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**82495DX/490DX DX CPU-Cache Chip Set <Sep91
***Notes:...
***Info:...
***Configurations:...
***Features:...
**82495XP/490XP Cache Controller / Cache RAM (for i860) 06/05/91...
**82496/491 Cache Controller / Cache RAM (for P5 Pentium) 03/22/93...
**82497/492 Cache Controller / Cache RAM (for P54 Pentium) <Nov94...
**82498/493 Cache Controller / Cache RAM (for P54 Pentium) <Nov94...
**
**Later chipsets (basic spec):
**440 series:...
**450NX (?) 06/29/98:...
**????? (Profusion) c:99...
**800 series...
*Headland/G2...
*HMC (Hulon Microelectronics)...
*Logicstar...
*Motorola...
*OPTi...
**82C566/7/8 Viper-Max Chipset Scalable MultiMedia PC Solution ?
***Info:...
***Configurations:...
***Features:
CPU Interface
o Fully supports all Intel 3.3V Pentium processors (P54C, P55C,
P55CT) at 50, 60, and 66.667MHz
o Supports AMD K86 and Cyrix 6x86 processors
o Supports the Cyrix 6x86 processor linear burst mode
o Chipset solution:
- One Data Buffer Controller (82C566)
- One System Controller (82C567)
- One Integrated Peripherals Controller (82C568)
o Supports CPU address pipelining
Cache Interface
o Support four types of devices:
- Synchronous SRAM bursting at 3-1-1-1
- Pipelined burst SRAM bursting at 3-1-1-1
- Sony SONIC-2WP module bursting at 2-1-1-1
- Asynchronous SRAM bursting at 3-2-2-2
o Supports four cache sizes:
- 256KB, 512KB, 1MB and 2MB
o Programmable write policy:
- Write-back
- Adaptive write-back
- Write-through
DRAM Interface
o Supports both Unified Memory Architecture (UMA) and non-UMA
interfaces
o Supports symmetrical and asymmetrical DRAMS
o Supports both 3.3V and 5.0V DRAM devices
o Supports 64-bit wide DRAM devices with 256KB, 512KB, 1MB, 2MB,
4MB, 8MB, and 16MB addressing
o Supports DRAM configurations up to 512MB
o Six banks of FP mode DRAMs (7-3-3-3 at 66MHz)
o Six banks of EDO DRAM support with auto detection (5-2-2-2 at
66MHz)
o Four banks of BEDO (burst EDO) (X-1-1-1 at 66MHz)
o Four banks of SDRAM (synchronous DRAM) (X-1-1-1 at 66MHz)
o Deep buffering for DRAM performance
- Six quad-word CPU-to-DRAM write posting
- 24 double-word PCI-to-DRAM write posting
- 24 double-word DRAM-to-PCI read prefetch
o Supports mixed DRAM memory technologies
- FP mode/EDO/SDRAM
- FP mode/EDO/BEDO
o Memory parity support
o Programmable drive currents for the DRAM control signals
o Hidden refresh with CAS-before-RAS refresh supported
o Self-refresh supported during Suspend mode
o Support for two programmable non-cacheable memory regions
Unified Memory Interface
o Industry Standard UMA implementation
o Compatible with all major graphics chip vendors
o Supports 0.5, 1.0, 2.0, 3.0, and 4.0MB of shared frame, buffer for
GUI (Graphical User interface) within system DRAM
o Two-pin arbitration scheme with multiple request levels
PCI Interface
o PCI Specification 2.1 compliant
- Supports delayed transactions
o X-1-1-1 PCI to memory burst transfer performance (transfer
rate > 100MB/sec)
o Interfaces the CPU and standard buses to Peripheral Component
Interconnect (PCI) operating in synchronous/asynchronous modes
o CPU-to-PCI deep write posting buffers (six double-words)
o PCI-to-DRAM deep write posting and read prefetch buffers
(24 double-words)
o Supports five PCI masters and six ISA slots
o Supports PCI pre-snoop for PCI masters
o PCI byte/word merge support for CPU accesses to PCI bus, and
support for PCI prefetch
o Several levels of concurrence
- PCI-to-PCI / CPU-to-memory
- PCI-to-DRAM / CPU-to-cache
- CPU-to-PCI / GUI-to-memory
IDE Interface
o Integrated bus master IDE conforms to SFF Specification
o Two channels supported (up to four devices)
o PIO Mode transfer support (up to Mode 5)
o Enhanced ATA Specification support
o Single- and/or Multi-Word DMA Mode 2 timing
o Scatter/Gather feature
o Built-in FIFOs with data prefetch and post write support
Universal Serial Bus
o Support for Universal Serial Bus (USB) interface for serial
peripherals
System I/O and Power Management
o Enhanced DMA interface
- Type F DMA for faster device transfer
- Distributed DMA for moving ISA function to PCI
- Buffered DMA for efficient POI/DRAM bandwidth
- Two steerable DMA channels for motherboard plug and play
o Enhanced interrupt interface
- Serial interrupt for moving ISA function to PCI
- Two steerable interrupts for motherboard plug and play
o Includes a fully integrated 820206 with external real-time clock
(RTC) interface
o Facility to read current CMOS index
o "True" GREEN power management support, with support for STPCLK#
modulation and the CPU stop clock state
o Packaged in three 208-pin PQFPs (Plastic Quad Flat Packs)
**82C571/572 486/Pentium c:93...
**82C576/7/8 Viper Xpress [no datasheet] ?...
**82C576/8/9 Viper XPress+ [no datasheet, some info] <01/16/97
***Notes:...
***Info:...
***Configurations:...
**82C596/597 PTMAWB Pentium Adaptive Write-back (Cobra) c:93...
**82C650/1/2 Discovery (Pentium Pro) [no datasheet] ?...
**82C681/2/6/7 386/486WB EISA c:92...
**82C683 386/486AWB EISA [no datasheet] ?...
**82C693/6/7 Pentium uP Write Back Cache EISA c:93...
**82C700 FireStar c:97...
**82C701 FireStar Plus c:97...
**82C750 Vendetta [no datasheet] ?...
**82c801 SCWB2 DX Single Chip Solution c:92...
**82C802 SCWB2 PC/AT Single Chip [no datasheet] ?...
**82C802G/GP System/Power Management Controller (cached) c:93...
**82C895 System/Power Management Controller (cached) c:Sep94...
**82C898 System/Power Management Controller (non-cache)c:Nov94...
**
**Support Chips:
**82C601/2 Buffer Devices <Nov94...
**82C822 PCIB (VLB-to-PCI bridge) c:94...
**Other:...
*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
*SIS...
*Symphony...
*TI (Texas Instruments)...
*UMC...
*Unresearched:...
*VIA...
*VLSI...
*Western Digital...
**WD7700/LP System Chip Set for 80286 or 80386SX (Cache) <11/25/91
***Info:...
***Configurations:...
***Features:...
**WD7855 System controller for 80386SX <09/25/92...
**WD7900/LP/LV System Chip Set for 80286 or 80386SX (Cache) <11/25/91...
**WD8110 System controller for 80386DX/486 <11/30/93...
**
**Support Chips:
**WD76C20x Floppy, RTC, IDE and Support Logic Device <11/25/91...
**WD76C30x Perip. Ctrl, Interrupt Multiplex, and Clock Gen <11/18/91...
**WD7615 Desktop Buffer Manager <04/15/92...
**WD7625 Desktop Buffer Manager <10/01/92...
**WD8120LV Super I/O [no datasheet] ?
**Other Chips:...
*Winbond...
*ZyMOS...
*General Sources:...
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