ZIDA TECHNOLOGIES, LTD. OPTI 3486 Processor 80386DX/80486SX/80487SX/80486DX/80486DX2 Processor Speed 20/25/33/40/50(internal)/50/66(internal)MHz Chip Set OPTI Max. Onboard DRAM 32MB SRAM Cache 64/128/256KB BIOS AMI Dimensions 220mm x 220mm I/O Options None NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location Reset switch J1 Speaker J4 Turbo LED J3 Power LED & keylock J5 Note:The Locations of connectors J1, J3, J4, and J5 are unknown. USER CONFIGURABLE SETTINGS Function Jumper Position » Factory configured - do not alter P2 Unknown DRAM CONFIGURATION Size Bank 0 Bank 1 1MB (4) 256K x 9 NONE 2MB (4) 256K x 9 (4) 256K x 9 4MB (4) 1M x 9 NONE 8MB (4) 1M x 9 (4) 1M x 9 16MB (4) 4M x 9 NONE 20MB (4) 4M x 9 (4) 1M x 9 32MB (4) 4M x 9 (4) 4M x 9 SRAM CONFIGURATION Size Cache Location TAG 64KB (8) 8K x 8 Banks 0 & 1 (1) 8K x 8 128KB (4) 32K x 8 Bank 0 (1) 8K x 8 256KB (8) 32K x 8 Banks 0 & 1 (1) 32K x 8 SRAM JUMPER CONFIGURATION Size P3 P5 P6 P7 P8 P9 64KB pins 2 & Open Open Open Open Open 3 closed 128KB pins 1 & Open Open Closed Closed Closed 2 closed 256KB pins 2 & Closed Closed Closed Closed Closed 3 closed CONFIGURATION FOR 80386DX CPU Jumper 33MHz 40MHz P4 pins 1 & 2 closed pins 1 & 2 closed P12 N/A N/A P13 N/A N/A P14 N/A N/A P25 pins 2 & 3 closed pins 2 & 3 closed P28 Open Open P30 Closed Open P31 Closed Open P32 Open Closed P33 Open Open P39 Closed Open P97 Closed Closed P100 pins 1 & 2 closed pins 1 & 2 closed CONFIGURATION FOR 80486SX, 80486DX & 80486DX2 CPU Jumper 20MHz 25MHz 33MHz 50iMHz 50MHz 66iMHz P4 pins 2 & pins 2 & pins 2 & pins 2 & pins 2 & pins 2 & 3 3 3 3 3 3 P12 pins 2 & pins 2 & pins 1 & pins 1 & pins 1 & pins 1 & 3 3 2 2 2 2 P13 Open Open pins 1 & pins 1 & pins 1 & pins 1 & 2 2 2 2 P14 Open Open Closed Closed Closed Closed P25 pins 1 & pins 1 & pins 1 & pins 1 & pins 1 & pins 1 & 2 2 2 2 2 2 P28 Closed Closed Closed Closed Closed CLosed P30 Open Closed Closed Closed Closed Closed P31 Closed Open Closed Open Open Closed P32 Closed Closed Open Closed Closed Open P33 Closed Closed Closed Closed Closed Closed P39 N/A N/A N/A N/A N/A N/A P97 Open Open Open Open Closed Open P100 pins 2 & pins 2 & pins 2 & pina 2 & pins 2 & pins 2 & 3 3 3 3 3 3 Note:Pins designated should be in the closed position. Location of jumpers P30, P31, P32 and P97 are unknown.