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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...
**800 series...
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**85C206     Integrated Peripheral Controller [no datasheet]         ?
***Notes:...
**5595       Pentium PCI System I/O                          <12/24/97...
**950        LPC I/O                                         <07/16/99...
**Other:...
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**W83C553F    System I/O Controller With PCI Arbiter           c:sep95
***Info:...
***Versions:...
***Features:
High Integration PCI-ISA solution
o  Optimized for lowest system cost
o  Complies with PCI Revision 2.0 specification
o  Universal PCI device supporting x86 and PowerPC (non-x86) modes of 
   operation

Nand tree on most signal pins to facilitate board level testing in PCB 
manufacturing environment

Integrated PCI Bus Master IDE controller
o  Dual channel Bus Master IDE for up to 4 peripherals, including hard 
   drives, ATAPI (IDE) CD-ROMs, tapes, etc.
o  Multi-threading capability allows two simultaneous I/O processes
o  Independent IDE Timing registers allow fast/slow devices on the 
   same cable
o  Two independent DMA channels for Bus Master scatter/gather DMA 
   transfers across the PCI bus
o  Large 64 byte DMA FIFO for zero wait state PCI burst transfers
o  Support for multiword DMA Mode 1 (13.3 MB/s), Mode 2 (16.6 MB/s) 
   IDE drives
o  PIO IDE support for Modes 0-4 disks
o  Edge rate controlled outputs directly drive IDE headers
o  Four byte pre-fetch and posted write buffers
o  DMA channels can be re-configured for P-n-P motherboard devices
o  Software and register set compatible with Intel Bus Master PCI-IDE 
   specification (SFF 8038i)
o  Supported by existing device drivers for MS-DOS, Windows, NT 3.1, 
   NT 3.5x, NT4.0, OS/2 2.1, OS/2 Warp, NetWare 3.12 and 4.x**
o  Recompiled PowerPC device drivers also available

>** OS/2, Novell driver by DTC

PCI Arbiter
o  Supports CPU, IDE, ISA and five additional bus masters
o  Programmable access windows allow fine tuning of PCI access for 
   each bus master
o  Can be disabled on power-up via strapped pin

Power Management Break Event support for Green PC applications

Built-in Integrated Peripheral Controller (IPC) with standard PC-AT 
peripherals

o  Two 82C37A DMA controllers (types A, B, and F)
   - 32-bit addressing allows use of alternate CPUs, such as PowerPC
   - supports multiple 8-bit and 16-bit scatter/gather DMA channels
o  Two 82C59A interrupt controllers
   - all IRQ inputs may be programmed for edge or level sensitivity
o  One 82C54 counter/timer
o  Routes external PCI interrupts to a software-selectable interrupt 
   channel

PCI Bus Interface
o  PCI Revision 2.1 compliant
o  PCI clock frequencies up to 33 MHz at 5V
o  Supports delayed completion for ISA cycles
o  Active address decoding for internal I/O devices
o  Subtractive decoding for ISA bridge, KBC and RTC
o  Supports disconnection (with retry) for slow internal accesses to 
   improve latency
o  Short PCI bus ownership when mastering to minimize overall system 
   latency
o  Fast DMA transfers from I/O devices to PCI agents as a master
o  Separate request and grant signals for ISA DMA and IDE controllers

ISA Bus Bridge
o  Full implementation of a standard ISA bus
o  Separate ISA and IDE data buses reduce noise and increase system 
   performance
o  Synchronous PCI-to-ISA interface with direct drive for 5 ISA slots

XD-Bus interface
o  Support for BIOS ROM or PowerPC systems boot ROM
o  Support for flash EPROM
o  Provides keyboard controller connections
o  Provides real-time clock connections
o  Provides data buffer control

Miscellaneous
o  Port B support
o  Port 92 support

Uses  0.6um, ultra-low  power CMOS  technology for  Rev. E  and below;
0.5um for Rev. G.  Packaged in a 208-pin PQFP package

**W83628F/29D PCI TO ISA Bridge Set                                c98...
**W83626F/D   LPC TO ISA Bridge Set                                <00...
**
**Multi I/O:
**W83757          SUPER I/O  CHIP                                  <92...
**W83767F         ??           Multi I/O  [no datasheet]
**W83777F/87F     Power I/O   (Multi I/O)                          <95...
**W83877F         WINBOND I/O (Multi I/O)                          <96...
**W83877TF/TG/TD  WINBOND I/O (Multi I/O)                          c97...
**W83977F/G/AF/AG WINBOND I/O (Multi I/O)                          c97...
**W83977TF        WINBOND I/O (Multi I/O)                          c97...
**W83977EF        WINBOND I/O (Multi I/O)                          <98...
**W83977ATF       WINBOND I/O (Multi I/O)                          <98...
**
**Disk Controller:
**W83759/A/F/AF   Advanced VL-IDE Disk Controller                  <96...
**W83769          Local Bus IDE Solution                           <94...
**
**UARTS:
**W86C250A  UART (equivalent of INS8C250A) [no datasheet]
**W86C450/P Universal Asynchronous Receiver/Transmitter         <Jul89...
**W86C451   I/O controller for IBM PC/AT/XT                     <Jul89...
**W86C452   I/O controller for IBM PC/AT                         Jul89...
**W86C456   I/O controller [no datasheet]                            ?
**W860551/P UART with FIFO and Printer Port Controller             <94...
**
**Other:...
*ZyMOS...
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