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*AMD . . . . . . . [no datasheets, some info]...
*Chips & Technologies...
*Contaq  . . . . . [no datasheets, some info]...
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*Intel...
**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...
*HMC (Hulon Microelectronics)...
*Logicstar...
*Motorola...
*OPTi...
**82C491/392     486WB PC/AT Chipset                         <04/21/91
***Info:
The OPTi  486WB is a three-chip solution  offering optimal performance
for high-end,  486-based AT systems.   The OPTi 486WB is  designed for
systems running from 33 Mhz, to 40  Mhz, and up to 50 Mhz and combines
three major functions: the 82C491 System Controller (SYSC), the 82C392
Data  Buffer Controller  (DBC), and  the 82C206  Integrated Peripheral
Controller (IPC).  Refer to the data book supplied by your third-party
source for information on the 82C206.

***Configurations:...
***Features:...
**82C493/392     486SXWB                                     <10/21/91...
**82C495SX/392SX LCWB PC/AT chipset [no datasheet]                   ?...
**82C495SLC      DXSLC 386/486 Low Cost Write Back                c:92...
**82C495XLC      PC/AT Chip Set                                   c:93...
**82c496A/B      DXBB PC/AT Chipset                             <Mar92...
**82C496/7       DXBB PC/AT Chipset (Cached)                 <01/16/92...
**82C498         DXWB PC/AT chipset [no datasheet]                   ?...
**82C499         DXSC DX System Controller                        c:93...
**82C546/547     Python PTM3V                                     c:94...
**82C556/7/8     Viper [no datasheet]                                ?...
**82C556/7/8N    Viper-N  Viper Notebook Chipset             <05/25/95...
**82C556M/7M/8E  Viper-N+ Viper Notebook Chipset                  c:96...
**82C566/7/8     Viper-Max Chipset Scalable MultiMedia PC Solution   ?...
**82C571/572     486/Pentium                                      c:93...
**82C576/7/8     Viper Xpress  [no datasheet]                        ?...
**82C576/8/9     Viper XPress+ [no datasheet, some info]     <01/16/97...
**82C596/597     PTMAWB Pentium Adaptive Write-back (Cobra)       c:93...
**82C650/1/2     Discovery (Pentium Pro) [no datasheet]              ?...
**82C681/2/6/7   386/486WB EISA                                   c:92...
**82C683         386/486AWB EISA [no datasheet]                      ?...
**82C693/6/7     Pentium uP Write Back Cache EISA                 c:93...
**82C700         FireStar                                         c:97...
**82C701         FireStar Plus                                    c:97...
**82C750         Vendetta      [no datasheet]                        ?...
**82c801         SCWB2 DX Single Chip Solution                    c:92...
**82C802         SCWB2 PC/AT Single Chip [no datasheet]              ?...
**82C802G/GP     System/Power Management Controller (cached)      c:93...
**82C895         System/Power Management Controller (cached)   c:Sep94...
**82C898         System/Power Management Controller (non-cache)c:Nov94...
**
**Support Chips:
**82C601/2       Buffer Devices                                 <Nov94...
**82C822         PCIB (VLB-to-PCI bridge)                         c:94...
**Other:...
*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
*SIS...
*Symphony...
*TI (Texas Instruments)...
*UMC...
*Unresearched:...
*VIA...
*VLSI...
**Other:
***VLX*XXX...
***VL16XXX
VL16C450  UART equivalent to VL82C50A but with, scratchpad register, and various improvements
VL16C451  UART equivalent to VL16C450 with Bidirectional Parallel port 
VL16C451B 'Enhanced' UART equivalent to VL16C450 with Bidirectional Parallel port 
VL16C452  2x UART otherwise equivalent to VL16C451
VL16C452B 'Enhanced'2x UART otherwise equivalent to VL16C451
VL16C550 UART same as VL16C450 but with 16 byte FIFO 
VL16C551 UART same as VL16C450 but with 16 byte FIFO (not NSC-compatible?)
VL16C552 UART same as VL16C452 but with 16 byte FIFO
VL16C554 UART same as VL16C552 but Quad
***VL65XXX...
***VL80XXX...
***VL82XXX...
***VL85XXX...
***VL86XXX...
***VXXXXXX...
**Not sure if they actually exist...
*Western Digital...
*Winbond...
*ZyMOS...
*General Sources:...