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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...
**
**Later chipsets (basic spec):
**440 series:...
**450NX  (?)            06/29/98:...
**?????  (Profusion)    c:99...
**800 series...
*Headland/G2...
**HT22          386SX/286 Single Chip (25 MHz)                 c:Sep91
***Info:...
***Configurations:...
***Features:
o   Single Chip 803868X/286 PC/AT Compatible Solution for CPU Clock 
    Speeds to 2SMHz
o   SX Mode or 286 Mode
o   Supports up to 20 MB DRAM using 4M, 1M or 256K Devices in by 1 
    or 4 configuration
o   Page Mode and 2-Way Interleaving
o   LIM EMS 4.0 Support in Hardware using 2 Sets of 32 EMS Registers
o   8-Bit or 16-Bit BIOS Support
o   High Performance DRAM Multiplexed Interleave Mode
o   Asynchronous AT Bus Clock
o   Supports up to 12 MHz Backplane Operation
o   Programmable DRAM Timing
o   Port 92 Alternate GATEA20 and Hot Reset
o   Shadow RAM support over entire 640K to 1M range in 16K increments
o   BIOS Shadow support in 64K increments
o   Built-in Sleep Mode
o   Three-state control pins for board level testing
o   HCMOS Technology

**HT25          3-volt Core Logic for 386SX                    c:Dec92...
**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:...
*HMC (Hulon Microelectronics)...
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*Unresearched:...
*VIA...
*VLSI...
**VL82C108 TOPCAT Combination I/O chip                               ?
***Info:
The VL82C108 Combo  chip replaces with a single  100-pin chip, several
of   the   commonly  used   peripherals   found  in   PC/AT-compatible
computers. This  chip, when used with VLSI  PC/AT-compatible chip set,
allows designers to implement a very cost-effective minimum chip count
motherboard containing functions that are common to virtually all PCs.

The on-chip UART  is completely software compatible  with the VL16C450
ACE.

The bidirectional  parallel port  provides a PS/2  software compatible
interface between  a Centronics-type printer and  the VL82C108. Direct
drive is provided so that all  that is needed to interface to the line
printer is  a resistor/  capacitor network. the  bidirectional feature
(option) is software programmable for backwards PC/AT-compatibility.

The  keyboard/mouse  controller  is  selectable  as  PC/AT-  or  PS/2-
compatible.

Included  is  the control  logic  necessary  for  the support  of  the
Integrated Drive Electronics (IDE) hard  disk bus interface. Hard disk
drives which support the IDE interface often refer to the interface as
"AT Bus" compatible or "Embedded AT Bus" compatible.

The  Combo I/O  chip also  includes  selectable chip  selects for  the
internal  UART and  printer port,  and  four fixed  chip selected  for
external floppy and hard disk controllers.

***Versions:...
***Features:...
**VL82C110 Combination I/O chip                                      ?...
**VL82C113 SCAMP  Combination I/O chip                               ?...
**VL82C114 Combination I/O chip                                      ?...
**Video: ...
**Disk:...
**Modems:...
**Other:...
**Not sure if they actually exist...
*Western Digital...
*Winbond...
*ZyMOS...
*General Sources:...