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**82495XP/490XP Cache Controller / Cache RAM (for i860) 06/05/91
***Notes:...
***Info:
The Intel 82495XP cache controller and 82490XP cache RAM, when coupled
with a user-implemented memory bus controller, provide a second-level
cache subsystem that eliminates the memory latency and bandwidth
bottleneck for a wide range of multiprocessor systems based on the
i860 XP microprocessor. The CPU interface is optimized to serve the
i860 XP microprocessor with zero wait states at up to 50 MHz. A
secondary cache built from the 82495XP and 82490XP isolates the CPU
from the memory subsystem; the memory can run slower and follow a
different protocol than the i860 XP microprocessor.
***Features:...
**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)...
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*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...
**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
***Notes:...
***Info:...
***Configurations:...
***Features:...
**
**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...
*Winbond...
*ZyMOS...
*General Sources:...
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