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**82485       Turbo Cache (and 485Turbocache)                      c90
***Notes:...
***Info:...
***Versions:...
***Features:
o   High Performance 
    - Zero Wait State Access on Cache Hit
    - One Clock Bursting 
    - Two-Way Set Associative 
    - Write Protect Attribute Per Tag
    - Start Memory Cycles in Parallel
o   Easy to Use
    - Matches Intel486 Microprocessor Bus Timing
    - Supports Invalidation Cycles
    - Maintains Memory on Writes
o   High Integration
    - Single Chip Tag RAM and Controller
    - No Logic Needed for CPU and Cache Connection
    - Maps Full 4 Gigabyte Address Space
o   Flexible System Configurations
    - Supports 64K or 128K Cache Memory
    - Supports Non-Cacheable Memory Areas

**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:
Chips:
[82454NX] (PXB) [82453NX] (MUX) 
[82452NX] (RCG) [82451NX] (MIOC) 
[82371EB] (PIIX4E),                            
CPUs:          Single/Dual/Quad P-II Xeon/P-III Xeon
DRAM Types:    FPM EDO 2-way Interleave 4-way Interleave
Mem Rows:      8
DRAM Density:  16Mbit 64Mbit
Max Mem:       8GB
ECC/Parity:    Both
AGP speed:     N/A
Bus Speed:     100
PCI Clock/Bus: 1/3


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