COMMODORE BUSINESS MACHINES, INC.
286 System (Part #368987-01 Rev B)
| 
 Processor  | 
 80286  | 
| 
 Processor Speed  | 
 8/10MHz  | 
| 
 Chip Set  | 
 Unidentified  | 
| 
 Max. Onboard DRAM  | 
 16MB  | 
| 
 Cache  | 
 None  | 
| 
 BIOS  | 
 Commodore  | 
| 
 Dimensions  | 
 254mm x 218mm  | 
| 
 I/O Options  | 
 16-bit riser card slot, bus mouse port, floppy interface, game port, IDE interface, parallel port, serial ports (2)  | 
| 
 NPU Options  | 
 80287  | 
| 
 CONNECTIONS  | |||
| 
 Purpose  | 
 Location  | 
 Purpose  | 
 Location  | 
| 
 16-bit riser card  | 
 CN1  | 
 Drive power  | 
 DPWR  | 
| 
 Serial port 1  | 
 CN2  | 
 Floppy drive interface  | 
 FDD  | 
| 
 Serial port 2  | 
 CN3  | 
 Game port  | 
 GAM  | 
| 
 Parallel port  | 
 CN4  | 
 IDE drive interface  | 
 IDE  | 
| 
 Bus mouse port  | 
 CN5  | ||
| 
 USER CONFIGURABLE SETTINGS  | |||
| 
 Function  | 
 Jumper  | 
 Position  | |
| » | 
 Battery type select internal  | 
 J10  | 
 pins 2 & 3 closed  | 
| 
 Battery type select external  | 
 J10  | 
 pins 1 & 2 closed  | |
| » | 
 Monitor type select monochrome  | 
 J12  | 
 Closed  | 
| 
 Monitor type select color  | 
 J12  | 
 Open  | |
| » | 
 IDE interface enabled  | 
 J14  | 
 pins 1 & 2 closed  | 
| 
 IDE interface disabled  | 
 J14  | 
 pins 2 & 3 closed  | |
| » | 
 Floppy drive interface enabled  | 
 J15  | 
 pins 1 & 2 closed  | 
| 
 Floppy drive interface disabled  | 
 J15  | 
 pins 2 & 3 closed  | |
| 
 DRAM CONFIGURATION  | ||||
| 
 Size  | 
 Bank 0  | 
 Bank 1  | 
 Bank 2  | 
 Bank 3  | 
| 
 512KB  | 
 (4) 44256  | 
 NONE  | 
 NONE  | 
 NONE  | 
| 
 1MB  | 
 (4) 44256  | 
 (4) 44256  | 
 NONE  | 
 NONE  | 
| 
 1.5MB  | 
 (4) 44256  | 
 (4) 44256  | 
 (2) 256K x 9  | 
 NONE  | 
| 
 2MB  | 
 (4) 44256  | 
 (4) 44256  | 
 (2) 256K x 9  | 
 (2) 256K x 9  | 
| 
 2MB  | 
 (4) 441000  | 
 NONE  | 
 NONE  | 
 NONE  | 
| 
 3MB  | 
 (4) 44256  | 
 (4) 44256  | 
 (2) 1M x 9  | 
 NONE  | 
| 
 4MB  | 
 NONE  | 
 NONE  | 
 (2) 1M x 9  | 
 (2) 1M x 9  | 
| 
 4MB  | 
 (4) 441000  | 
 (4) 441000  | 
 NONE  | 
 NONE  | 
| 
 5MB  | 
 (4) 44256  | 
 (4) 44256  | 
 (2) 1M x 9  | 
 (2) 1M x 9  | 
| 
 8MB  | 
 (4) 444000  | 
 NONE  | 
 NONE  | 
 NONE  | 
| 
 16MB  | 
 (4) 444000  | 
 (4) 444000  | 
 NONE  | 
 NONE  | 
| 
 16MB  | 
 NONE  | 
 NONE  | 
 (2) 4M x 9  | 
 (2) 4M x 9  | 
| 
 DRAM JUMPER CONFIGURATION  | ||
| 
 Size  | 
 J6  | 
 J7  | 
| 
 512KB  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 closed  | 
| 
 1MB  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 closed  | 
| 
 1.5MB  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 closed  | 
| 
 2MB  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 closed  | 
| 
 2MB  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 closed  | 
| 
 3MB  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 closed  | 
| 
 4MB  | 
 pins 1 & 2 closed  | 
 pins 1 & 2 closed  | 
| 
 4MB  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 closed  | 
| 
 5MB  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 closed  | 
| 
 8MB  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 closed  | 
| 
 16MB  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 closed  | 
| 
 16MB  | 
 pins 1 & 2 closed  | 
 pins 1 & 2 closed  | 
| 
 SERIAL PORT CONFIGURATION  | ||||
| 
 CN1  | 
 CN2  | 
 J16  | 
 J17  | 
 J18  | 
| 
 COM1  | 
 COM2  | 
 pins 1 & 2 closed  | 
 pins 1 & 2 closed  | 
 pins 1 & 2 closed  | 
| 
 COM1  | 
 Disabled  | 
 pins 1 & 2 closed  | 
 pins 2 & 3 closed  | 
 pins 1 & 2 closed  | 
| 
 Disabled  | 
 COM1  | 
 pins 2 & 3 closed  | 
 pins 1 & 2 closed  | 
 pins 2 & 3 closed  | 
| 
 COM2  | 
 COM1  | 
 pins 2 & 3 closed  | 
 pins 1 & 2 closed  | 
 pins 1 & 2 closed  | 
| 
 COM2  | 
 Disabled  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 closed  | 
 pins 1 & 2 closed  | 
| 
 Disabled  | 
 COM2  | 
 pins 1 & 2 closed  | 
 pins 1 & 2 closed  | 
 pins 2 & 3 closed  | 
| 
 Disabled  | 
 Disabled  | 
 N/A  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 closed  | 
| 
 PARALLEL PORT CONFIGURATION  | |||
| 
 LPT  | 
 J19  | 
 J20  | 
 J21  | 
| 
 LPT1  | 
 pins 1 & 2 closed  | 
 pins 2 & 3 closed  | 
 pins 1 & 2 closed  | 
| 
 LPT2  | 
 pins 1 & 2 closed  | 
 pins 1 & 2 closed  | 
 pins 1 & 2 closed  | 
| 
 LPT3  | 
 pins 2 & 3 closed  | 
 pins 1 & 2 closed  | 
 pins 1 & 2 closed  | 
| 
 Disabled  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 closed  | 
 pins 2 & 3 closed  | 
.
| 
 VIDEO BOARD CONFIGURATION  | |||
| 
 Function  | 
 Jumper  | 
 Position  | |
| » | 
 VGA board enabled  | 
 J1  | 
 Closed  | 
| 
 VGA board disabled (VESA enabled)  | 
 J1  | 
 Open  | |
| » | 
 VGA 1024 x 768 mode disabled  | 
 J2  | 
 Open  | 
| 
 VGA 1024 x 768 mode enabled  | 
 J2  | 
 Closed  | |
| » | 
 Monitor type select color  | 
 J3  | 
 Open  | 
| 
 Monitor type select monochrome  | 
 J3  | 
 Closed  | |