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*Intel...
**82485 Turbo Cache (and 485Turbocache) c90
***Notes:...
***Info:
The 82485 is a second-level cache controller designed to improve the
performance of Intel486 Microprocessor systems. One 82485 cache
controller supports 64K or 128K bytes of second level cache memory
that maps to the entire 4 Gigabytes of the Intel486 microprocessor
address space. The controller is completely software transparent. One
controller plus SRAMs provides a 64K or a 128K cache. External EPROM
can be cached yet remain write protected. The 82485 is fully
compatible with the Intel486 microprocessor. All Intel486 CPU bus
cycles and timings are supported.
A complete, optional second level cache controller using the 82485 is
available as the 485Turbocache Module from Intel (data sheet order
number 240722).
2.0 FUNCTIONAL DESCRIPTION
2.1 Introduction
The 82485 is a single ported, two-way set associative cache controller
designed specifically to interface with the Intel486 microprocessor.
The controller supports either a sectored configuration (two lines per
tag) or a non-sectored configuration (one line per tag). The 82485
will directly support a nonsectored 64K data cache or a 128K sectored
data cache. Both the 64K and 128K configurations are able to map the
entire 4 gigabytes of the Intel486 microprocessor address space. The
82485 interfaces directly to the Intel486 microprocessor. All Intel-
486 CPU bus cycles and timings are supported. The 82485 also supports
0 wait state processor operation when there is a cache hit and has
provisions to support invalidation cycles, BOFF# cycles, and premature
BLAST# terminations. The controller is look aside (monitors bus act-
ivity in parallel to the processor) and write through (all writes pro-
pagate to the system bus), so it supports the same cache consistency
mechanisms as the Intel486 CPU. The controller also provides a safe
method to cache ROM BIOS through the use of a write protect pin and a
write protect strapping option.
The data cache (Static RAM) resides external to the 82485. The 82485
provides all controls for the SRAMs. No external latches or tran-
ceivers are required. The 82485 output buffers support up to eight
SRAMs. A 64K cache can be designed with only five components; nine
components for a 128K cache. Two-way set associativity is provided by
dual banked SRAMs. Data parity is supported.
The 82485 can be used to design a custom second level cache
configuration. For an easier system design and higher integration, the
82485M Turbocache can be used (see data sheet order number 240722).
This module is a complete second level cache in one package. It
consists of a single 82485 cache controller and SRAM to provide a
complete 64K or 128K second level Intel486 microprocessor second level
cache.
***Versions:...
***Features:...
**82489DX Advanced Programmable Interrupt Controller 10/12/92...
**82495DX/490DX DX CPU-Cache Chip Set <Sep91...
**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...
*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
*SIS...
**5591/5592/5595 (David) Pentium PCI A.G.P. Chipset <01/09/98
***Info:...
***Configurations:...
***Features:...
**5596/5513 (Genesis) Pentium PCI Chipset <03/26/96...
**5597/5598 (Jedi) Pentium PCI/ISA Chipset <04/15/97...
**530/5595 (Sinbad) Host, PCI, 3D Graphics & Mem. Ctrl.<11/10/98...
**540 (Spartan) Super7 2D/3D Ultra-AGP Single C.S.<11/30/99...
**55x SoC (System-on-chip) <03/14/02...
**
**Support chips:
**85C206 Integrated Peripheral Controller [no datasheet] ?...
**5595 Pentium PCI System I/O <12/24/97...
**950 LPC I/O <07/16/99...
**Other:...
**PII/III/Pro...
**Athlon etc...
*Symphony...
*TI (Texas Instruments)...
*UMC...
*Unresearched:...
*VIA...
*VLSI...
*Western Digital...
**FE3400/B 80286-Based AT Compatible CPU Core Logic (12 MHz) c:86
***Info:...
***Configurations:...
***Features:...
**FE3500/B 80286-Based AT Compatible CPU Core Logic (12 MHz) c:87...
**FE3600/A/B/C 16/20MHz AT Chip set c:88...
**FE5300 CPU Core Logic for PS/2 Model 50/60 Compatibles c:87...
**FE5400 CPU Core Logic for PS/2 Model 50/60 Compatibles c:87...
**FE6500 CPU Core Logic for PS/2 Model 70/80 Compatibles c:88...
**WD6400SX/LP CPU Core Logic for PS/2 386SX Compatibles <90...
**WD6500 CPU Core Logic for PS/2 386DX/486 Compatible <90...
**WD7600A/LP/LV System Chip Set for 80286 or 80386SX <11/25/91...
**WD7700/LP System Chip Set for 80286 or 80386SX (Cache) <11/25/91...
**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:
SYSTEMS LOGIC/PERIPHERAL DEVICES
WD16C451, WD16C551 - Enhanced Asynchronous Communications Element (ACE) with Parallel Port
WD16C452, WD16C552 - Dual Enhanced Asynchronous Communications Element (ACE)
WD16C550 Enhanced Asynchronous Communications Element (ACE) with FIFOs
WD76C10AlLP/LV ISA-Based System Controller for 80386SX and 80286 Desktop and Portable Compatibles
WD76C20/LV Floppy Disk Controller, Real Time Clock, IDE Interface, and Support Logic Device
WD76C30/LV Peripheral Controller, Interrupt Multiplexer, and Clock Generator Device
WD7710/LP ISA-Based System Controller with Cache for 80386SX and 80286 Desktop and Portable Compatibles
WD7910/LP ISA-Based System Controller with Cache for 80386SX and 80286 Desktop and Portable Compatibles
IMAGING DEVICES
ICS90C61A Dual Video/Memory Clock Generator
ICS90C63 Dual Video/Memory Clock Generator
ICS90C64 Dual Video/Memory Clock Generator
WD90C00 VGA Controller (8514/A clone, max 1MB, 1024x768x16, 800x600x256)
WD90C01 8514/A for laptops
WD90C10 VGA, 256KB
WD90C11, WD90C11A Enhanced VGA Controller (max 512KB, 1024x768x16, 800x600x256)
WD90C20, WD90C20A VGA Flat Panel Display Controller (800x600x16, 640x460x256, 32 shades gray)
WD90C22 VGA Flat Panel Display Controller (800x600x16, 640x460x256, 64 shades gray)
WD90C24/A/A2 SVGA, max 1MB, 1280x1024x16, 1024x768x16, LCD, VESA-LB, 3.3 or 5V
WD90C26 VGA Flat Panel Display Controller
WD90C30 High Performance Video Controller (max 1MB, 1024x768x256, 1024x768x16)
WD90C31 Accelerator Video Controller (max 1MB, 1024x768x256, 1280x1024x16)
WD90C33 Same as WD90C31 but with, max 2MB, VESA-LB, 1280x1024x256, 1280x1024x16)
WD90C55 VGA LCD Interface
WD90C56 VLBI (Video Local Bus Interface), for WD90C30/31, VESA not mentioned.
WD9710 Pipelined, 32bit core, 64bit RAM, 24bit RAMDAC, PCI/VLB
WD9712 similar to WD9710
STORAGE DEVICES
WD10C01A Winchester Disk Controller
WD10C27 Data Separator
WD33C92A Enhanced SCSI Bus Interface Controller
WD33C93B Enhanced SCSI Bus Interface Controller
WD33C95A, WD33C96A Enhanced Single-ended and Differential SCSI Bus Interface Controller
WD37C65C Floppy Disk Subsystem Controller Device
WD42C22C Winchester Disk Subsystem Controller Device
WD60C318 Optical Disk Drive Encoder/Decoder
WD60C40A Peripheral Cache Manager Device
WD60C80 Error Detection and Correction Chip (EDAC)
WD61C23A High Performance Hard Disk Controller
WD61C40A Peripheral Cache Manager Device
WD7000 ESDI Controller (16-bit ISA)
WD7193 Fast SCSI-II PCI adapter, 33C296A-ZX chip
WD7197 Fast Wide version of WD7193
WD7296A Fast Wide SCSI-II (PCI?), possibly WD34C296 chip
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