................................................162
8.4.8. Address Compatibility Mode ..............................................................................................................162
8.4.9. Summary of DMA Transfer Sizes......................................................................................................163
8.4.9.1. Address Shifting When Programmed for 16-Bit I/O Count by Words.........................................163
8.4.10. Autoinitialize.....................................................................................................................................163
8.4.11. Software Commands .......................................................................................................................164
8.4.12. ISA Refresh Cycles .........................................................................................................................164
8.5. PCI DMA...................................................................................................................................................165
8.5.1. PC/PCI DMA......................................................................................................................................165
8.5.2. Distributed DMA.................................................................................................................................168
8.6. Interrupt Controller ....................................................................................................................................171
8.6.1. Programming the Interrupt Controller ................................................................................................172
8.6.2. End-of-Interrupt Operation.................................................................................................................173
8.6.3. Modes of Operation ...........................................................................................................................173
8.6.4. Cascade Mode...................................................................................................................................175
8.6.5. Edge and Level Triggered Mode........................................................................................................175
8.6.6. Interrupt Masks ..................................................................................................................................176
8.6.7. Reading the Interrupt Controller Status .............................................................................................176
8.6.8. Interrupt Steering ...............................................................................................................................177
8.7. Serial Interrupts.........................................................................................................................................178
8.7.1. Protocol..............................................................................................................................................178
8.8. Timer/Counters .........................................................................................................................................180
8.8.1. Programming the Interval Timer ........................................................................................................180
8.9. Real Time Clock .......................................................................................................................................183
8.9.1. RTC Registers and RAM ...................................................................................................................183
8.9.1.1. Control Register A.......................................................................................................................185
8.9.1.2. Control Register B.......................................................................................................................186
8.9.1.3. Control Register C ......................................................................................................................187


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