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**82495DX/490DX DX CPU-Cache Chip Set <Sep91
***Notes:...
***Info:...
***Configurations:...
***Features:...
**82495XP/490XP Cache Controller / Cache RAM (for i860) 06/05/91...
**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...
**HT25 3-volt Core Logic for 386SX c:Dec92
***Info:
The HT25 is the industry’s first 3-Volt single chip core logic with
integrated power management for 386SX based 3-Volt systems. Pro-
grammable power management features give system manufacturers the
flexibility of offering customized system solutions.
GENERAL DESCRIPTION
The HT25 is a PC/AT1M compatible single-chip solution with integrated
power management designed to operate in a 3-Volt system environment.
This highly integrated chip facilitates the design of low power, high
performance portable systems. The HT25 supports 3-Volt 386SX CPUs at
clock speeds up to 25MHz at 2.7V to 3.6V. It supports power
management functions using the System Management Mode (SMM).
Flexible power management is the cornerstone of the HT25. This
approach provides power saving features that can be customized for
product differentiation. Power management features include system
activity monitors and general purpose I/O pins. The HT25 generates
System Management Interrupt (SMI) to process activity information or
when access to powered down peripherals is detected. Further power
savings are achieved through the HT25’s ability to control CPU and NPU
clocks and support for slow refresh and self refresh DRAMs.
The HT25 Memory Controller features BIOS Shadowing, Memory Relocation,
EMS, Page Mode Memory Access and Interleaving. The memory controller
allows memory banks to be reordered to allow more efficient memory in-
terleaving. The HT25 supports 512Kb, le, and 4Mb DRAMs.
The HT25 architecture is optimized for 3-Volt system designs, the SD
bus acknowledge input provides a flexible I/O bus architecture and the
XD bus is buffered directly from the HT25. Further, no external data
bus buffers are required for a closed 3V system.
***Configurations:...
***Features:...
**HT35 Single-Chip Peripheral Controller [partial info] ?...
**HTK320 386DX Chip Set c:Sep91...
**HTK340 "Shasta" 486 Chip Set c:Jun92...
**Support Chips:
**HT44 Secondary Cache c:Jun92...
**Other:...
*HMC (Hulon Microelectronics)...
*Logicstar...
*Motorola...
*OPTi...
**82C291 SXWB PC/AT Chipset (386SX) c:91
***Info:
The OPTi SXWB provides a highly integrated solution for fully
compatible, high-performance PC/AT platforms. Since the chipset is so
critical to the performance and cost structure of a PC, this highly
integrated approach provides the foundation for a very cost effective
platform without compromising performance. Together with OPTi’s
82C206 Integrated Peripherals Controller (IPC), this silicon will
support the Intel/AMD 386SX and Cyrix CX486SLC microprocessors in the
most cost effective and power efficient designs available today. This
chipset offers optimum next generation performance for 386SX systems
running up to 33MHz. The OPTi SXWB solution provides the performance
benefits of a 32-bit programming architecture with the cost savings
associated with 16-bit hardware systems. The OPTi SXWB chipset
provides a solution positioned to deliver value, without neglecting
quality, compatibility, or reliability.
The 82C291 integrates a write-back cache controller, a local DRAM
controller, the CPU state machine, the AT bus state machine, and data
buffers all in a single 160-pin Plastic Quad Flat Pack (PQFP). On-chip
hardware provides the hooks for local bus device support.
***Configurations:...
***Features:...
**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] ?...
**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...
*ZyMOS...
*General Sources:...
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