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**HT18          80386SX Single Chip                            c:Sep91
***Info:...
***Configurations:...
***Features:
o   Highly Integrated, Single Chip 80386SX AT Compatible Solution
o   Special Multiple Context Hardware EMS Support (LIM 4.0 compatible) 
    using 2 sets of 32 EMS Registers
o   Single or Dual BIOS
o   Shadow RAM support over entire C0000 to DFFFF Address range in 16K 
    increments, E0000 to FFFFF in 64K increments
o   Page Mode and 2-way Interleaving
o   Supports up to 12MHz AT Bus Clock
o   High Performance Muxed DRAM Interleave
o   Programmable DRAM timing
o   Asynchronous AT Bus Clock
o   Three-State Test Mode
o   16-Bit ROM BIOS Support

HT 18A/B Special Features
o   16 and 20 MHz CPU Clock Speeds
o   Supports up to 8M CPU Memory using combinations of 64K, 256K and 
    1M Devices
o   4 Bank, 4-way Interleave Mode

HT18C/25MHz Special Features
o   16, 20 and 25MHz CPU Clock Speeds
o   Supports up to 20M with EMS CPU Memory using combinations of 256K, 
    1M and 4M Devices

**HT21          386SX/286 Single Chip (20 MHz)                 c:Aug91
***Info:...
***Configurations:...
***Features:...
**HT22          386SX/286 Single Chip (25 MHz)                 c:Sep91...
**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)...
*Logicstar...
*Motorola...
*OPTi...
*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
*SIS...
**5120           Pentium PCI/ISA Chipset (Mobile)            <01/28/97
***Info:...
***Versions:...
***Features:...
**5501/5502/5503 Pentium/P54C PCI/ISA Chipset                <04/02/95...
**5511/5512/5513 Pentium PCI/ISA                             <06/14/95...
**5571           (Trinity) Pentium PCI/ISA Chipset (75MHz)   <12/09/96...
**5581/5582      (Jessie)  Pentium PCI/ISA Chipset (75MHz)   <04/15/97...
**5591/5592/5595 (David)   Pentium PCI A.G.P. Chipset        <01/09/98...
**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...
**VT82C496G    Pluto, Green PC 80486 PCI/VL/ISA System       <05/30/94
***Info:...
***Configurations:...
***Features...
**VT82C530MV   3.3V Pentium chipset [no datasheet, some info]<05/30/94...
**VT82C570M    Apollo Master, Green Pentium/P54C             <06/22/95...
**VT82C580VP   Apollo VP,  Pentium/M1/K5 PCI/ISA System      <02/15/96...
**VT82C580VPX  Apollo VPX, VPX/97, Pentium with 66/75MHz Bus <01/09/97...
**VT82C590     Apollo VP2, VP2/97, Single-Chip Pentium 66MHz <01/10/97...
**VT82C597/AT  Apollo VP3, Single-Chip for Pentium with AGP  <10/03/97...
**VT82C598MVP  Apollo MVP3,Single-Chip 66/75/83/100MHz & AGP <09/22/97...
**VT8501       Apollo MVP4,Single-Chip 66-100MHz & AGP       <11/04/98...
**VT82C680     Apollo P6, Pentium-Pro Chip Set               <08/30/96...
**Support chips:
**VT82C505     Pentium/486 VL to PCI Bridge                  <05/30/94...
**VT82C586/A/B PCI Integrated Peripheral Controller          <10/13/96...
**VT82C596/A   Mobile PCI Integrated Peripheral Controller   <11/05/97...
**VT82C686A/B  PCI Super-I/O Integrated Peripheral Ctrl.     <02/10/98...
**Later P-Pro/II/III/Celeron...
**Later AMD...
**Other...
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*Western Digital...
*Winbond...
*ZyMOS...
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