UNIDENTIFIED 386SX25/20/16 Processor 80386SX Processor Speed 16/20/25MHz Chip Set OPTI Max. Onboard DRAM 16MB Cache None BIOS AMI Dimensions 223mm x 218mm I/O Options None NPU Options 80387SX [Image] CONNECTIONS Purpose Location Purpose Location External battery JP2 Reset switch JP10 Speaker JP8 Turbo switch JP11 Power LED & keylock JP9 Turbo LED JP12 USER CONFIGURABLE SETTINGS Function Jumper Position » Monitor type select monochrome JP1 Open Monitor type select color JP1 Closed » CMOS memory normal operation JP3 pins 2 & 3 closed CMOS memory clear JP3 pins 1 & 2 closed DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Parity Bank 3 Parity (P-2) (P-3) 1MB (2) (2) NONE NONE NONE NONE 256K x 256K x 9 9 1MB NONE NONE (4) (2) (4) (2) 41256 44256 41256 44256 2MB (2) (2) (4) (2) (4) (2) 41256 256K x 256K x 44256 41256 44256 9 9 3MB (2) (2) (4) (2) NONE NONE 256K x 256K x 441000 411000 9 9 3MB (2) 1M NONE (4) (2) (4) (2) 41256 x 9 44256 41256 44256 4MB (2) 1M (2) 1M NONE NONE NONE NONE x 9 x 9 4MB NONE NONE (4) (2) (4) (2) 441000 411000 441000 411000 5MB (2) 1M (2) 1M (4) (2) (4) (2) 41256 x 9 x 9 44256 41256 44256 5MB (2) (2) (4) (2) (4) (2) 256K x 256K x 441000 411000 441000 411000 9 9 6MB (2) 1M (2) 1M (4) (2) NONE NONE x 9 x 9 441000 411000 6MB (2) 1M NONE (4) (2) (4) (2) x 9 441000 411000 441000 411000 8MB (2) 1M (2) 1M (4) (2) (4) (2) x 9 x 9 441000 411000 441000 411000 10MB (2) 1M (2) 4M NONE NONE NONE NONE x 9 x 9 12MB (2) 4M NONE (4) (2) (4) (2) x 9 441000 411000 441000 411000 16MB (2) 4M (2) 4M NONE NONE NONE NONE x 9 x 9 DRAM JUMPER CONFIGURATION Size JP4 JP5 JP6 JP7 JP8 JP9 1MB 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 1MB 1 & 2 1 & 2 1 & 2 1 & 2 1 & 2 1 & 2 2MB 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 3MB 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 3MB 1 & 2 1 & 2 1 & 2 1 & 2 1 & 2 1 & 2 4MB 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 4MB 1 & 2 1 & 2 1 & 2 1 & 2 1 & 2 1 & 2 5MB 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 5MB 1 & 2 1 & 2 1 & 2 1 & 2 1 & 2 1 & 2 6MB 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 6MB 1 & 2 1 & 2 1 & 2 1 & 2 1 & 2 1 & 2 8MB 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 10MB 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 12MB 1 & 2 1 & 2 1 & 2 1 & 2 1 & 2 1 & 2 16MB 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 2 & 3 Note:Pins designated should be in the closed position.