NORTHGATE COMPUTER SYSTEMS, INC.
SUPERMICRO 286
| 
 Processor  | 
 80286  | 
| 
 Processor Speed  | 
 12/16/20MHz  | 
| 
 Chip Set  | 
 VLSI  | 
| 
 Max. Onboard DRAM  | 
 4MB  | 
| 
 SRAM Cache  | 
 None  | 
| 
 BIOS  | 
 Award  | 
| 
 Dimensions  | 
 355mm x 304mm  | 
| 
 I/O Options  | 
 16-bit onboard bus memory slot, parallel port, serial port (2)  | 
| 
 NPU Options  | 
 80287  | 
| 
 CONNECTIONS  | |||
| 
 Purpose  | 
 Location  | 
 Purpose  | 
 Location  | 
| 
 Reset switch  | 
 J1  | 
 Parallel port  | 
 J201  | 
| 
 Speaker  | 
 J2  | 
 Serial port 2 (COM2)  | 
 J202  | 
| 
 External battery  | 
 J3  | 
 Serial port 1 (COM1)  | 
 J203  | 
| 
 Turbo LED  | 
 J5  | 
 16-bit onboard bus memory slot  | 
 S1  | 
| 
 Power LED & keylock  | 
 J6  | ||
| 
 USER CONFIGURABLE SETTINGS  | |||
| 
 Function  | 
 Jumper/Switch  | 
 Position  | |
| » | 
 RAM select 0 wait states  | 
 W3  | 
 On  | 
| 
 RAM select 1 wait state  | 
 W3  | 
 Off  | |
| » | 
 ROM select 0 wait states  | 
 W4  | 
 On  | 
| 
 ROM select 1 wait state  | 
 W4  | 
 Off  | |
| » | 
 Monitor type select color  | 
 W10  | 
 pins 2 & 3 closed  | 
| 
 Monitor type select monochrome  | 
 W10  | 
 pins 1 & 2 closed  | |
| » | 
 CPU speed select high  | 
 W11  | 
 Open  | 
| 
 CPU speed select low  | 
 W11  | 
 pins 2 & 3 closed  | |
| 
 CPU speed select keyboard control  | 
 W11  | 
 pins 1 & 2 closed  | |
| 
 DRAM CONFIGURATION  | ||||
| 
 Size  | 
 Bank 0  | 
 Bank 1  | 
 W6  | 
 W7  | 
| 
 512KB  | 
 (18) 41256  | 
 NONE  | 
 Off  | 
 On  | 
| 
 1MB  | 
 (18) 41256  | 
 (18) 41256  | 
 Off  | 
 Off  | 
| 
 2MB  | 
 (18) 411000  | 
 NONE  | 
 On  | 
 On  | 
| 
 4MB  | 
 (18) 411000  | 
 (18) 411000  | 
 On  | 
 Off  | 
| 
 MEMORY SPEED CONFIGURATION  | |
| 
 Speed  | 
 W5  | 
| 
 60ns  | 
 pins 1 & 2 closed  | 
| 
 80ns  | 
 pins 1 & 2, 3 & 4 closed  | 
| 
 100ns  | 
 pins 2 & 3 closed  | 
| 
 Note:Speed is factory configured and should not be altered.  | |
| 
 NPU SPEED CONFIGURATION  | |||
| 
 Speed  | 
 OSC  | 
 W1  | 
 W2  | 
| 
 7.15MHz  | 
 7.15MHz  | 
 pins 1 & 2 closed  | 
 pins 3 & 4 closed  | 
| 
 7.15MHz  | 
 21.45MHz  | 
 pins 2 & 3 closed  | 
 pins 3 & 4 closed  | 
| 
 10.00MHz  | 
 10.00MHz  | 
 pins 1 & 2 closed  | 
 Pins 5 & 6 closed  | 
| 
 10.00MHz  | 
 30.00MHz  | 
 pins 2 & 3 closed  | 
 Pins 5 & 6 closed  | 
| 
 14.32MHz  | 
 14.32MHz  | 
 pins 1 & 2 closed  | 
 pins 1 & 2 closed  | 
| 
 14.32MHz  | 
 42.96MHz  | 
 pins 2 & 3 closed  | 
 pins 1 & 2 closed  | 
| 
 SERIAL PORT CONFIGURATION  | |||||
| 
 Port 1 (J203)  | 
 Port 2 (J202)  | 
 SW201/1  | 
 SW201/2  | 
 SW202/1  | 
 SW202/2  | 
| 
 COM1/IRQ4  | 
 COM2/IRQ3  | 
 Off  | 
 Off  | 
 On  | 
 On  | 
| 
 COM1/IRQ4  | 
 Disabled  | 
 Off  | 
 On  | 
 On  | 
 Off  | 
| 
 Disabled  | 
 COM2/IRQ3  | 
 Off  | 
 On  | 
 Off  | 
 On  | 
| 
 Disabled  | 
 Disabled  | 
 On  | 
 On  | 
 N/A  | 
 N/A  | 
| 
 PARALLEL PORT CONFIGURATION  | |||||
| 
 LPT  | 
 IRQ  | 
 SW201/3  | 
 SW201/4  | 
 SW202/3  | 
 SW202/4  | 
| 
 LPT1  | 
 IRQ5  | 
 Off  | 
 Off  | 
 On  | 
 Off  | 
| 
 LPT1  | 
 IRQ7  | 
 Off  | 
 Off  | 
 Off  | 
 On  | 
| 
 LPT2  | 
 IRQ5  | 
 Off  | 
 On  | 
 On  | 
 Off  | 
| 
 LPT2  | 
 IRQ7  | 
 Off  | 
 On  | 
 Off  | 
 On  | 
| 
 Disabled  | 
 N/A  | 
 On  | 
 N/A  | 
 N/A  | 
 N/A  |