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**82371MX     Mobile PCI I/O IDE Xcelerator (MPIIX)           11/01/95
***Notes:...
***Info:
The 82371MX PCI I/O IDE Xcelerator (MPIIX) provides the bridge between
the PCI bus and the  ISA-like Extended I/O expansion bus. In addition,
the  82371MX  has an  IDE  interface  that  supports two  IDE  devices
providing  an interface  for IDE  hard disks  and CD  ROMS.  The MPIIX
integrates many common  I/O functions found in ISA  based PC systems-a
seven-channel DMA controller, two 82C59 interrupt controllers. an 8254
timer/counter, Intel  SMM power management support,  and control logic
for NMI  generation. Chip select  decoding is provided for  BIOS, real
time  clock,  and   keyboard  controller.  Edge/Level  interrupts  and
interrupt steering are supported for PCI plug and play compatibility.

The MPIIX also  provides the Extended I/O Bus  for a direct connection
to  Super   I/O  devices   providing  a  complete   PC-compatible  I/O
solution.  MPIIX also  provides support  for the  “Mobile  PC/PCI" DMA
Expansion protocol that enables the implementation of Docking Stations
with  full ISA and  PCI capability  without running  the full  ISA bus
across   the   docking    connector.   For   motherboard   Plug-n-Play
compatibility.   the  82371MX  also   provides  three   steerable  DMA
channels. up  to three steerable  interrupt lines, and  a programmable
chip select. The interrupt lines can be routed to any of the available
ISA interrupts.

The MPIIX’s power management function supports SMI# interrupt sources,
extensive clock control  (including Auto Clock Throttling), peripheral
power  idle detection  with access  traps. system  Suspend-to-DRAM and
Suspend-to-Disk.

***Versions:...
***Features:...
**82371AB     PCI-TO-ISA / IDE Xcelerator 82371AB (PIIX4)     02/17/97...
**82374/82375 PCI-EISA Bridge (82374EB/82375EB, 374SB/375SB)   c:Mar93...
**82378       System I/O (SIO) (82378IB and 82378ZB)           c:Mar93...
**82379AB     System I/O-APIC (SIO.A)                           <Dec94...
**82380       32-bit DMA Controller w/ Integrated Peripherals 02/01/87...
**82380FB/AB  PCIset: 82380FB Mobile PCI-to-PCI Bridge(MPCI2) 02/17/97...
**82384       Clock Generator and Reset Interface                  c86...
**82385       32-bit Cache Controller for 80386               09/29/87...
**82385SX     32-bit Cache Controller for 80386SX             01/25/89...
**82395DX     High Performance Smart Cache                    06/18/90...
**82395SX     Smart Cache                                     12/17/90...
**82396SX     Smart Cache                                     12/17/90...
**82485       Turbo Cache (and 485Turbocache)                      c90...
**82489DX       Advanced Programmable Interrupt Controller    10/12/92...
**82495DX/490DX DX CPU-Cache Chip Set                           <Sep91...
**82495XP/490XP Cache Controller / Cache RAM (for i860)       06/05/91...
**82496/491     Cache Controller / Cache RAM (for P5 Pentium) 03/22/93...
**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...
*Headland/G2...
**HT35          Single-Chip Peripheral Controller [partial info]     ?
***Notes:...
**HTK320        386DX Chip Set                                 c:Sep91...
**HTK340        "Shasta" 486 Chip Set                          c:Jun92...
**Support Chips:
**HT44          Secondary Cache                                c:Jun92...
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