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**82495DX/490DX DX CPU-Cache Chip Set                           <Sep91
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**82495XP/490XP Cache Controller / Cache RAM (for i860)       06/05/91
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**FE3600/A/B/C  16/20MHz AT Chip set                              c:88
***Notes:...
***Info:
****General:
1.0 Introduction
This document  is the  Technical Specification/OEM Manual  for Western
Digital  Corporation's FE3600  chip  set.  This  manual describes  the
electrical, physical, and functional features in detail.

Applications
The FE3600  is a highly-integrated  chip set that allows  designers to
reduce  chip   count,  increase  flexibility,   and  provide  improved
operating speed and functionality for  a 16 MHz IBM "PC/AT" compatible
system board.  The FE3600 chip set is extremely cost effective because
it replaces  approximately 60% of the  components on a  typical IBM AT
motherboard and  results in decreased  size and power  consumption. In
addition,   the  FE3600   chip   set  devices   are  manufactured   in
surface-mountable packages  which allows for  a higher level  of logic
integration resulting  in an  extremely reliable device  that occupies
much less space.

1.1 Product Overview
The  FE3600 chip  set provides  all necessary  core logic  to  build a
totally  integrated IBM  AT  compatible motherboard  using the  16-bit
Intel 80286 Central Processing Unit (CPU). The FE3600 chip set is 100%
hardware (register level) and  software compatible with the IBM PC/AT.
The FE3600 chip set consists of four devices:

FE3001  AT CPU Control Logic
FE3010B AT Peripheral Control Logic
FE3021  AT Address Bus Buffer
FE3031  AT Data Bus Buffer

Each  of the  four  chips are  covered  in separate  sections of  this
manual. A  separate section is also provided  to describe applications
with  the  four  chips working  in  tandem  to  provide a  100%  PC/AT
compatible solution.

****FE3001  AT CONTROL LOGIC...
****FE3010B AT PERIPHERAL CONTROL LOGIC...
****FE3021  ADDRESS BUFFER AND MEMORY CONTROLLER...
****FE3031  AT DATA BUFFER...
***Configurations:...
***Features:...
**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]                                ?
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