
AMPRO COMPUTERS, INC.

LITTLE BOARD/PC

Processor                  8088
Processor Speed            7MHz
Chip Set                   Unidentified
Video Chip Set             None
Maximum Onboard Memory     640KB
Maximum Video Memory       None
Cache                      None
BIOS                       Ampro
Dimensions                 203mm x 146mm
I/O Options                Floppy drive interface, SCSI connector,
                           parallel port, serial ports (2), PC bus
                           interface
NPU Options                NEC uPD72191

[Image]

                                CONNECTIONS

  Purpose                 Location      Purpose                Location

  Serial port (V40)          J2         Keyboard connector        J5

  Serial port                J3         Parallel port             J6

  Speaker                J4 pins 1 &    SCSI interface            J7
                              2

  Reset switch           J4 pins 3 &    Floppy drive              J8
                              4         interface

  Power LED              J4 pins 5 &    PC bus interface          J9
                              6

  Auxiliary power for    J4 pins 7 -
  PC bus connector           10

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

     DMA END (TC) signal disabled          W1               Open

      DMA END (TC) signal enabled           W1              Closed

     5v termination power to pin 26        W4               Open
      of SCSI disabled

      5v termination power to pin 26        W4              Closed
      of SCSI enabled

     PC bus IRQ5 disabled                  W6               Open

      PC bus IRQ5 enabled                   W6              Closed

     Factory configured - do not           W9               Open
      alter

     Floppy drive IRQ6 enabled             W10             Closed

      Floppy drive IRQ6 disabled            W10              Open

     Parallel port LPT select LPT1         W11              Open

      Parallel port LPT select LPT2         W11             Closed

     Factory configured - do not           W21          Unidentified
      alter

     Factory configured - do not           W22          Unidentified
      alter

     Factory configured - do not           W26          Unidentified
      alter

     Factory configured - do not           W27          Unidentified
      alter

     Factory configured - do not           W28          Unidentified
      alter

     NPU not installed                     W30              Open

      NPU installed                         W30             Closed

     Monitor type select CGA               W31             Closed

      Monitor type select monochrome        W31              Open

     Factory configured - do not           W34          Unidentified
      alter

     Write precomp speed select            W39              Open
      125ns

      Write precomp speed select            W39             Closed
      187ns

     Drive speed select single speed       W40              Open

      Drive speed select dual speed         W40             Closed

                          DRAM CONFIGURATION

       Size            Bank 0            Bank 1            Bank 2

      256KB        SIMM installed         None              None

      512KB        SIMM installed    SIMM installed         None

      640KB        SIMM installed    SIMM installed    SIMM installed

  Note: The size of the DRAM chips are unidentified.

  DRAM JUMPER CONFIGURATION

   Size      W19       W20

  256KB     Closed   Closed

  512KB      Open    Closed

  640KB     Closed    Open

                        PROM SOCKET SELECTION (U26)

     Type        Address        W35        W36         W37         W38

      Empty       N/A         Open        Open       Open         N/A

       2764       E0000h       Open        Open      Closed       Open

       2764       E4000h      Closed      Closed      Open        Open

       2764       E8000h       Open       Closed      Open        Open

       2764       EC000h      Closed       Open       Open        Open

       27256      E0000h       Open       Closed     Closed      Closed

       27256      E8000h      Closed       Open      Closed      Closed

       27512      E0000h      Closed      Closed     Closed      Closed

                          MEMORY OPTION SELECTION

    Type        W8       W12     W13     W14       W15      W16      W41

     None     Open     Open     Open    Open     Open      Open    Open

      2764    Closed    Closed   Open    Open     Open      Open    2 & 3

      27256    Open     Closed   Open   Closed    Closed    Open    2 & 3

      6264    Closed    Closed   Open    Open     Open     Closed   Open

      62256    Open     Closed   Open   Closed    Open     Closed   1 & 2

  Note: Pins designated should be in the closed position.

                       FLOPPY DMA CHANNEL SELECTION

         Channel                    W5                       W7

              1             Pins 1 & 2 closed        Pins 1 & 2 closed

             2             Pins 2 & 3 closed        Pins 2 & 3 closed

                        SCSI DMA CHANNEL SELECTION

         Channel                    W2                       W3

              1             Pins 2 & 3 closed        Pins 2 & 3 closed

             3             Pins 1 & 2 closed        Pins 1 & 2 closed

                       SERIAL PORT ADDRESS SELECTION

     Setting        Address      IRQ       W17         W18         W29

        COM1        3F8h -     IRQ4      Closed      Open        Open
        (3F8h)        3FF

         COM2        2F8h -     IRQ3       Open      Closed      Closed
        (2F8h)        2FF

                    FLOPPY DRIVE SELECTION

  Drives installed           W32                  W33

          1                 Closed               Closed

          2                 Closed                Open

  3 (not supported)          Open                Closed

  4 (not supported)          Open                 Open

                           SCSI BUS ID SELECTION

        ID                W23                W24               W25

           0            Closed             Closed             Closed

           1             Open              Closed             Closed

           2            Closed              Open              Closed

           3             Open               Open              Closed

           4            Closed             Closed              Open

           5             Open              Closed              Open

           6            Closed              Open               Open

          7             Open               Open               Open

