Retro Web VL-ISA-PB486GRN PC Main Board User Manual
- June 15, 2024
- Retro Web
Table of Contents
Retro Web VL-ISA-PB486GRN PC Main Board
VL/ISA-PB486GRN
PC Main Board
Disclaimer
The information in this manual has been carefully checked and is believed to be accurate. We assume no responsibility for any inaccuracies that may still be contained in this manual. We reserve the right to make changes to this material at any time without notice.
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Contents
Introduction
This manual has two purposes. First, help users get familiar with the system board. Second, serve as a guide of procedures and specifications for future system upgrade.
OPTi 895 GREEN PC MB provides a highly integrated solution for fully compatible, high performance PC/AT platforms. It supports Intel’s 80486DX4/DX2/DX/SX/SL Enhanced CPU, AMD486 and Cyrix microprocessor.
Features
- CPU: Intel 80486SX/DX/DX2/SL-Series, Intel P24C (DX4), AMD Am486DX/DX2, Cyrix Cx486DX/DX2(M7)
- System Clock: Use system clock/chip generator IMI468, CPU operating frequency 8-100MHz
- DRAM Memory: Support 4 banks of 72pin SIMM module, Support 1MB to 64MB DRAM memory on board
- Cache Memory: Support 128KB, 256KB or 512KB Secondary Cache memory on board, Support 486 Burst mode on Secondary Cache memory
- Shadow RAM: Main BIOS Shadow function programmable, Video BIOS Shadow function programmable, Adapter BIOS Shadow function programmable, Shadow RAM Cacheable function programmable
- Green Function: System Timeout Timer from 15 seconds to 4 hours, Auto-Mode is used to accommodate non SL-Series CPU, system clock slow down to 8 MHz, SMI-Mode is used to accommodate SL-Series CPU, system clock slow down to 0 MHz, Support individual Monitor Standby Mode (Monitor off) control, Support IDE Hard Disk Drive Power Down Mode control, Support External Power Control Port for monitor power on/off, Wake up system by all IRQs, DRQs, and HDD/FDD I/O Ports
Specifications
| Feature | Specification |
|---|---|
| CPU Support | Intel 80486SX/DX/DX2/SL-Series, Intel P24C (DX4), AMD |
Am486DX/DX2, Cyrix Cx486DX/DX2(M7)
System Clock| IMI468, 8-100MHz
DRAM Memory| 4 banks, 72pin SIMM, 1MB to 64MB support
Cache Memory| 128KB, 256KB, 512KB options, 486 Burst mode support
Shadow RAM| Programmable for Main, Video, and Adapter BIOS
Green Function| Timer, Auto-Mode, SMI-Mode, Power control for Monitor and HDD
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FAQ
What CPUs are supported by the VL/ISA-PB486GRN?
It supports Intel 80486SX/DX/DX2/SL-Series, Intel P24C (DX4), AMD Am486DX/DX2, and Cyrix Cx486DX/DX2(M7).
How many memory banks does the motherboard support?
It supports 4 banks of 72pin SIMM modules.
Can the system accommodate power management functions?
Yes, it includes a System Timeout Timer, Auto-Mode for non SL-Series CPUs, and SMI-Mode for SL-Series CPUs among other power management features.
Is the BIOS programmable for different functions?
Yes, the BIOS is programmable for Main, Video, and Adapter BIOS Shadow functions
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