[Home] [This version is outdated, a new version is here]
*Title...
*Search:...
*Read Me/FAQ/General Info...
**A note on VESA support of 486 chipsets.
Many chipsets state  that they support VESA local  bus.  In some cases
these actually  implement VLB somewhat  like PCI, where it  is entirly
decoupled from the CPU bus. Chipsets  that do not state they work with
VLB,  may  be found  on  motherboards  that  contain VLB  slots.   VLB
is  *basically*  The 486  CPU  pinout in  a  slot  form. Unless  these
m/boards contain  some additional  chips, there VLB  implementation is
directly coupled to the CPU.

**Datasheets:...
*_IBM...
*ACC Micro...
*ALD...
*ALi...
*AMD . . . . . . . [no datasheets, some info]...
*Chips & Technologies...
*Contaq  . . . . . [no datasheets, some info]...
*Efar Microsystems [no datasheets, some info]...
*ETEQ...
*Faraday...
*Forex . . . . . . [List only, no datasheets found]...
*Intel...
**82496/491     Cache Controller / Cache RAM (for P5 Pentium) 03/22/93
***Notes:...
***Info:...
***Configurations:...
***Features:...
**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...
*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:...