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**82497/492   Cache Controller / Cache RAM (for P54 Pentium)    <Nov94
***Notes:...
***Info:
The 82497 Cache Controller and multiple 82492 Cache SRAMs combine with
the Pentium processor  (735\90, 810\100) to form a  CPU Cache chip set
designed for high performance servers and function-rich desktops.  The
high-speed interconnect between the  CPU and cache components has been
optimized to  provide zero-wait state  operation. This CPU  Cache chip
set  is fully  compatible with  existing  software, and  has new  data
integrity features for mission critical applications.

The 82497 cache controller implements the MESI write-back protocol for
full multiprocessing support. Dual  ported buffers and registers allow
the 82497  to concurrently  handle CPU bus,  memory bus,  and internal
cache operation for maximum performance.

The  82492 is a  customized high-performance  SRAM that  supports 32-,
64-, 128-bit wide memory bus widths, 16-, 32-, and 64-byte line sizes,
and optional sectoring.  The data path between the  CPU bus and memory
bus  is separated  by the  82492, allowing  the CPU  bus  to handshake
synchronously,  asynchronously,  or   with  a  strobed  protocol,  and
allowing concurrent CPU bus and memory bus operations.

***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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**5595       Pentium PCI System I/O                          <12/24/97
***Notes:...
***Info:...
***Versions:...
***Features:...
**950        LPC I/O                                         <07/16/99...
**Other:...
**PII/III/Pro...
**Athlon etc...
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*UMC...
**UM82C480     386/486 PC Chip Set                                 c91
***Info:
The UMC82C480  is a highly  integrated, IBM PC/AT compatible  chip set
for  high performance  80386/80486  based  personal computer  systems.
Built with  exquisite [yes  it really says  that] cache  controller in
advanced   1.0um   CMOS   technology,  UM82C481   (Integrated   Memory
Controller, IMC),  UM82C482 (Integrated System Controller,  ISC), with
UM82C206 (Integrated  Peripheral Controller, IPC), and  limited counts
of  commercial parts  constitute  a low  cost,  highly reliable,  full
advanced feature personal computer system.

The UM82C482,  Integrated System  Controller (ISC),  is part  of UMC's
high  performance 80386/80486  PC/AT  chip set.   It  contains AT  bus
control  logic, data  bus  conversion logic,  CPU  reset logic,  clock
generation  for  CPU,  keyboard   and  timer,  DMA/refresh  logic  and
peripheral  interface logic.   Incorporated with  UM82C481, integrated
Memory   Controller  (IMC),   and   UM82C206,  Integrated   Peripheral
Controller (IPC),  ISC provides  system control functions  for overall
PC/AT computer system.

The UM82C481,  Integrated Memory  Controller (IMC),  is part  of UMC's
high performance 80386/80486 PC/AT chip set. It contains sophisticated
direct-mapped  cache controller  with write  back operation,  and fast
page  mode DRAM  controller.  Incorporated  with UM82C482,  Integrated
System   Controller  (ISC),   and   UM82C206,  Integrated   Peripheral
Controller (IPC), IMC provides main memory management function for the
PC/AT computer system.



***Configurations:...
***Features:...
**UM82C493/491 ??????????????? [no datasheet]                        ?...
**UM8498/8496  486 VL Chipset  "Super Energy Star Green"[no dsheet]c94...
**UM8881/8886  HB4 PCI Chipset "Super Energy Star Green"[no dsheet]c94...
**UM8890       Pentium chipset [no datasheet]                        ?...
**
**Support Chips:
**UM82152      Cache Controller (AUStek A38152 clone)              <91...
**UM82C852     Multi I/O For XT                                    <91...
**UM82C206     Integrated Peripheral Controller                    <91...
**UM82c45x     Serial/Parallel chips                                 ?...
**Other chips:...
*Unresearched:...
*VIA...
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*ZyMOS...
*General Sources:...