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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...
*HMC (Hulon Microelectronics)...
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*OPTi...
**82C650/1/2     Discovery (Pentium Pro) [no datasheet]              ?
***Configurations:...
**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:
OPTi 82C200  - ChromaCast LCD-VGA chipset
OPTi 82C205  - LCD panel controller / scalar
OPTi 82C264  - 2D VGA controller
OPTi 82C265  - Video ????????????????????????????
OPTi 82C268  - Video ????????????????????????????
OPTi 82C611  - EIDE VLB
OPTi 82C611A - EIDE VLB
OPTi 82C621  - PCI-to-IDE controller
OPTi 82C621A - PCI-to-IDE controller 
OPTi 82C824  - FireFox PCI to PCMCIA Controller
OPTi 82C825  - FireBridge II PCI to PCMCIA Controller
OPTi 82C814  - Docking Station Controller for laptops (PCI-to-PCI bridge)
OPTi 82C842  - PCI-to-IEEE 1393 FireWire
OPTi 82C832  - ?????????????????????????????????????????
OPTi 82C861  - PCI-to-USB Bridge   c1997
OPTi 82C862  - PCI-to-USB Bridge 4x port
OPTi 82C863  - PCI-to-USB Bridge 2x port
OPTi 82C871  - PCI-to-USB Bridge + Sound Blaster compatibility and USB 2.0
OPTi 82C916  - Audio, ISA, serial CODEC) used in combination with Vendetta chipset 82C750
OPTi 82C924  - Audio, ISA
OPTi 82C925  - ISA Audio Controller (replaces the 924)
OPTi 82C928  - (MAD16) ISA Audio Controller (Emulates Sound Blaster Pro) c1993
OPTi 82C929  - (MAD16 Pro) ISA Audio Controller (Emulates Sound Blaster Pro) c1994
OPTi 82C930  - ISA Audio Controller (Emulates Sound Blaster Pro, AdLib)
OPTi 82C931  - ISA Audio controller (Emulates Sound Blaster Pro, AdLib)
OPTi 82C933  - Audio ?????????????????????????????
OPTi 82C935  - EV1935 ECTIVA MachOne PCI Audio
OPTi 82C941  - Wavetable chip, has something to do with 82C930
OPTi 82C950  - (MAD32) Audio/Modem controller (Emulates Sound Blaster Pro) c1994
OPTi 92C160  - Clock Generator for 92C168
OPTi 92C168  - LCD VGA controller c1993
OPTi 92C178  - LCD VGA controller with blt c1993
OPTi 92C264  - 2D VGA controller 

-------------------------------------------------


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*Winbond...
**W86C452   I/O controller for IBM PC/AT                         Jul89
***Info:
GENERAL DESCRIPTION

The W86C452 is an enhanced dual-channel version of the popular W86C450
asynchronous  communication element  (ACE) fabricated  using WINBOND'S
CMOS process.  It is  equivalent to VL160452  of the  VLSI Technology
Inc.

The  device   supports  two  serial-to-parallel   conversion  on  data
characters  received  from  a  peripheral  device  or  a  MODEM.   and
parallel-to-serial  conversion on  data characters  received  from the
CPU.

The CPU  can read the complete status  of the UART at  any time during
the  functional operation.  Status  information reported  includes the
type and condition  of the transfer operations being  performed by the
UART as  well as  any error conditions  (parity. overrun,  framing, or
break interrupt).

The UART includes  a programmable baud rate generator  that is capable
of dividing the timing reference clock input by divisors of l to (2^16
-1), and  producing a 16 x  clock for driving  the internal transmiter
logic. Provisions  are also included to  use this 16 x  clock to drive
the  receiver  logic.   The  UART includes  a  complete  MODEM-control
capability  and  a  processor-interrupt  system.   Interrupts  can  be
programmed  to  the  user’s  requirements,  minimizing  the  computing
required to handle the communications link.

In addition  to its communication interface  capabilities, the W86C452
provides the user with  a fully bidirectional parallel Centronics type
printer.  This part  allows  information received  from either  serial
communication port to be printed from the dual ACE.

***Versions:...
***Features:...
**W86C456   I/O controller [no datasheet]                            ?
**W860551/P UART with FIFO and Printer Port Controller             <94...
**
**Other:...
*ZyMOS...
*General Sources:...