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**82489DX       Advanced Programmable Interrupt Controller    10/12/92
***Notes:...
***Info:...
***Versions:...
***Features:...
**82495DX/490DX DX CPU-Cache Chip Set                           <Sep91...
**82495XP/490XP Cache Controller / Cache RAM (for i860)       06/05/91
***Notes:...
***Info:
The Intel 82495XP cache controller and 82490XP cache RAM, when coupled
with a user-implemented memory  bus controller, provide a second-level
cache  subsystem  that eliminates  the  memory  latency and  bandwidth
bottleneck for  a wide  range of multiprocessor  systems based  on the
i860 XP  microprocessor. The CPU  interface is optimized to  serve the
i860  XP microprocessor  with zero  wait  states at  up to  50 MHz.  A
secondary cache  built from the  82495XP and 82490XP isolates  the CPU
from  the memory subsystem;  the memory  can run  slower and  follow a
different protocol than the i860 XP microprocessor.
         
***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...
**
**Later chipsets (basic spec):
**440 series:...
**450NX  (?)            06/29/98:...
**?????  (Profusion)    c:99...
**800 series...
*Headland/G2...
**HT25          3-volt Core Logic for 386SX                    c:Dec92
***Info:...
***Configurations:...
***Features:
o   25MHz operation at 2.7V to 3.6V
o   Extensive power management features
o   SMI support
o   Local Bus Interface
o   CPU clock control
o   16 general purpose I/O pins
o   2 programmable chip selects
o   44 event activity monitor
o   ISA bus refresh control
o   Up to 4 banks of 512Kb, 1 Mb and 4Mb DRAM
o   Flexible DRAM controller
o   Slow and Self refresh DRAM modes
o   Page mode DRAM accesses
o   DRAM page interleaving
o   4 register EMS
o   BIOS shadowing
o   Relocation for unused DRAM segments
o   PROM Write Enable for FLASH support
o   208 pin PQFP

**HT35          Single-Chip Peripheral Controller [partial info]     ?...
**HTK320        386DX Chip Set                                 c:Sep91...
**HTK340        "Shasta" 486 Chip Set                          c:Jun92...
**Support Chips:
**HT44          Secondary Cache                                c:Jun92...
**Other:...
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*Unresearched:...
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*General Sources:...