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**82495XP/490XP Cache Controller / Cache RAM (for i860) 06/05/91
***Notes:...
***Info:...
***Features:
o Two-Way, Set Associative, Secondary Cache for i860 XP
Microprocessor
o 50 MHz "No Glue" Interface with CPU
o Configurable
- Cache Size 256 or 512 Kbytes
- Line Width 32, 64 or 128 Bytes
- Memory Bus Width 64 or 128 Bits
o Dual-Ported Structure Permits Simultaneous Operations on CPU and
Memory Buses
o Efficient MRU Way Prediction
- Zero Wait States on MRU Hit
- One Walt State on MRU Miss
o Dynamically Selectable Update Policies
- Write-Through
- Write-Once
- Write-Back
o MESI Cache Consistency Protocol
o Hardware Cache Snooping
o Maintains Consistency with Primary Cache via Inclusion Principle
o Flexible User-Implemented Memory Interface Enables Wide Range of
Product Differentiation
- Clocked or Strobed
- Synchronous or Asynchronous
- Plpelining
- Memory Bus Protocol
o 82495XP Cache Controller Available in 208-Lead Ceramic Pin Grid
Array Package
o 82490XP Cache RAM Available in 84-Lead Plastic Quad Flatpack
Package
**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...
**82C481?/482? HiP/486 & HiB/486 [no datasheet] Oct89
***Notes:...
**82C491/392 486WB PC/AT Chipset <04/21/91...
**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...
*Western Digital...
*Winbond...
**W83757 SUPER I/O CHIP <92
***Info:
GENERAL DESCRIPTION
The W83757 is a super multi I/O chip that combines the functions of a
Floppy Disk Drive adapter, serial (UART)/parallel adapter, IDE bus and
game port. The W83757's disk drive adapter functions include a
standard Floppy Disk Drive controller, data separator, write
precompensation circuit, decode logic, data rate selection, clock
generator, drive interface control logic, interrupt and DMA logic,
thus greatly reducing the number of components required to interface
floppy disk drives. As a UART, the chip supports 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 operation. The UART includes a programmable baud rate
generator, complete MODEM control capability and a processor-interrupt
system. As a parallel port, the W83757 provides the user with a fully
bidirectional parallel centronics-type printer interface. Besides the
above functions, this chip also supports two Embedded Hard Disk Drives
(AT bus interface) and a game port decoder.
***Versions:...
***Features:...
**W83767F ?? Multi I/O [no datasheet]
**W83777F/87F Power I/O (Multi I/O) <95...
**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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