UNIDENTIFIED 80386SX MOTHERBOARD Processor 80386SX Processor Speed 16MHz Chip Set NEAT Max. Onboard DRAM 8MB Cache None BIOS AMI Dimensions 330mm x 218mm I/O Options None NPU Options 80387SX [Image] CONNECTIONS Purpose Location Purpose Location Power LED & keylock J1 Reset switch J4 Speaker J2 Turbo LED J5 Turbo switch J3 External battery J6 USER CONFIGURABLE SETTINGS Function Jumper Position » Turbo enabled J3 pins 1 & 2 closed Turbo disabled J3 pins 2 & 3 closed » Battery type select internal J6 pins 1 & 2 closed Battery type select external J6 Closed CMOS memory clear J6 pins 3 & 4 closed » Pipeline enabled JP3 Closed Pipeline disabled JP3 Open » NPU asynchronous with CPU JP4 Closed NPU synchronous with CPU JP4 Open NPU enabled JP5 Closed NPU disabled JP5 Open » Clock select 80386SX clock 2 JP6 pins 2 & 3 closed Clock select 80387SX clock 2 JP6 pins 1 & 2 closed » BIOS type select 27256 JP7 pins 1 & 2 closed BIOS type select 27128 JP7 pins 2 & 3 closed » Monitor type select monochrome JP8 pins 2 & 3 closed Monitor type select color/EGA/VGA JP8 pins 1 & 2 closed » BIOS pin select 23 pin JP9 pins 1 & 2 closed BIOS pin select 30 pin JP9 pins 2 & 3 closed DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 512KB (2) 256K x NONE NONE NONE 9 512KB NONE NONE (18) 41256 NONE 1MB (2) 256K x (2) 256K x NONE NONE 9 9 1MB NONE NONE (18) 41256 (18) 41256 1.5MB (2) 256K x (2) 256K x (18) 41256 NONE 9 9 1.5MB (2) 256K x NONE (18) 41256 (18) 41256 9 2MB (2) 256K x (2) 256K x (18) 41256 (18) 41256 9 9 2MB (2) 1M x 9 NONE NONE NONE 2MB NONE NONE (18) 411000 (18) 411000 4MB (2) 1M x 9 (2) 1M x 9 NONE NONE 4MB (2) 1M x 9 NONE (18) 411000 (18) 411000 5MB (2) 1M x 9 (2) 1M x 9 (18) 41256 (18) 41256 5MB (2) 1M x 9 (2) 1M x 9 (18) 411000 NONE 5MB (2) 1M x 9 (2) 1M x 9 (18) 41256 (18) 41256 6MB (2) 1M x 9 (2) 1M x 9 (18) 411000 (18) 411000 6MB (2) 1M x 9 (2) 1M x 9 (18) 411000 (18) 411000 8MB (2) 4M x 9 (2) 4M x 9 NONE NONE DRAM JUMPER CONFIGURATION Size JP1 JP2 512KB 1 & 2, 3 & 4, 5 & 6, 7 & 8, 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12 9 & 10, 11 & 12 512KB 1 & 12, 2 & 11, 3 & 10, 4 & 1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7 9, 5 & 8, 6 & 7 1MB 1 & 2, 3 & 4, 5 & 6, 7 & 8, 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12 9 & 10, 11 & 12 1MB 1 & 12, 2 & 11, 3 & 10, 4 & 1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7 9, 5 & 8, 6 & 7 1.5MB 1 & 2, 3 & 4, 5 & 6, 7 & 8, 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12 9 & 10, 11 & 12 1.5MB 1 & 12, 2 & 11, 3 & 10, 4 & 1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7 9, 5 & 8, 6 & 7 2MB 1 & 2, 3 & 4, 5 & 6, 7 & 8, 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12 9 & 10, 11 & 12 2MB 1 & 2, 3 & 4, 5 & 6, 7 & 8, 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12 9 & 10, 11 & 12 2MB 1 & 12, 2 & 11, 3 & 10, 4 & 1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7 9, 5 & 8, 6 & 7 4MB 1 & 2, 3 & 4, 5 & 6, 7 & 8, 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12 9 & 10, 11 & 12 4MB 1 & 12, 2 & 11, 3 & 10, 4 & 1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7 9, 5 & 8, 6 & 7 5MB 1 & 2, 3 & 4, 5 & 6, 7 & 8, 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12 9 & 10, 11 & 12 5MB 1 & 2, 3 & 4, 5 & 6, 7 & 8, 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12 9 & 10, 11 & 12 5MB 1 & 12, 2 & 11, 3 & 10, 4 & 1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7 9, 5 & 8, 6 & 7 6MB 1 & 2, 3 & 4, 5 & 6, 7 & 8, 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12 9 & 10, 11 & 12 6MB 1 & 12, 2 & 11, 3 & 10, 4 & 1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7 9, 5 & 8, 6 & 7 8MB 1 & 2, 3 & 4, 5 & 6, 7 & 8, 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12 9 & 10, 11 & 12 Note: Pins designated should be in the closed position.