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**82498/493   Cache Controller / Cache RAM (for P54 Pentium)    <Nov94
***Notes:...
***Info:
The 82498 Cache Controller and multiple 82493 Cache SRAMs combine with
the Pentium processor (735/90,  815/100) and future Pentium Processors
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 82498 Cache Controller implements the MESI write-back protocol for
full multiprocessing support.  Dual ported buffers and registers allow
the 82498  to concurrently  handle CPU bus,  memory bus,  and internal
cache operation for maximum performance.

The 82493 is a customized high-performance SRAM that supports 64-, and
128-bit  wide memory  bus widths,  32-,  and 64-byte  line sizes,  and
optional sectoring. The  data path between the CPU  bus and memory bus
is  separated  by  the  82493,  allowing  the  CPU  bus  to  handshake
synchronously,  asynchronously,  or   with  a  strobed  protocol,  and
allowing concurrent CPU bus and memory bus operations.

***Configurations:...
***Features:...
**
**Later chipsets (basic spec):
**440 series:...
**450NX  (?)            06/29/98:...
**?????  (Profusion)    c:99...
**800 series...
*Headland/G2...
*HMC (Hulon Microelectronics)...
*Logicstar...
*Motorola...
*OPTi...
*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
*SIS...
**5591/5592/5595 (David)   Pentium PCI A.G.P. Chipset        <01/09/98
***Info:
The SiS5591/5592  SiS5595 glueless P5  A.G.P. chipset provides  a high
performance/cost index  Desktop/Mobile solution for  the Intel Pentium
P54C/P55C, AMD K5/K6, and Cyrix M1/M2 A.G.P. system.

The SiS5591/SiS5592  A.G.P./PCI controller integrated  the Host-to-PCI
bridge, the L2 cache  controller, the DRAM controller, the Accelerated
Graphics  Port interface,  and the  PCI IDE  controller. The  L2 cache
controller can  support up to 1  M P.B. SRAM, and  the DRAM controller
can  support EDO/FP/SDRAM memory  up to  768 MB  with optional  ECC or
parity check  function. The  A.G.P. 1.0 compliance  interface supports
both  1X, and  2X speed  mode with  sideband address  capability.  The
built-in fast  PCI IDE  controller supports the  ATA PIO/DMA,  and the
Ultra DMA/33 functionality.

SiS5591  and SiS5592  have some  pin-out switching  to  facilitate the
main-board layout.  SiS5591 pin  assignment is based  on the  ATX form
factor,  and  SiS5592  pin  assignment   is  based  on  the  NLX  form
factor. Beside  the pin-out switching, SiS5591 and  SiS5592 is totally
the same on the internal logic circuit.

The SiS5595 PCI  system I/O integrates the PCI-to-ISA  bridge with the
DDMA,  and  Serial  IRQ  capability,  the ACPI/Legacy  PMU,  the  Data
Acquisition  Interface, the Universal  Serial Bus  host/hub interface,
and the ISA  bus interface which contains the  ISA bus controller, the
DMA controllers,  the interrupt controllers,  and the Timers.  It also
integrates the Keyboard controller, and the Real Time Clock (RTC). The
built-in USB controller,  which is fully compliant to  OHCI (Open Host
Controller  Interface),  provides two  USB  ports  capable of  running
full/low speed USB devices.  The Data Acquisition Interface offers the
ability of monitoring and reporting the environmental condition of the
PC. It could  monitor 4 positive analogue voltage  inputs, 2 Fan speed
inputs, and one temperature input.


***Configurations:...
***Features:...
**5596/5513      (Genesis) Pentium PCI Chipset               <03/26/96...
**5597/5598      (Jedi)    Pentium PCI/ISA Chipset           <04/15/97...
**530/5595       (Sinbad) Host, PCI, 3D Graphics & Mem. Ctrl.<11/10/98...
**540            (Spartan) Super7 2D/3D Ultra-AGP Single C.S.<11/30/99...
**55x            SoC (System-on-chip)                        <03/14/02...
**
**Support chips:
**85C206     Integrated Peripheral Controller [no datasheet]         ?...
**5595       Pentium PCI System I/O                          <12/24/97...
**950        LPC I/O                                         <07/16/99...
**Other:...
**PII/III/Pro...
**Athlon etc...
*Symphony...
*TI (Texas Instruments)...
*UMC...
*Unresearched:...
*VIA...
*VLSI...
*Western Digital...
*Winbond...
*ZyMOS...
*General Sources:...