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**82395SX Smart Cache 12/17/90
***Notes:...
**82396SX Smart Cache 12/17/90...
**82485 Turbo Cache (and 485Turbocache) c90...
**82489DX Advanced Programmable Interrupt Controller 10/12/92...
**82495DX/490DX DX CPU-Cache Chip Set <Sep91...
**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...
**HT44 Secondary Cache c:Jun92
***Info:
The HT44 is a look-aside write-through, 80486SX, 486DX or 486DX2
secondary cache controller. It is packaged in an inexpensive 84-pin
plastic-leaded chip carrier (PLCC).
Architecture
With its look-aside architecture, the HT44 fits beside the CPU-to-
Memory bus and not in the data path. Therefore, once the HT44 has
been designed into a 486 system, it can be populated for secondary
cache systems or left vacant for non-secondary cache systems. The HT44
is direct-mapped to the available address space.
Performance
The HT44 has a number of performance enhancing features. These
include zero-waitstate burst line fills to the 486 on secondary cache
hits, and simultaneous 486 and secondary cache updates on read misses.
Memory Configurations
The HT44 supports cache sizes from 32KBytes to 1MB. Both synchronous
and asynchronous SRAMs are supported. 25ns SRAMs are sufficient for
zero-wait-state operation at 33MHz.
Chip Set Support
The HT44 can, be implemented with minimal glue logic in a 486 system
with the HTK340 (code name Shasta) chip set. The registers in the
HTK340 allow for programming of non-cacheable and write-protected
areas of memory. The HTK340 will support the HT44 with synchronous
SRAMs only. Future Headland chip sets will support both synchronous
and asynchronous SRAM designs.
The HT44 can also be used with some third-party chip sets, however,
additional glue logic may be required.
***Versions:...
***Features:...
**Other:...
*HMC (Hulon Microelectronics)...
*Logicstar...
*Motorola...
*OPTi...
**82C566/7/8 Viper-Max Chipset Scalable MultiMedia PC Solution ?
***Info:
Overview
The OPTi Viper-MAX Chipset provides a highly integrated solution for
fully compatible, high performance PC/AT platforms based on the Intel
3.3V Pentium Processor, Cyrix 6x86 Processor, and AMD K86 Proc-
essor. As the latest member of the Desktop Viper Chipset Family, it is
designed from its inception to be the highest performance Pentium
chipset ever. its feature set can be scaled to address entry level
UMA-based system to high-end non-UMA work stations and servers. The
deep buffers in the Viper-MAX minimize system level latencies and
maximize through-puts to both DRAM and PCI subsystems.
The chipset provides 64-bit core logic, with Unified Memory Archit-
ecture (UMA), and integrated PCI support, plus sophisticated power
management features. This highly integrated approach supplies the
foundation for a cost effective platform without compromising per-
formance. Its feature set furnishes an array of control and status
monitoring options that are accessed through a simple and straight-
forward interface. All major BIOS vendors provide extensive software
hooks that allow system designers to integrate their own special
features with minimal effort.
82C566 Data Buffer Controller
The 82C566 performs the task of buffering the CPU to the DRAM memory
data path.
o CPU to memory data buffer
o CPU to PCI local bus buffer
o Memory to PCI local bus buffer
o 208-pin PQFP
82C567 System Controller
The 82C567 provides the control functions for the host CPU interface,
the 64-bit Level-2 (L2) cache, the 64-bit DRAM bus, and the PCI
interface. The 82C567 controls the data flow between the CPU bus, the
DRAM bus, the local buses, and the 8/16-bit ISA bus. It interprets and
translates cycles from the CPU, PCI bus master, ISA master, and DMA to
the host memory, PCI bus slave, or ISA bus devices. The 82C567 also
serves as the UMA (Unified Memory Architecture) and USB (Universal
Serial Bus) protocol interface.
o 3.3V CPU interface
o DRAM controller
o L1/L2 cache controller
o UMA arbiter
o USB interface
o PCI interface
o Arbitration logic
o Data bus buffer control (memory data bus to and from host data
bus)
o 208-pin PQFP
82C568 Integrated Peripherals Controller
The 820568 contains the ISA bus controller and includes an 82C206, RTC
interface, DMA controller, serial interrupt controller and distributed
DMA. It also has a sophisticated system power management unit.
o ISA bus controller
o Master mode IDE
o Type F DMA support
o Integrated 82C206 IPC
o System power management functions
o PCI local bus interface
o PCI to ISA expansion bridge
o Serial interrupt controller
o Distributed DMA
o Keyboard emulation of A20M# and CPU warm reset
o Port B and Port 092h Register
o 208-pin POFP
***Configurations:...
***Features:...
**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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