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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...
**W83777F/87F Power I/O (Multi I/O) <95
***Info:
GENERAL DESCRIPTION
The W83777F/W83787F integrates a disk drive adapter, serial port
(UART), parallel port, IDE bus interface, and game port decoder onto a
single I/O chip. The W83777F/W83787F is an enhanced version of the
W83767F Power l/O chip. The enhanced functions include one 2.88MB
floppy disk controller (W83777F only), two 16550 compatible UARTs, and
one parallel port with EPP mode, ECP mode, and joystick mode.
The disk drive adapter functions of the W83777F/W83787F include a
floppy disk drive controller compatible with the industry standard
82077/765, data separator, write pre-compensation circuit, decode
logic, data rate selection, clock generator, drive interface control
logic, and interrupt and DMA logic. The wide range of functions
integrated onto the W83777F/W83787F greatly reduces the number of
components required for interfacing with floppy disk drives. The
W83777F/W83787F supports four 360K, 720K, 1.2M, 1.44M, or 2.88M
(W83777F only) disk drives and data transfer rates of 250KB/S,
300KB/S, 500KB/S, and 1MB/S (W83777F only).
There are two high-speed serial communication ports (UARTs) on the
W83777F/W83787F. The UARTs include 16-byte send/receive FIFOs, a
programmable baud rate generator, complete modem control capability,
and a processor interrupt system.
The W83777F/W83787F supports three optional PC-compatible printer
ports: 378b, 278h and BBCh. Additional bi-directional l/O capability
is available by hardware control or software programming. The parallel
port also supports the Enhanced Parallel Port (EPP) and Extended
Capabilities Port (ECP). The W83777F/W83787F supports two embedded
hard disk drive (AT bus) interfaces and a game port with decoded
read/write output.
The W83777F/W83787F's Extension FDD Mode and Extension 2FDD Mode allow
one or two external floppy disk drives to be connected to the computer
through the printer interface pins in notebook computer applications.
The Extension Adapter Mode of the W83777F/W83787F allows pocket
devices to be installed through the printer interface pins in notebook
computer applications according to a protocol set by Winbond, but with
upgraded performance.
The JOYSTICK mode allows a joystick to be connected to a parallel port
with a signal switching cable.
The configuration register supports address selection, mode selection,
function enable/disable, and power down function selection.
***Versions:...
***Features:...
**W83877F WINBOND I/O (Multi I/O) <96...
**W83877TF/TG/TD WINBOND I/O (Multi I/O) c97...
**W83977F/G/AF/AG WINBOND I/O (Multi I/O) c97...
**W83977TF WINBOND I/O (Multi I/O) c97...
**W83977EF WINBOND I/O (Multi I/O) <98...
**W83977ATF WINBOND I/O (Multi I/O) <98...
**
**Disk Controller:
**W83759/A/F/AF Advanced VL-IDE Disk Controller <96...
**W83769 Local Bus IDE Solution <94...
**
**UARTS:
**W86C250A UART (equivalent of INS8C250A) [no datasheet]
**W86C450/P Universal Asynchronous Receiver/Transmitter <Jul89...
**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:...
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