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**82496/491     Cache Controller / Cache RAM (for P5 Pentium) 03/22/93
***Notes:
Date source: TimelineDateSort7_05.pdf

Information taken from: 
            1995_Intel_Pentium_Processors_and_Related_Components.pdf*
                                         8249x Cache controllers.pdf**

>*  Datasheet dated Oct'93
>** Datasheet undated, whole document dated '95

The info and features section have  been solely sourced from the first
source.   The  second source  provides  far  more detail.   Additional
information in  the configurations section  has been sourced  from the
second.

This  chip was  used on  the Pentium  66MHz CPU  complexes of  Intel's
Xpress platform.   Specifically the  BXCPUPENT66 (Single  66MHz, eight
82491s) and BXCPU2XPENT (Dual 66 MHz,  eight 82491s). Also found on P5
60/66MHz CPU complexes of IBM 9595/PC Server 300/500 systems.

***Info:...
***Configurations:...
***Features:...
**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
Chips:         
Memory Access Controller (MAC)  
Data Interface Buffer (DIB)
CPUs:          8x P-III Xeon Oct
DRAM Types:    SDRAM PC100 2-way Interleave dual channel
Max Mem:       32GB
ECC/Parity:    ECC
AGP speed:     N/A
Bus Speed:     100
PCI Clock/Bus: 1/3 PCI-66/64



**800 series...
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**Other chips:
***Video:
UM487            HCGA Controller
UM587            VGA Controller
UM6845/A/B       CRT Controller
UM6845R/RA/RB    CRT Controller
UM6845E/EA/EB    CRT Controller
UM70C171/-50/-65 Color Palette with Triple 6-Bit DAC
UM8321		 CRT Controller
UM8312		 CRT Controller
UM9007 		 CRT Controller

No datasheet for these, not sure if some exist:
UM84C408    VGA 1MB
UM85C408AF  VGA 1MB?
UM85C418    ?
UM86C408    VGA? 1MB
UM86C418    VGA? 1MB, + IDE controller
UM8710      VGA, PCI, 32bit RAM
UM9502      25-80MHz clock chip
UM70C171    6bit DAC
UM70C178    15/16bit DAC, similar to Sierra Mark3
UM70C188    24bit DAC

***Disk:...
***Peripheral:...
***Other:...
*Unresearched:...
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*VLSI...
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*Winbond...
*ZyMOS...
*General Sources:...