CHAINTECH COMPUTER COMPANY, LTD. 416SX/420SX/425SX/433SC/450SC Processor 80486SX/80487SX/80486DX/ODP486SX/80486DX2 Processor Speed 16/20/25/33/50(internal)/50/66(internal)MHz Chip Set SIS Max. Onboard DRAM64MB Cache 32/64/128/256KB BIOS AMI Dimensions 330mm x 218mm I/O Options None NPU Options 4167 [Image] CONNECTIONS Purpose Location Purpose Location Reset switch J1 Speaker J4 Turbo switch J2 Power LED & keylock J5 Turbo LED J3 External battery J7 USER CONFIGURABLE SETTINGS Function Jumper Position » Turbo enabled J2 Closed Turbo disabled J2 Open » Monitor type select monochrome J6 Open Monitor type select color J6 Closed » Factory configured - do not JP7 Open alter » CMOS memory normal operation JP17 pins 1 & 2 closed CMOS memory clear JP17 pins 2 & 3 closed » Factory configured - do not JP18 Open alter DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 1MB (4) 256K x 9 NONE NONE NONE 1MB (1) 256K x NONE NONE NONE 36 2MB (4) 256K x 9 (4) 256K x 9 NONE NONE 2MB (1) 256K x (1) 256K x NONE NONE 36 36 4MB (4) 1M x 9 NONE NONE NONE 4MB (1) 1M x 36 NONE NONE NONE 6MB (4) 256K x 9 (4) 256K x 9 (1) 1M x 36 NONE 8MB (4) 1M x 9 (4) 1M x 9 NONE NONE 8MB (1) 1M x 36 (1) 1M x 36 NONE NONE 10MB (4) 256K x 9 (4) 256K x 9 (1) 1M x 36 (1) 1M x 36 12MB (4) 1M x 9 (4) 1M x 9 (1) 1M x 36 NONE 16MB (1) 1M x 36 (1) 1M x 36 (4) 1M x 9 (4) 1M x 9 16MB (4) 1M x 9 (4) 1M x 9 (1) 1M x 36 (1) 1M x 36 16MB (1) 4M x 36 NONE NONE NONE 16MB (4) 4M x 9 NONE NONE NONE 18MB (4) 256K x 9 (4) 256K x 9 (1) 4M x 36 NONE 20MB (4) 1M x 9 (4) 4M x 9 NONE NONE 20MB (1) 1M x 36 (1) 4M x 36 NONE NONE 24MB (4) 1M x 9 (4) 1M x 9 (1) 4M x 36 NONE 24MB (1) 4M x 36 (1) 1M x 36 (4) 1M x 9 NONE 32MB (1) 4M x 36 (1) 4M x 36 NONE NONE 32MB (4) 4M x 9 (4) 4M x 9 NONE NONE 36MB (1) 1M x 36 (4) 4M x 9 (4) 4M x 9 NONE 36MB (4) 4M x 9 (4) 4M x 9 (1) 1M x 36 NONE 36MB (1) 4M x 36 (1) 4M x 36 (4) 1M x 9 NONE 40MB (1) 1M x 36 (1) 1M x 36 (4) 4M x 9 (4) 4M x 9 40MB (4) 4M x 9 (4) 4M x 9 (1) 1M x 36 (1) 1M x 36 40MB (1) 4M x 36 (1) 4M x 36 (4) 1M x 9 (4) 1M x 9 40MB (4) 1M x 9 (4) 1M x 9 (1) 4M x 36 (1) 4M x 36 48MB (4) 4M x 9 (4) 4M x 9 (1) 4M x 36 NONE 48MB (1) 4M x 36 (1) 4M x 36 (4) 4M x 9 NONE 64MB (4) 4M x 9 (4) 4M x 9 (1) 4M x 36 (1) 4M x 36 64MB (1) 4M x 36 (1) 4M x 36 (4) 4M x 9 (4) 4M x 9 DRAM JUMPER CONFIGURATION Type JP1 JP2 JP20 JP21 Option 1 pins 1 & 2 pins 1 & 2 pins 1 & 2 pins 1 & 2 closed closed closed closed Option 2 pins 2 & 3 pins 2 & 3 pins 2 & 3 pins 2 & 3 closed closed closed closed Note: Option 1- Banks 0 & 1 use x 9 SIMMS and Banks 2 & 3 use X 36 SIMMS. Option 2- Banks 0 & 1 use x 36 SIMMS and Banks 2 & 3 use X 9 SIMMS. CACHE CONFIGURATION Size Bank 0 Bank 1 32KB (4) 8K x 8 NONE 64KB (4) 8K x 8 (4) 8K x 8 128KB (4) 32K x 8 NONE 256KB (4) 32K x 8 (4) 32K x 8 CACHE JUMPER CONFIGURATION Size JP8 JP9 JP10 JP11 32KB pins 1 & 2 pins 1 & 2 pins 1 & 2 pins 1 & 2 closed closed closed closed 64KB pins 2 & 3 pins 1 & 2 pins 1 & 2 pins 2 & 3 closed closed closed closed 128KB pins 2 & 3 pins 2 & 3 pins 1 & 2 pins 2 & 3 closed closed closed closed 256KB pins 2 & 3 pins 2 & 3 pins 2 & 3 pins 2 & 3 closed closed closed closed CACHE JUMPER CONFIGURATION (CON'T) Size JP12 JP13 JP14 JP15 JP16 32KB 1 & 2 1 & 2 1 & 2 1 & 2 1 & 2 64KB 1 & 2 1 & 2 2 & 3 2 & 3 1 & 2 128KB 2 & 3 1 & 2 1 & 2 1 & 2 2 & 3 256KB 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 Note: Pins designated should be in the closed position. CPU TYPE CONFIGURATION Type JP4 JP5 JP6 80486SX pins 2 & 3 Open Open closed ODP486SX pins 1 & 2 Closed pins 2 & 3 closed closed 80487SX pins 1 & 2 Closed pins 2 & 3 closed closed 80486DX pins 1 & 2 Closed pins 1 & 2 closed closed 80486DX2 pins 1 & 2 Closed pins 1 & 2 closed closed CPU SPEED CONFIGURATION Speed JP3 16MHz pins 2 & 3 closed 20MHz pins 2 & 3 closed > 25MHz pins 1 & 2 closed MISCELLANEOUS TECHNICAL NOTE Note:Depending on board version, cache and accompanying jumpers may not be present.