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**82496/491 Cache Controller / Cache RAM (for P5 Pentium) 03/22/93
***Notes:...
***Info:
The 82496 Cache Controller and multiple 82491 Cache SRAMs combine with
the Pentium processor to form a CPU Cache chip set designed for high
performance servers and function-rich desktops. The high speed
interconnect between the CPU and cache components has been optimized
to provide zero-wait state operation. This CPU Cache chip set is
fully compatible with existing software, and has new data integrity
features for mission critical applications.
The 82496 cache controller implements the MESI write-back protocol for
full multiprocessing support. Dual ported buffers and registers allow
the 82496 to concurrently handle CPU bus, memory bus, and internal
cache operation for maximum performance.
The 82491. is a customized high-performance SRAM that supports 32, 64,
and 128-bit wide memory bus widths, 16, 32, and 64 byte line sizes,
and optional sectoring. The data path between the CPU bus and memory
bus is separated by the 82491, allowing the CPU bus to handshake
synchronously, asynchronously, or with a strobed protocol, and
allowing concurrent CPU bus and memory bus operations.
***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...
**800 series...
*Headland/G2...
*HMC (Hulon Microelectronics)...
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*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
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*Unresearched:...
*VIA...
*VLSI...
**VL82C311 SCAMP-DT ?
***Info:...
***Configurations:...
***Features:
o Fully compatible with 286- or 386SX-based PC/AT compatible systems
(VL82C311L is 286 compatible only)
o Up to 25 MHz system clock in a 386SX-based system and up to 20 MHz
in a 286-based system
o Replaces the following peripheral logic on the motherboard:
- Two 82C37A DMA controllers
- 74LS612 memory mapper
- Two 82C59A interrupt controllers
- 82C54 timer
- 82284 clock generator and ready interface
- 82288 bus controller
o Includes:
- Memory/refresh controller
- Port B, and NMI logic
- Bus steering logic
- Parity generation logic
- Parity checking logic
- Turbo control logic
- Staggered refresh to minimize power supply load variations
- Three-state control pin for board level testing
o Memory controller features include:
- Programmable option for page mode or non-page mode operation
- Two-way block interleaving
- Programmable option for zero and one wait state operation
- Capability to drive up to four banks directly
o VL82C310 power saving features include:
- Sleep Mode
- Slow DRAM refresh
- Low power page interleave memory mode
o Supports:
- Up to 16 MB system memory
- LIM EMS 4.0 over entire system memory
- JEIDA IC Memory Card (VL92C310 only)
- VL82C325 (SX) Cache controller
- Four 16-bit wide banks of 256K, 1M, or 4M DRAM or SRAM
- Shadow RAM in 640K to 1M range
- 287 and 387SX numeric coprocessors
- 8- and 16-bit wide BIOS ROMs
- Asynchronous slot bus operation
- Systems with up to 16 MHz backplane operation
- Relocation of video and slot ROMs
o Other advanced features:
- Programmable I/O decode for 10- pr 16-bit addresses
- Hardware configurable setup to minimize custom BIOS requirements
- Programmable drive current to reduce ringing on DRAM and slot
bus interface signals
- Programmable, extendable peripheral cycle
- Capability to disable software coprocessor reset
- Automatic bus speed-up on video access
o 1.0-micron CMOS technology
o 160-lead metric quad flat pack (MQFP)
**VL82C311L SCAMP-DT 286 ?...
**VL82C312 SCAMP Power Management Unit (PMU) ?...
**VL82C315A SCAMP II, Low-Power Notebook Chipset ?...
**VL82C322A SCAMP II, Power Management Unit (PMU) ?...
**VL82C316 SCAMP II, PC/AT-Compatible System Controller ?...
**VL82C323 SCAMP II, 5 Volt Power Management Unit (PMU) ?...
**VL82C380 Single chip 386DX PC/AT Controller +on-chip cache ?...
**VL82C325 VL82C386SX System Cache controller ?...
**VL82C335 VL82C386DX System Cache ctrl. [no d.sheet] ?...
**VL82C315A/322A/3216 Kodiak 32-Bit Low-Voltage Chip Set ?...
**VL82C420/144/146 SCAMP IV [no datasheet, some info] c93...
**VL82C480 System/Cache/ISA bus Controller ?...
**VL82C481 System/Cache/ISA bus Controller c92...
**VL82C486 Single-Chip 486, SC486, Controller ?...
**VL82C425 486 Cache controller ?...
**???????? Cheetah 486, PCI [no datasheet] ?...
**VL82C3216 Bus Expanding Controller Cache with write buffer ?...
**VL82C521/522 Lynx/M ?...
**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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