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**82485 Turbo Cache (and 485Turbocache) c90
***Notes:...
***Info:...
***Versions:...
***Features:...
**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...
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*SIS...
**85C496/497 486-VIP 486 Green PC VESA/ISA/PCI Chipset <95
***Info:
The SiS 486-VIP (VESA/ISA/PCI) chips are two-chip solution ideally for
Intel's 80486, SL Enhanced 486, P24D/P24T/DX4 CPU, AMD's 486, Enhanced
Am486 and Cyrix's Cx486 (M7)/Cx 5x86 CPU based on green AT system. By
supporting the most popular industrial standard system interfaces, it
provides flexible configurations for system design and applications.
The SiS85C496 PCI & CPU Memory Controller (PCM) integrates the Host
Bridge (Host Interface), the cache and main memory DRAM Controller,
the PCI Bridge, the built-in IDE Controller, and the FS-Link Bus (Fast
Slow Link Bus). It provides the address paths and bus control for
transfers among the Host (CPU/L1 cache), main memory (L2 cache and
DRAM), the Peripheral Component Interconnect (PCI) Bus, and the
FS-Link Bus. The L2 cache controller supports both write-through and
write-back cache policies and cache sizes up to 1 MBytes. The cache
memory can be built using standard asynchronous SRAMs. The main
memory DRAM controller interfaces DRAM to the Host Bus, PCI Bus, and
FS-Link Bus. Up to eight single sided SIMMs or four double sided SIMMs
provide a maximum of 255 MBytes of main memory. The installation of
DRAM SIMMs is "Table-Free", which allows the SIMMs be installed into
any slot location and any combinations. The built-in IDE hard disk
controller allows CPU accessing hard disk and also provides higher
system integration with lower system cost. The 85C496 is intended to
be used with the SiS85C497 which is a AT Bus Controller with built-in
206 controller.
The SiS85C497 AT Bus Controller and Megacells (ATM) provides the
interface between PCI/CPU/Memory Bus (fast machine) and the ISA Bus
(slow machine). It also integrates many of the common I/O functions
in today's ISA based PC systems. The 85C497 comprises the FS-Link
interface (Fast-Slow Link interface), ISA bus controller , DMA
controller and data buffers to isolate the FS-Link Bus from the ISA
Bus and to enhance performance. It also integrates a 14 channel
edge/level interrupt controller, refresh controller, a 8-bit BIOS
timer, three programmable timer/counters, non-maskable-interrupt (NMI)
control logic, Power Management Unit, and RTC. Figure 1 .1 [see
datasheet] shows the system block diagram.
***Configurations:...
***Features:
o Host Bus
- Supports Intel 486, P24D, P24T, DX4, SL
- Enhanced 486, AMD 486, Enhanced Am486, and Cyrix M7/Cx 5x86
in 25/33/40/50 Mhz, 5V CPU.
o VESA Bus Slave
- Supports VESA Bus Specification Rev. 2.0p with Local Device
Target only.
o PCI Local Bus
- Supports PCI Bus Specification Rev. 2.0 with up to 4 PCI Masters
- Implements 3 Level Post Write Buffer for CPU write PCI Target
Memory Cycle.
- Supports Back to Back Single Memory Write to PCI Burst Write.
- Supports PCI Interrupt Steering with Four PIRQ Inputs.
- Supports PCI Master Burst Accesses On-Board Memory Up to 64
Double Word Long.
- Supports Concurrency PCI Bus.
- Snoop Filter and Advanced Snooping for Reducing CPU Snoops
During Sequential PCI Master Accesses On-Board Memory Cycles.
- Supports PCI Bus PCI to PCI Bridge.
o Supports L1 Cache Write Back CPU (P24T/P24D/M7/Enhanced Am486)
systems
o Supports Cx 5x86 Linear Burst Order Mode.
o L2 Cache Controller
- Write-Back or Write-Through Schemes
- Bank Interleave/Non-Interleave Cache Access
- Cache Size: 64K/128K/256K/512K/1MB
- 8 bit or 7 bit Tag (Combined Tag and Dirty SRAM) with
Direct-Mapped cache organization.
- Optional Separate Dirty SRAM.
o DRAM Controller
- Supports 8 Banks Non-Interleaved Access for Single and Double
Sided SIMMs up to 255 MBytes.
- Supports DRAM CAS Before RAS Refresh.
- Supports "Table-Free" DRAM configuration.
- Programmable driving current for the DRAM signals.
- Supports Symmetrical and Asymmetrical DRAMs.
- Supports 256K/512K/1M/2M/4M/8M/16M/32M xN Fast Page Mode and
EDO DRAM.
o Built-In Local Bus IDE Interface
- Supports Data Conversion for the Double Word Accessing
- Supports Symmetry Configuration for Channel 1 and Channel
0, PIO Mode IDE Hard Disks.
- Supports Mode 3 and above Timing.
- Supports Individual Drive Timing Setting for Optimal Performance
- Supports Posted Write Buffers and Pre-fetch Buffer.
- Supports Primary IDE or Secondary IDE Addressing (1Fx/17x)
o Fast-Slow Link Interface
- Linkage to ISA Bridge by FS-Link Interface.
- Fast Access to BIOS, ISA Memory Holes, and Interrupt Acknowledge
Cycle by FS-Link.
- Two Programmable Non-Cacheable Regions
- Two Programmable PCI Memory Holes and One Programmable ISA
Memory Holes.
o 208-Pin PQFP
o 0.6um Low Power CMOS Technology
**85C501/502/503 Pentium/P54C PCI/ISA Chipset <01/09/95...
**5101/5102/5103 Pentium/P54C PCI/ISA Chipset <04/02/95...
**5120 Pentium PCI/ISA Chipset (Mobile) <01/28/97...
**5501/5502/5503 Pentium/P54C PCI/ISA Chipset <04/02/95...
**5511/5512/5513 Pentium PCI/ISA <06/14/95...
**5571 (Trinity) Pentium PCI/ISA Chipset (75MHz) <12/09/96...
**5581/5582 (Jessie) Pentium PCI/ISA Chipset (75MHz) <04/15/97...
**5591/5592/5595 (David) Pentium PCI A.G.P. Chipset <01/09/98...
**5596/5513 (Genesis) Pentium PCI Chipset <03/26/96...
**5597/5598 (Jedi) Pentium PCI/ISA Chipset <04/15/97...
**530/5595 (Sinbad) Host, PCI, 3D Graphics & Mem. Ctrl.<11/10/98...
**540 (Spartan) Super7 2D/3D Ultra-AGP Single C.S.<11/30/99...
**55x SoC (System-on-chip) <03/14/02...
**
**Support chips:
**85C206 Integrated Peripheral Controller [no datasheet] ?...
**5595 Pentium PCI System I/O <12/24/97...
**950 LPC I/O <07/16/99...
**Other:...
**PII/III/Pro...
**Athlon etc...
*Symphony...
*TI (Texas Instruments)...
*UMC...
*Unresearched:...
*VIA...
*VLSI...
*Western Digital...
*Winbond...
*ZyMOS...
*General Sources:...
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