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**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...
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**82C263 SCNB Single Chip Notebook c:92
***Notes:...
***Info:...
***Configurations:...
***Features:...
**82C281/282 Cache Sx/AT (386SX) <08/22/91...
**82C283 386SX System Controller c:91...
**82C291 SXWB PC/AT Chipset (386SX) c:91...
**82C295 SLCWB PC/AT Chipset (386SX) ?...
**82C381/382 HiD/386 (386DX) c:89...
**82C391/392 386WB PC/AT Chipset (386DX) <Dec90...
**82C461/462 Notebook PC/AT chipset [no datasheet] ?...
**82c463 SCNB Single Ship Notebook c:92...
**82c465MV/A/B Single-Chip Mixed Voltage Notebook Solution <Oct97...
**82C481?/482? HiP/486 & HiB/486 [no datasheet] Oct89...
**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] ?
***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...
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*Unresearched:...
*VIA...
*VLSI...
*Western Digital...
*Winbond...
**W83759/A/F/AF Advanced VL-IDE Disk Controller <96
***Notes:...
***Info:
GENERAL DESCRIPTION
The W83759A is an advanced version of Winbond's popular VL-IDE
interface chip, the W83759. The W83759A retains all of the features
and compatibility of the W83759 (the chip meets the ANSI ATA 4.0
specification for IDE hard disk operation and the VESA VL-Bus 2.0
specification for PC local bus devices) while incorporating new
features to meet Enhanced IDE, SFF-8011, ATA-2, and Fast-ATA
specifications.
Supports Disk Capacity of Greater than 528 MB
The W83759A's driver can handle remapping from BIOS CHS mode to HDD
LBA mode. This scheme enables users to break the 528 MB per drive
barrier, allowing full use of BIOS INT13 CHS information in drives
with a capacity of up to 8.4 GB.
High Speed Host Transfer Rate
The W83759A supports Enhanced IDE PIO mode 3 and Fast ATA PIO mode 3
and 4 timing; jumper settings or driver programming can be used to
select the PIO mode and a 33 or 50 MHz VL-Bus clock. Different
programming timing can be selected for different drives in the same
system. The burst transfer rate is shown in the following table.
ATA PIO IDE COMMAND CYCLE BURST TRANSFER RATE IORDY THROTTLE
MODE TIME (nS) (MB/sec) CONTROL
0 600 3.33 Option
1 383 5.22 Option
2 240 8.33 Option
3 180 11.1 Required
4 120 16.6 Required
Dual IDE Channels
Like the W83759, the W83759A supports a secondary IDE address
(170h-177h/376h) and IRQ15 for applications with four hard disk
drives. Additionally, the primary and secondary channels can be
independently enabled or disabled by jumper settings or software
programming.
Non-disk IDE Peripherals
Because the command cycle can be programmed individually for each
drive and dual IDE channels are supported, non-disk IDE peripherals
(such as an ATAPI CD-ROM or tape drive) can be attached to the
secondary IDE without affecting the transfer rate of the ATA disk
drive. Sales of ATAPI IDE CD-ROMs are expected to grow rapidly as
these devices become a standard part of many users' desktop PC setup.
The W83759A provides all of the next-generation ATA-IDE requirements,
including support for high capacity disk drives, high speed host
transfers, multiple IDE peripherals, and non-disk IDE peripherals. It
makes high-performance, low-cost, easy-to-use IDE machines possible.
The W83759A is pin-to-pin backward compatible with the W83759. In
addition to the advanced features described above, the W83759A
supports automatic power-down, standby, and suspend APM power
management states for green PC applications. This new chip is packaged
in a 100-pin QFP.
The table below compares the W83759 and W83759A:
W83759 W83759A
Dual Channel IDE Yes Yes
8.4 G Max. Cap. Software Driving Software Driving
PIO Mode 3, 4 Control No Yes*
DMA Mode Control No Yes*
IOCHRDY Control No Yes*
IDE Timing Control Jumper Jumper or Driver*
Prefetch Control No Yes*
Power Saving Control No Yes*
ATAPI Protocol Software Driving Software Driving
>* All control is drive-by-drive (per drive selectability)
***Versions:...
***Features:...
**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...
**
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