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**82495XP/490XP Cache Controller / Cache RAM (for i860)       06/05/91
***Notes:...
***Info:...
***Features:...
**82496/491     Cache Controller / Cache RAM (for P5 Pentium) 03/22/93...
**82497/492   Cache Controller / Cache RAM (for P54 Pentium)    <Nov94...
**82498/493   Cache Controller / Cache RAM (for P54 Pentium)    <Nov94...
**
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**450NX  (?)            06/29/98:...
**?????  (Profusion)    c:99...
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**5596/5513      (Genesis) Pentium PCI Chipset               <03/26/96
***Info:
The SiS5596/5513  with built-in VGA controller is  a two-chip solution
for Pentium PCI/ISA system. A portion  of on board DRAM is shared with
the  built-in  VGA  controller.  In  that  way,  the  system  cost  is
substantially reduced.

The SiS5596/5513 two chips  solution for shared memory architecture is
achieved by  allowing both  GUI / VGA,  and System DRAM  controller to
control system memory. For  the shared memory application, the chipset
always acts  as the  arbiter of memory  bus masters. Whenever  the GUI
wants to  access the memory bus,  it requests the memory  bus from the
chipset first.  The chipset grants the  memory bus to the GUI, only if
the memory bus is not needed by the chipset. The chipset also supports
the two priority  scheme. Other important key features  such as direct
access frame buffer and memory access latency are also supported.

***Configurations:...
***Features:...
**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...
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*TI (Texas Instruments)...
**TACT84500   AT Chip Set (486, EISA) [no datasheet, some info]    c91
***Notes:
InfoWorld Oct 28, 1991 p38:
"...Unlike earlier EISA chip sets, Ti's Tact84500 is comprised of only
four VLSI chips for controlling the bus, memory, peripherals, and data
path unit. The Tact unit can also control eight EISA bus masters along
with DRAM and a single-layer  EISA-bus write buffer.  According to TI,
the suggested  price of the  EISA chip set,  at $130 in  quantities of
100, should  make EISA-based  systems price competitive  with existing
ISA-based systems."

At least one of the chips is called 84542. This is probably the memory
controller.



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