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  | 
| 
 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 9  | 
 NONE  | 
 NONE  | 
 NONE  | 
| 
 512KB  | 
 NONE  | 
 NONE  | 
 (18) 41256  | 
 NONE  | 
| 
 1MB  | 
 (2) 256K x 9  | 
 (2) 256K x 9  | 
 NONE  | 
 NONE  | 
| 
 1MB  | 
 NONE  | 
 NONE  | 
 (18) 41256  | 
 (18) 41256  | 
| 
 1.5MB  | 
 (2) 256K x 9  | 
 (2) 256K x 9  | 
 (18) 41256  | 
 NONE  | 
| 
 1.5MB  | 
 (2) 256K x 9  | 
 NONE  | 
 (18) 41256  | 
 (18) 41256  | 
| 
 2MB  | 
 (2) 256K x 9  | 
 (2) 256K x 9  | 
 (18) 41256  | 
 (18) 41256  | 
| 
 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, 9 & 10, 11 & 12  | 
 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12  | 
| 
 512KB  | 
 1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7  | 
 1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7  | 
| 
 1MB  | 
 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12  | 
 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12  | 
| 
 1MB  | 
 1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7  | 
 1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7  | 
| 
 1.5MB  | 
 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12  | 
 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12  | 
| 
 1.5MB  | 
 1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7  | 
 1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7  | 
| 
 2MB  | 
 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12  | 
 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12  | 
| 
 2MB  | 
 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12  | 
 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12  | 
| 
 2MB  | 
 1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7  | 
 1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7  | 
| 
 4MB  | 
 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12  | 
 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12  | 
| 
 4MB  | 
 1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7  | 
 1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7  | 
| 
 5MB  | 
 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12  | 
 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12  | 
| 
 5MB  | 
 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12  | 
 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12  | 
| 
 5MB  | 
 1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7  | 
 1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7  | 
| 
 6MB  | 
 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12  | 
 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12  | 
| 
 6MB  | 
 1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7  | 
 1 & 12, 2 & 11, 3 & 10, 4 & 9, 5 & 8, 6 & 7  | 
| 
 8MB  | 
 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12  | 
 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12  | 
| 
 Note: Pins designated should be in the closed position.  | ||