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**82497/492   Cache Controller / Cache RAM (for P54 Pentium)    <Nov94
***Notes:
Date source: 1995_Intel_Pentium_Processors_and_Related_Components.pdf

Information taken from: 
            1995_Intel_Pentium_Processors_and_Related_Components.pdf*
                                         8249x Cache controllers.pdf**
>*  Datasheet dated Nov'94
>** 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  and below have been sourced
from the second.

"Although the 82497 Cache Controller  is part of the Pentium processor
(735\90, 815\100, 1000\120, 1110\133) CPU-Cache Chip Set and the 82496
Cache  Controller is part  of the  Pentium Processor  (510\60, 567\66)
Chip  Set, the  two parts  are functionally  identical except  for the
differences noted in this section." - p491

Aside  from some  minor  differences in  pin  configuration, the  main
difference is the direct support  for 3.3V processors. This chipset is
still a 5V part. The cache operates at bus speed, max 66MHz.


This  chip was  used on  the Pentium  90MHz CPU  complexes of  Intel's
Xpress  platform.   Specifically  the BXCPUPENT90  (Single  90MHz,  16
82492s). Also found on IBM 9595/Server 500 Pentium 90MHz complexes.

***Info:...
***Configurations:...
***Features:...
**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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**SL9352   80386DX System and Memory Controller              <06/12/90
***Info:...
***Versions:...
***Features:...
**SLXXXX   Other chips...
**
**VT82C470     "Jupiter", Chip Set (w/o cache) 386 [no datasheet]    ?
**VT82C475     "Jupiter", Chip Set (w/cache) 386   [no datasheet]    ?
**VT82C486/2/3 "GMC chipset"            [no datasheet, some info]    ?...
**VT82C495/480 "Venus" Chip Set                    [no datasheet]    ?
**VT82C495/491 ? EISA Chip Set          [no datasheet, some info]  <93...
**VT82C496G    Pluto, Green PC 80486 PCI/VL/ISA System       <05/30/94...
**VT82C530MV   3.3V Pentium chipset [no datasheet, some info]<05/30/94...
**VT82C570M    Apollo Master, Green Pentium/P54C             <06/22/95...
**VT82C580VP   Apollo VP,  Pentium/M1/K5 PCI/ISA System      <02/15/96...
**VT82C580VPX  Apollo VPX, VPX/97, Pentium with 66/75MHz Bus <01/09/97...
**VT82C590     Apollo VP2, VP2/97, Single-Chip Pentium 66MHz <01/10/97...
**VT82C597/AT  Apollo VP3, Single-Chip for Pentium with AGP  <10/03/97...
**VT82C598MVP  Apollo MVP3,Single-Chip 66/75/83/100MHz & AGP <09/22/97...
**VT8501       Apollo MVP4,Single-Chip 66-100MHz & AGP       <11/04/98...
**VT82C680     Apollo P6, Pentium-Pro Chip Set               <08/30/96...
**Support chips:
**VT82C505     Pentium/486 VL to PCI Bridge                  <05/30/94
***Info:...
***Versions:...
***Features:
o   VL to PCI Bridge
    - Combined with VT82C486 or VT82C496G for 80486SX/DX/DX2/DX4 based 
      PCI/VL/ISA Green-PC systems
    - Combined with VT82C530MV chip set for Pentium/P54C/M1 based 
      PCI/VL/ISA Green-PC Systems
o   Sophisticated Bridging Capabilities
    - Supports PCI master to PCI slave cycles
    - Supports PCI master to VL bus slave, system memory and ISA 
      slave cycles
    - Supports VL master including CPU to PCI slave cycles
    - Supports ISA master to VL or PCI slave cycles
    - Supports multiple accelerated decoding schemes from VL master 
      including CPU to PCI and ISA slaves
    - Supports CPUs with write-back level-one cache
    - Concurrent CPU and PCI operation
    - 4 level of CPU/VL to PCI post write buffers
    - Automatic detection of data streaming burst cycles from CPU/VL 
      to PCI bus
    - 4 level of post write buffers from PCI master to VL slave, 
      system memory and ISA slaves
    - 4 level of prefetch buffers from system memory for access by PCI 
      masters
    - Bursting capability for both PCI and CPU/VL bus
o   Intelligent PCI Interface
    - PCI 2.0 compliant
    - Synchronous or divide-by-two CPU clock
    - Hidden arbitration for up to four PCI masters
    - Supports PCI preemption and time-out function
    - Supports PCI master and slave initiated abort mechanism
    - Supports PCI lock function
    - Supports data parity generation for PCI master read cycles
    - Supports data parity checking for PCI master write cycles
    - Supports parity error and system error reporting on the PCI bus
    - Supports PCI configuration cycles
    - Interrupt steering and conversion to edge triggering for ISA 
      compatibility
o   PCI Compliant IO Characteristics
o   0.8um high speed and low power CMOS process
o   160pin PQFP package

**VT82C586/A/B PCI Integrated Peripheral Controller          <10/13/96...
**VT82C596/A   Mobile PCI Integrated Peripheral Controller   <11/05/97...
**VT82C686A/B  PCI Super-I/O Integrated Peripheral Ctrl.     <02/10/98...
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