UNIDENTIFIED 486SI4 (M-81) Processor 80486SX/80487SX/80486DX/80486DX2 Processor Speed 20/25/33/50(internal)/50/66(internal)MHz Chip Set C & T Max. Onboard DRAM 32MB SRAM Cache 128/256KB BIOS AMI Dimensions 254mm x 218mm I/O Options 32-bit local bus card slot NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location Turbo LED J3 Reset switch J6 Turbo switch J4 Power LED & keylock J7 Speaker J5 32-bit local bus card S1 USER CONFIGURABLE SETTINGS Function Jumper Position » Local bus data size select J8 pins 1 & 2 32-bits closed Local bus data size select J8 pins 2 & 3 16-bits closed » Factory configured - do not alter JP1 open » Monitor type select color JP2 closed Monitor type select monochrome JP2 open » Factory configured - do not alter JP3 pins 2 & 3 closed » Factory configured - do not alter JP4 pins 2 & 3 closed » Factory configured - do not alter JP5 closed CPU JUMPER CONFIGURATION CPU JP6 JP7 JP8 80486DX closed pins 1 & 2 pins 1 & 2 closed closed 80487SX closed pins 2 & 3 pins 1 & 2 closed closed 80486SX open open pins 2 & 3 closed 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 JUMPER CONFIGURATION Jumper 128KB 256KB SR1 pins 2 & 3 closed pins 2 & 3 closed SR2 pins 2 & 3 closed pins 2 & 3 closed SR3 pins 2 & 3 closed pins 2 & 3 closed SR4 pins 1 & 2 closed pins 2 & 3 closed SR5 pins 1 & 2 closed pins 2 & 3 closed SR6 pins 2 & 3 closed pins 2 & 3 closed SR7 pins 2 & 3 closed pins 2 & 3 closed SR8 pins 1 & 2 closed pins 2 & 3 closed SR9 pins 1 & 2 closed pins 2 & 3 closed SRAM CONFIGURATION Size Cache SRAM Location TAG 128KB (4) 32K x 8 Bank 0 (1) 8K x 8 256KB (8) 32K x 8 Banks 0 & 1 (1) 8K x 8