Pentium
TM
OverDrive Ready System Board
The 486-OCV Plus uses 256Kx36, 512Kx36, 1Mx36,
2Mx36, 4Mx36 and 8Mx36 HSIM modules with speeds
of at least 80ns. The memory can be configured to
twenty-one different sizes from 1MB to 64MB. The
system is equipped with two 32-bit VESA VL-Bus and
eight 16-bit ISA expansion slots.
Features and Specifications
• Intel 80486DX running at 33/40/50MHz,
80486DX2 running at 50/66MHz, 80486
OverDrive
TM
Processor, Pentium
TM
OverDrive
Processor running at 50/66MHz, or 80486SX
running at 25/33MHz
Cyrix or AMD 486DX running at 40MHz
• Uses AMI BIOS: 27512-20 (1)
• Uses OPTi 82C499 chip set
• Cache organization: direct map, write back and bank
interleave
• Supports 64K, 128K and 256K cache sizes
• Memory configurable from 1MB to 64MB
• Uses 256Kx36, 1Mx36 and 4Mx36 HSIMM
Uses 512Kx36, 2Mx36 and 8Mx36 (for Banks 0 and
2 only)
• Supports memory with parity check
• 8MHz bus clock
• Software programmable cache and DRAM wait states
• Supports system BIOS and Video BIOS Shadow
RAM function
• Supports sixteen edge triggered interrupts
• Hidden refresh or slow refresh supported
• Optional Flash memory BIOS supported
• Supports Pentium
TM
OverDrive Processor Zero
Insertion Force socket
• Supports one PS/2 mouse port
• An optional diagnostic LCD port
1-2
u
Introduction
