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**82498/493   Cache Controller / Cache RAM (for P54 Pentium)    <Nov94
***Notes:...
***Info:
The 82498 Cache Controller and multiple 82493 Cache SRAMs combine with
the Pentium processor (735/90,  815/100) and future Pentium Processors
to form a CPU Cache chip set designed for high performance servers and
function-rich  desktops. The high-speed  interconnect between  the CPU
and  cache components has  been optimized  to provide  zero-wait state
operation. This CPU  Cache chip set is fully  compatible with existing
software,  and has new  data integrity  features for  mission critical
applications.

The 82498 Cache Controller implements the MESI write-back protocol for
full multiprocessing support.  Dual ported buffers and registers allow
the 82498  to concurrently  handle CPU bus,  memory bus,  and internal
cache operation for maximum performance.

The 82493 is a customized high-performance SRAM that supports 64-, and
128-bit  wide memory  bus widths,  32-,  and 64-byte  line sizes,  and
optional sectoring. The  data path between the CPU  bus and memory bus
is  separated  by  the  82493,  allowing  the  CPU  bus  to  handshake
synchronously,  asynchronously,  or   with  a  strobed  protocol,  and
allowing concurrent CPU bus and memory bus operations.

***Configurations:...
***Features:...
**
**Later chipsets (basic spec):
**440 series:...
**450NX  (?)            06/29/98:...
**?????  (Profusion)    c:99...
**800 series...
*Headland/G2...
*HMC (Hulon Microelectronics)...
*Logicstar...
*Motorola...
*OPTi...
**82C596/597     PTMAWB Pentium Adaptive Write-back (Cobra)       c:93
***Notes::...
***Info:...
***Configurations:...
***Features:...
**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...
*Western Digital...
*Winbond...
**W86C450/P Universal Asynchronous Receiver/Transmitter         <Jul89
***Info:...
***Versions:...
***Features:
o   Easily interfaces to most popular microprocessors.
o   Adds or deletes standard asynchronous communication bit (start, 
    stop, and parity) to or from serial data stream.
o   Holding and shift registers eliminate the need for precise 
    synchronization between the CPU and the serial data.
o   Independently controlled transmit, receive, line status, and data 
    set interrupts.
o   Programmable baud generator allow division of any input clock by 1 
    to (2^16 - 1) and generates the internal 16x clock.
o   Independent receiver clock input.
o   MODEM control functions (CTS, RTS. DSR, DTR, RI, and DCD).
o   Fully programmable serial-interface characteristics:
    - 5, 6, 7, or 8-bit characters
    - Even, odd, or no-parity bit generation and detection
    - l, 1.5 or 2-stop bit generation.
    - Baud generation (DC to 56K baud). 
o   False start bit detection.
o   Complete status reporting capabilities.
o   TRl-STATE TTL drive capabilities for bidirectional data bus and 
    control bus.
o   Line break generation and detection.
o   Internal diagnostic capabilities:
    - Loopback controls for communications link fault isolation.
    - Break, parity, overrun, framing error simulation.
o   Fully prioritized interrupt system controls.


**W86C451   I/O controller for IBM PC/AT/XT                     <Jul89...
**W86C452   I/O controller for IBM PC/AT                         Jul89...
**W86C456   I/O controller [no datasheet]                            ?
**W860551/P UART with FIFO and Printer Port Controller             <94...
**
**Other:...
*ZyMOS...
*General Sources:...