
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

[Image]

                                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       NONE
                                                    9

     2MB         (4) 44256       (4) 44256      (2) 256K x     (2) 256K x
                                                    9              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    pins 1 & 2     pins 1 & 2
                                  closed         closed         closed

     COM1          Disabled      pins 1 & 2    pins 2 & 3     pins 1 & 2
                                  closed         closed         closed

   Disabled          COM1        pins 2 & 3    pins 1 & 2     pins 2 & 3
                                  closed         closed         closed

     COM2            COM1        pins 2 & 3    pins 1 & 2     pins 1 & 2
                                  closed         closed         closed

     COM2          Disabled      pins 2 & 3    pins 2 & 3     pins 1 & 2
                                  closed         closed         closed

   Disabled          COM2        pins 1 & 2    pins 1 & 2     pins 2 & 3
                                  closed         closed         closed

   Disabled        Disabled         N/A        pins 2 & 3     pins 2 & 3
                                                 closed         closed

                        PARALLEL PORT CONFIGURATION

        LPT               J19                J20               J21

       LPT1            pins 1 & 2         pins 2 & 3        pins 1 & 2
                         closed            closed             closed

       LPT2            pins 1 & 2         pins 1 & 2        pins 1 & 2
                         closed            closed             closed

       LPT3            pins 2 & 3         pins 1 & 2        pins 1 & 2
                         closed            closed             closed

     Disabled          pins 2 & 3         pins 2 & 3        pins 2 & 3
                         closed            closed             closed

. [Image]

                         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

