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**82395SX Smart Cache 12/17/90
***Notes:...
**82396SX Smart Cache 12/17/90...
**82485 Turbo Cache (and 485Turbocache) c90...
**82489DX Advanced Programmable Interrupt Controller 10/12/92...
**82495DX/490DX DX CPU-Cache Chip Set <Sep91
***Notes:
date source: none direct, however:
InfoWorld Jan 20, 1992 p98 - Compaq Deskpro 486/50L
mentions it has this chip
Network World Sep 2, 1991 p20 - Advert for new Compaq Deskpro 486/50L
mentions 256K cache
so assumed to be sometime before sept 1991.
Information taken from: 82495DX.pdf (Oct '92)
***Info:...
***Configurations:...
***Features:
o 50 MHz Intel486 DX CPU
- RISC Integer Core with Frequent Instructions Executing in One
Clock
- 160 Mbyte/Sec Burst Bus
- 41 Dhrystone MIPs
- 11.5M Double Precision Whetstones/Sec.
- On-Chip Cache and FPU
o Highly Flexible
- Supports 128 Kbyte and 256 Kbyte Configurations
- Complete MESI Protocol Support
- 32- or 64-Bit Memory Bus Width
- Synchronous, Asynchronous, and Strobed Memory Bus Protocols
- Variable Cache Line Sizes and Sectoring
- Cache Data Parity Option
o High Performance Second Level Cache
- Two-Way Set Associative
- Write-Back or Write Through Cache
- Zero Wait State Cache Access
- Concurrent CPU Bus, Memory Bus, and Internal Array Operation
o Full Multiprocessing Support
- Implements MESI Write-Back Cache Protocol
- Low Bus Utilization
- Automatically Maintains 1st Level Cache Consistency
- Supports Read-for-Ownership, Write-Allocation, and Cache-to-
Cache Transfers
**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...
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**WD7900/LP/LV System Chip Set for 80286 or 80386SX (Cache) <11/25/91
***Notes:...
***Info:...
***Configurations:...
***Features:...
**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...
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