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**82495XP/490XP Cache Controller / Cache RAM (for i860) 06/05/91
***Notes:...
***Info:...
***Features:...
**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...
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*HMC (Hulon Microelectronics)...
*Logicstar...
*Motorola...
*OPTi...
**82C802G/GP System/Power Management Controller (cached) c:93
***Notes:...
***Info:
The 82C802G/GP provides a highly integrated solution for fully
compatible, high performance PC/AT platforms. This chipset will
support 486SX/DX/DX2/DX4 and P24T microprocessors in the most cost
effective and power efficient designs available today. For power
users this chipset offers optimum performance for systems running up
to 50MHz.
Based fundamentally on OPTi’s proven 82C801 and 82C802 design
architectures, the 82C802G/GP adds additional memory configurations
and extensive power management control for the processor and other
motherboard components.
The 82C802G/GP supports the latest in write-back processor designs
from Intel, AMD, and Cyrix, as well as supporting the AT bus and VESA
local bus for compatibility and performance. It also includes an
82C206 Integrated Peripherals Controller (IPC), all in a single
208-pin PQFP (Plastic Quad Plat Pack) package for low cost.
Power Management Block
Figure 2-1 [see datasheet] exemplifies the flexibility of the
82C802G/GP/82C602 GREEN strategy. System designs can easily
accommodate both SLe and non-SLe CPUs. If an Intel non-SLe CPU is
used. SMI#, SMIACT#, and FLUSH# are no connects. One design can easily
accommodate both types of processors with minimal changes for
upgrades.
***Configurations:...
***Features:...
**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...
**VT82C496G Pluto, Green PC 80486 PCI/VL/ISA System <05/30/94
***Info:...
***Configurations:...
***Features
1. Fully IBM PC/AT Compatible
2. Flexible CPU and Local Bus Interface
- Supports 80486SX/DX/DX2/DX4 and compatible CPUs
- CPU speed up to 100 Mhz including 80486DX-50, 80486DX2-66 and
80486DX4-100
- Supports CPUs with write-back internal cache, e.g. P24D, P24T
and Cx486DX/DX2
- Snoop filtering for write-back CPUs
- Supports SMI protocols of Intel, AMD, TI and Cyrix CPUs
- CPU clock stretching and throttling
- Zero frequency and zero voltage CPU suspend
- Soft and hard CPU reset
- Direct VESA and other local bus interface with DMA/master access
- Built-in arbitration for two local bus masters
3. Advanced Cache Controller
- Write back/write through scheme
- Direct map scheme
- Flexible cache size: 0K/32K/64K/128K/256K/512K/1MB
- One bank or two banks of data independent of cache size
- Integrated 8-bit tag comparator
- Interleaved SRAM access to achieve 2-1-1-1 burst fill
- Supports burst read and burst write transfers
- System and video BIOS cacheable and write-protect
- Programmable cache timing
- Programmable non-cacheable region
- Optional combined tag and alter bit SRAM for the write-back
scheme
- Eight bit tag under the combined tag-alter scheme without
sacrifice of cacheable space
4. Fast Page Mode DRAM Controller
- Mixed 256K/512K/1M/2M/4M/8M/16MxN DRAMs
- 8 banks up to 128MB
- Flexible column and row addresses
- 30 pin (x9) and single/double density 72 pin (x36) SIMM
module support
- Programmable DRAM timing
- BIOS shadow at 16KB increment
- 256/384K memory relocation
- System management memory remapping
- Decoupled DRAM refresh with staggered RAS timing
- CAS-before-RAS and slow refresh
5. Synchronous ISA Bus Controller
- Synchronous ISA bus clock
- Programmable wait state, command delay and IO recovery time
- Bus conversion and data alignment
- Hardware and software de-turbo control
- Fast reset and Gate A20 operation
- Integrated 82C206 peripheral controller
- Edge trigger or level sensitive interrupt controller
- Flash EPROM and combined BIOS support
6. Integrated Power Management Unit
- Normal, conserve, doze, sleep and suspend modes
- System event monitoring with two event classes and two idle
timers
- Primary and secondary interrupt differentiation for individual
channels
- One extended peripheral timer and one general purpose timer
- Automatic conserve mode operation for short and frequent system
idleness
- Modular clock and modular power
- CPU clock stretching, throttling or stop without affecting the
ISA bus clock
- Zero frequency operation with automatic resume
- Zero volt operation with leakage control
- Four general purpose IO or power control ports
- APM 1.1 compliant
7. Integrated Local Bus IDE Controller
- 32-bit host data transfer
- Mode-3 transfer capabilities (>10MB/s)
- Programmable read/write, master/slave and active/recovery timing
in units of CPU clock
- Prefetch and write buffers
- Support either primary (1F0-1F7h) or secondary (170-177h)
channel with two devices
- No external logic required
8. High Integration and Complete Functionality
- Glueless interface with the VT82C406MV IXP (Integrated X-bus
Peripheral Controller, 100PQFP) to eliminate the multi-clock
generator, the keyboard controller with PS2 mouse, the DS-1285
style real time clock with extended CMOS RAM and the address
buffers.
- 9 TTLs for a complete main board implementation
- Optional VT82C505 (160 PQFP) to bridge a VL/ISA system to the
PCI bus
9. 0.8um high speed and low power CMOS process
10. 208-pin PQFP package
**VT82C530MV 3.3V Pentium chipset [no datasheet, some info]<05/30/94...
**VT82C570M Apollo Master, Green Pentium/P54C <06/22/95...
**VT82C580VP Apollo VP, Pentium/M1/K5 PCI/ISA System <02/15/96...
**VT82C580VPX Apollo VPX, VPX/97, Pentium with 66/75MHz Bus <01/09/97...
**VT82C590 Apollo VP2, VP2/97, Single-Chip Pentium 66MHz <01/10/97...
**VT82C597/AT Apollo VP3, Single-Chip for Pentium with AGP <10/03/97...
**VT82C598MVP Apollo MVP3,Single-Chip 66/75/83/100MHz & AGP <09/22/97...
**VT8501 Apollo MVP4,Single-Chip 66-100MHz & AGP <11/04/98...
**VT82C680 Apollo P6, Pentium-Pro Chip Set <08/30/96...
**Support chips:
**VT82C505 Pentium/486 VL to PCI Bridge <05/30/94...
**VT82C586/A/B PCI Integrated Peripheral Controller <10/13/96...
**VT82C596/A Mobile PCI Integrated Peripheral Controller <11/05/97...
**VT82C686A/B PCI Super-I/O Integrated Peripheral Ctrl. <02/10/98...
**Later P-Pro/II/III/Celeron...
**Later AMD...
**Other...
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