UNIDENTIFIED
J-286P SYSTEM BOARD
| 
 Processor  | 
 80286 (exact location unknown)  | 
| 
 Processor Speed  | 
 12/16/20/24MHz  | 
| 
 Chip Set  | 
 Suntac  | 
| 
 Max. Onboard DRAM  | 
 5MB  | 
| 
 Cache  | 
 None  | 
| 
 BIOS  | 
 AMI  | 
| 
 Dimensions  | 
 220mm x 220mm  | 
| 
 I/O Options  | 
 Floppy drive interface (on some models), IDE interface (on some models)  | 
| 
 NPU Options  | 
 80287 (exact location unknown)  | 
| 
 CONNECTIONS  | |||
| 
 Purpose  | 
 Location  | 
 Purpose  | 
 Location  | 
| 
 Reset switch  | 
 J1  | 
 Speaker  | 
 J4  | 
| 
 Turbo switch  | 
 J2  | 
 Power LED & keylock  | 
 J5  | 
| 
 Turbo LED  | 
 J3  | 
 External battery  | 
 JP9  | 
| 
 USER CONFIGURABLE SETTINGS  | |||
| 
 Function  | 
 Jumper  | 
 Position  | |
| 
 »  | 
 Factory configured - do not alter  | 
 JP1  | 
 Open  | 
| 
 »  | 
 Factory configured - do not alter  | 
 JP2  | 
 Open  | 
| 
 »  | 
 Floppy drive interface enabled (interface location unknown)  | 
 JP5  | 
 Closed  | 
| 
 Floppy drive interface disabled  | 
 JP5  | 
 Open  | |
| 
 »  | 
 Monitor type select monochrome  | 
 JP12  | 
 Open  | 
| 
 Monitor type select color  | 
 JP12  | 
 Closed  | |
| 
 »  | 
 Parity check enabled  | 
 JP13  | 
 Closed  | 
| 
 Parity check disabled  | 
 JP13  | 
 Open  | |
| 
 DRAM CONFIGURATION  | ||||||
| 
 Size  | 
 Bank 0  | 
 Bank 1  | 
 Bank 2  | 
 Parity 2  | 
 Bank 3  | 
 Parity 3  | 
| 
 1MB  | 
 NONE  | 
 NONE  | 
 (4) 44256  | 
 (4) 41256  | 
 (4) 44256  | 
 (4) 41256  | 
| 
 1MB  | 
 (2) 256K x 9  | 
 (2) 256K x 9  | 
 NONE  | 
 NONE  | 
 NONE  | 
 NONE  | 
| 
 2MB  | 
 (2) 256K x 9  | 
 (2) 256K x 9  | 
 (4) 44256  | 
 (4) 41256  | 
 (4) 44256  | 
 (4) 41256  | 
| 
 2MB  | 
 (2) 1M x 9  | 
 NONE  | 
 NONE  | 
 NONE  | 
 NONE  | 
 NONE  | 
| 
 3MB  | 
 (2) 1M x 9  | 
 NONE  | 
 (4) 44256  | 
 (4) 41256  | 
 (4) 44256  | 
 (4) 41256  | 
| 
 4MB  | 
 (2) 1M x 9  | 
 (2) 1M x 9  | 
 NONE  | 
 NONE  | 
 NONE  | 
 NONE  | 
| 
 5MB  | 
 (2) 1M x 9  | 
 (2) 1M x 9  | 
 (4) 44256  | 
 (4) 41256  | 
 (4) 44256  | 
 (4) 41256  | 
| 
 DRAM JUMPER CONFIGURATION  | ||||
| 
 Size  | 
 JP8  | 
 JP9  | 
 JP10  | 
 JP11  | 
| 
 1MB  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 closed  | 
| 
 1MB  | 
 pins 1 & 2 closed  | 
 pins 1 & 2 closed  | 
 pins 1 & 2 closed  | 
 pins 1 & 2 closed  | 
| 
 2MB  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 closed  | 
| 
 2MB  | 
 pins 1 & 2 closed  | 
 pins 1 & 2 closed  | 
 pins 1 & 2 closed  | 
 pins 1 & 2 closed  | 
| 
 3MB  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 closed  | 
| 
 4MB  | 
 pins 1 & 2 closed  | 
 pins 1 & 2 closed  | 
 pins 1 & 2 closed  | 
 pins 1 & 2 closed  | 
| 
 5MB  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 closed  | 
| 
 IDE INTERFACE CONFIGURATION  | ||
| 
 Setting  | 
 JP3  | 
 JP4  | 
| 
 Enabled  | 
 Closed  | 
 Open  | 
| 
 Disabled  | 
 Open  | 
 Closed  | 
| 
 Note: The location of the interface is unknown. Interface is an option and may not be present.  | ||
| 
 CPU SPEED CONFIGURATION  | ||
| 
 System speed  | 
 Bus speed  | 
 JP20  | 
| 
 12MHz  | 
 6MHz  | 
 pins 1 & 2 closed  | 
| 
 16MHz  | 
 8MHz  | 
 pins 1 & 2 closed  | 
| 
 20MHz  | 
 8MHz  | 
 pins 2 & 3 closed  | 
| 
 24MHz  | 
 8MHz  | 
 pins 2 & 3 closed  |