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**82495XP/490XP Cache Controller / Cache RAM (for i860) 06/05/91
***Notes:...
***Info:...
***Features:...
**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...
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**82C391/392 386WB PC/AT Chipset (386DX) <Dec90
***Info:...
***Configurations:...
***Features:...
**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] ?...
**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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*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
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**WD7600A/LP/LV System Chip Set for 80286 or 80386SX <11/25/91
***Info:
****General:...
****WD76C10A/LP/LV (System Controller):
GENERAL DESCRIPTION
The WD76C10A is designed for use in a high performance desktop AT
computer, using an 80286 or 803868X processor of up to 25 MHz. The
WD76C10ALP has the features of the WD76C10A and is designed to operate
in a high performance notebook/laptop AT compatible computer using an
80286 or 803868X processor. With the exception of the 80286 modes, the
WD76C10ALV has all the capabilities of the WD76C10ALP plus the ability
to operate with a 3.3 volt power supply.
1.3.1 WD76C10A
The WD76C10A contains a high performance memory controller with
programmable modes of operation. It supports non-page, zero wait state
read and write memory control. A maximum of four banks of 64 Kbit, 256
Kbit, 1 Mbit or 4 Mbit DRAM may be controlled, allowing up to 16
Mbytes of real or 32 Mbytes EMS (Expanded Memory Specification)
memory. Any combination of DRAM sizes may be used. in addition, the
WD76C10A controls page mode DRAM or static column DRAM with page mode
operation.
The on-board memory can be allocated either to extended or EMS memory
in 128 Kbyte increments. Forty EMS registers support EMS 4.0
multitasking. An internal self-tuning delay line is used for DMA and
Bus Master memory cycles. Delay line information is also used to
adjust the strength of the output drivers. This stabilizes the output
rise and fall times, reducing ground noise and electromagnetic
interference (EMI).
EMS access to external RAM or ROM may be used to support Kanji or
other extended character sets.
The WD76C10A interfaces with either an 80286 or 803868X processor. The
processor type is automatically sensed at power up. No extra logic is
required to interface with the 803868X. The variation in processor
reset propagation delay is controlled to meet the strict reset timing
of the 803868X.
1.3.2 WD76C10ALP
In addition to supporting all the features of the WD76C10A, the
WD76C10ALP also supports portable notebook/laptop computers. To
provide this support, the WD76C10ALP makes use of Power Management
Control (PMC) for powering down peripherals or the processor,
processor stop clock, slow clock, automatic processor clock speed
switching modes and CAS before RAS slow refresh. Suspend and resume is
supported when low power DRAM is refreshed while the processor and
other power consuming devices are turned off. The power drain for the
core logic and VGA controller is less than 5 mA in this mode. Power
and clock speed may be controlled by the keyboard processor,
transparently to the 80286 or 80386SX.
The System Activity Monitor (SAM) provided by WD76C10ALP is a
transparent feature that replaces the functions previously performed
by software. It senses when the system has been idle for a previously
programmed period of time and determines a clean break point in which
to perform power down activities such as suspend.
1.3.3 WD76C10ALV
The WD76C10ALV supports all of the 803868X mode functions and features
supplied by the WD76C10ALP. In addition, the WD76C10ALV has improved
the PC notebook/laptop design by operating with a 3.3 volt +- 0.3V
power supply, which nearly doubles the battery life.
The WD76C10ALV does not support 80286 modes.
The DC operating Characteristics and AC timing specifications that
differ from the WD76C10A/LP are presented in the Appendix.
****Other Chips:...
***Configurations:...
***Features:...
**WD7700/LP System Chip Set for 80286 or 80386SX (Cache) <11/25/91...
**WD7855 System controller for 80386SX <09/25/92...
**WD7900/LP/LV System Chip Set for 80286 or 80386SX (Cache) <11/25/91...
**WD8110 System controller for 80386DX/486 <11/30/93...
**
**Support Chips:
**WD76C20x Floppy, RTC, IDE and Support Logic Device <11/25/91...
**WD76C30x Perip. Ctrl, Interrupt Multiplex, and Clock Gen <11/18/91...
**WD7615 Desktop Buffer Manager <04/15/92...
**WD7625 Desktop Buffer Manager <10/01/92...
**WD8120LV Super I/O [no datasheet] ?
**Other Chips:...
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