NOVACOR, INC. OPTimum EISA486SD - 6A5B1 Processor 80486SX/80487SX/80486DX Processor Speed 20/25/33/40/50MHz Chip Set OPTI Max. Onboard DRAM 32MB SRAM Cache 64/128/256/512KB BIOS AMI Dimensions 330mm x 218mm I/O Options None NPU Options 4167 [Image] CONNECTIONS Purpose Location Purpose Location Speaker J4 Reset switch S9 Power LED & keylock J5 USER CONFIGURABLE SETTINGS Function Jumper Position » Monitor type select color JP4 closed Monitor type select monochrome JP4 open CPU speed select iOCS/1 JP8 pins 1 & 2 closed CPU speed select iOCS/2 JP8 pins 2 & 3 closed DRAM CONFIGURATION Size Bank 0 Bank 1 4MB (4) 1M x 9 NONE 8MB (4) 1M x 9 (4) 1M x 9 16MB (4) 4M x 9 NONE 20MB (4) 1M x 9 (4) 4M x 9 32MB (4) 4M x 9 (4) 4M x 9 CPU TYPE CONFIGURATION CPU JP7 JP9 80486DX pins 1 & 2 and 3 & 4 closed pins 2 & 3 closed 80487SX pins 1 & 2 and 3 & 4 closed pins 1 & 2 closed 80486SX pins 2 & 3 closed open CPU SPEED CONFIGURATION Speed JP1 JP2 JP3 JP6 50MHz closed closed pins 1 & 2 open closed 40MHz open closed pins 1 & 2 open closed 33MHz closed open pins 1 & 2 open closed 25MHz open open pins 1 & 2 open closed 20MHz open open pins 2 & 3 closed closed SRAM JUMPER CONFIGURATION Size JP5 JP10 JP11 JP12 JP13 JP14 JP15 64KB pins 2 open open open open open open & 3 closed 128KB pins 1 open open closed open closed open & 2 closed 256KB pins 2 open closed closed closed closed open & 3 closed 512KB pins 1 closed closed closed closed closed closed & 2 closed SRAM CONFIGURATION Size Cache Location TAG (U50) TAG (U51) Dirty bit SRAM (U64) 64KB (8) 8K x Banks 0 & 1 (1) 8K x N/A (1) 16K x 8 8 1 128KB (4) 32K Bank 0 (1) 8K x N/A (1) 16K x x 8 8 1 256KB (8) 32K Banks 0 & 1 (1) 8K x (1) 8K x (1) 16K x x 8 8 8 1 512KB (4) 128K Bank 0 (1) 32K x N/A (1) 64K x x 8 8 1 Note:Dirty bit (U64) can always accommodate (1) 64K x 1 for any of the four configurations.