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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...
*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
*SIS...
*Symphony...
*TI (Texas Instruments)...
*UMC...
*Unresearched:...
*VIA...
*VLSI...
**VL82C521/522 Lynx/M ?
***Info:...
***Configurations:...
***Features:
o Support for Pentium and Pentium-class CPUs
o 64-bit wide SDRAM, EDO, and FPM DRAM controller
o Nine-deep, 64-bit fast-access smart write buffers
o Fully PCI 2.1 compliant, 33MHz, synchronous or asynchronous, high
performance (120 MB/s) PCI bus with full concurrency to support
high bandwidth multi-media
o Flexible L2 write-back cache controller supporting 3-1-1-1-1-1-1-1
burst cycles
o Highly integrated chipset in low-profile BGA packages
o Active thermal feedback (ATF) for closed-loop thermal control of
the CPU
o PCI bridge support for high-performance primary PCI hot docking
o Common Architecture Serial Bus minimizes docking connector pin
count
o SMB/I2C system management bus improves battery monitoring
o Singular ROM for keyboard, System and graphics BIOS
o Full 2 channel Bus Mastering IDE controller
o Integrated '077 FDC
o Two 16550 UARTs
o 8052 keyboard controller with built-in scan for matrix keyboards and
boot controller functionality
o system clocks from power-managed PLLs with on-board buffering for
distribution
o Two PWMs to provide LCD backlight and contrast control
o Parallel port with PS2, EPP and ECP extensions
o Built-in IrDA 1.1 Fast Infrared communications port
o Multiple VCC rails and on-board level shifters to provide inder-
pendent power-down and true 5.0 Vdc peripheral support
o Support for three PS2 ports
o Real-Time Clock with CMOS
o 25 GPIO pins with expansion
o Built-in Sub-ISA bus for 16-bit DMA ISA Master audio device
o Supports 3.3V and 0V suspend with multiple resume events, I/O
trapping, and audio 0V suspend/resume
o Bus Keeper I/Os to reduce battery drain in suspend mode
o Supports shut-down option for CPU core power during powered
suspend to maximize battery life
o Supports CPU clock division emulation to effectively reduce CPU
clock frequency
o Plug-N-Play support
o Compliant with Microsoft recommendations for Win '95
**VL82C530 Eagle Ð c95...
**VL82C541/543 Lynx c95...
**VL82C591/593 SuperCore 590 c94...
**VL82C594/596/597 Wildcat c95...
**I/O Chips:
**VL82C106 Combination I/O chip ?...
**VL82C107 SCAMP Combination I/O chip ?...
**VL82C108 TOPCAT Combination I/O chip ?...
**VL82C110 Combination I/O chip ?...
**VL82C113 SCAMP Combination I/O chip ?...
**VL82C114 Combination I/O chip ?...
**Video: ...
**Disk:...
**Modems:...
**Other:...
**Not sure if they actually exist...
*Western Digital...
*Winbond...
*ZyMOS...
*General Sources:...
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