FIRST INTERNATIONAL COMPUTER, INC. 486-20/25/33/50SC (REV. A) Processor 80486SX/80486DX Processor Speed 20/25/33/50MHz Chip Set Symphony Max. Onboard DRAM 32MB Cache 64/128/256/1024KB BIOS AMI Dimensions 330.2mm x 218.4mm I/O Options None NPU Options 4167 [Image] CONNECTIONS Purpose Location Purpose Location Turbo switch JP12 Speaker JP18 Turbo LED JP14 Power LED & keylock JP19 Reset switch JP17 USER CONFIGURABLE SETTINGS Function Jumper/Switch Position » Factory configured - do not JP4 pins 2 & 3 alter closed » CPU speed select iOSC/2 JP5/6 Off CPU speed select iOSC/1 JP5/6 On » Monitor type select JP5/8 Off monochrome Monitor type select color JP5/8 On » Factory configured - do not JP20 pins 1 & 2 alter closed » Factory configured - do not JP21 pins 1 & 2 alter 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 5MB (4) 1M x 9 (4) 256K x 9 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 CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 64KB (4) 8K x 8 (4) 8K x 8 (1) 8K x 8 128KB (4) 32K x 8 NONE (1) 32K x 8 256KB (4) 32K x 8 (4) 32K x 8 (1) 32K x 8 1024KB (4) 128K x 8 (4) 128K x 8 (1) 128K x 8 CACHE JUMPER CONFIGURATION Size JP3 JP6 JP7 JP8 JP9 JP10 JP11 JP13 JP15 JP16 64KB 1 & 2 & 1 & 2 & 1 & 1 & 1 & 2 & 2 & 2 & 3 2 3 2 3 2 2 2 3 3 128KB 1 & 1 & Open 1 & 1 & 1 & 2 & open 1 & 1 & 2 2 2 2 2 2 3 2 256KB 1 & 2 & 2 & 2 & 1 & 2 & 2 & 2 & 2 & 2 & 3 2 3 3 3 2 3 3 3 3 1024KB 2 & 2 & 2 & 2 & 2 & 2 & 2 & 2 & 2 & 2 & 3 3 3 3 3 3 3 3 3 3 Note:Pins designated should be in the closed position. CACHE SWITCH CONFIGURATION Size JP5/3 JP5/4 JP5/5 JP5/7 64KB Off Off Off On 128KB On On On Off 256KB Off Off Off On 1024KB Off Off Off On CPU TYPE CONFIGURATION Type JP2 JP5/1 JP5/2 80486SX pins 2 & 3 Off Off closed 80486DX pins 1 & 2 On On closed