
AMPRO COMPUTERS, INC.

LITTLE BOARD/486I

Processor             80486DX2/80486DX4
Processor Speed       50(internal)/100(internal)MHz
Chip Set              OPTI
Video Chip Set        Unidentified
Maximum Onboard       64MB
Memory
Maximum Video Memory  1MB
Cache                 None
BIOS                  Award
Dimensions            203mm x 146mm
I/O Options           Ethernet 10BaseT connector, AUI connector, floppy
                      drive interface, IDE interface, SCSI-II interface,
                      parallel port, serial ports (4), VGA interface, flat
                      panel connector, external video overlay, LCD bias
                      supply, PC/104 connectors (2), utility/keyboard
                      connector
NPU Options           None

[Image]

                                CONNECTIONS

  Purpose              Location     Purpose                    Location

  Flat panel              J3        Serial port 1 & 2             J11
  connector

  LCD bias supply         J4        IDE interface                 J12

  VGA interface           J5        Serial port 3 & 4             J13

  External video          J6        Floppy drive interface        J14
  overlay

  Ethernet 10BaseT        J7        Parallel port                 J15
  connector

  AUI connector           J8        Utility/keyboard              J16
                                    connector

  SCSI-II interface       J9        PC/104 connector              P18

  DC power               J10        PC/104 connector              P20

  Note: Alternate external LAN media are available by means of AUI
  interface & optional MAUs.

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

      Negative vee enabled                  W1         Pins 1 & 2 closed

      Negative vee disabled                 W1         Pins 2 & 3 closed

     Factory configured - do not           W3           Unidentified
      alter

     Factory configured - do not           W8           Unidentified
      alter

     Factory configured - do not           W9           Unidentified
      alter

     Factory configured - do not           W10          Unidentified
      alter

     Factory configured - do not           W11          Unidentified
      alter

     Factory configured - do not           W12          Unidentified
      alter

     Factory configured - do not           W13          Unidentified
      alter

     Factory configured - do not           W16          Unidentified
      alter

      Watch dog timer select IOCHK          W17        Pins 1 & 2 closed

      Watch dog timer select RESET          W17        Pins 2 & 3 closed

     Factory configured - do not           W20          Unidentified
      alter

     Factory configured - do not           W22          Unidentified
      alter

      Low shift clock enabled               W23        Pins 1 & 2 closed

      High shift clock enabled              W23        Pins 2 & 3 closed

     Factory configured - do not           W24          Unidentified
      alter

                DRAM CONFIGURATION

      Size            Bank 0           Bank 1

       1MB        (1) 256K x 32         None

       2MB        (1) 512K x 32         None

       2MB        (1) 256K x 32    (1) 256K x 32

       4MB         (1) 1M x 32          None

       4MB        (1) 512K x 32    (1) 512K x 32

       8MB         (1) 2M x 32          None

       8MB         (1) 1M x 32      (1) 1M x 32

      12MB         (1) 2M x 32      (1) 1M x 32

      16MB         (1) 4M x 32          None

      17MB         (1) 4M x 32     (1) 256K x 32

      18MB         (1) 4M x 32     (1) 512K x 32

      20MB         (1) 4M x 32      (1) 1M x 32

      24MB         (1) 4M x 32      (1) 2M x 32

      32MB         (1) 8M x 32          None

      32MB         (1) 8M x 32      (1) 4M x 32

      34MB         (1) 8M x 32     (1) 512K x 32

      36MB         (1) 8M x 32      (1) 1M x 32

      40MB         (1) 8M x 32      (1) 2M x 32

      48MB         (1) 8M x 32      (1) 4M x 32

      64MB         (1) 8M x 32      (1) 8M x 32

                      VIDEO MEMORY CONFIGURATION

  Note: The location of the 512KB/1MB video memory is unidentified.

                    DMA CHANNEL SELECTION

       Channel               W18                  W19

          1            Pins 1 & 2 closed   Pins 1 & 2 closed

          3            Pins 2 & 3 closed   Pins 2 & 3 closed

                     SERIAL PORT 1 INTERRUPT SELECTION

           IRQ                      W4                       W6

     IRQ4 shared with        Pins 1 & 2 closed              Open
        serial 1

     IRQ4 not shared         Pins 2 & 3 closed             Closed

                     SERIAL PORT 2 INTERRUPT SELECTION

           IRQ                      W5                       W7

     IRQ3 shared with        Pins 1 & 2 closed              Open
        serial 2

     IRQ3 not shared         Pins 2 & 3 closed             Closed

                     BIOS SELECTION IN S0 & S1 (EPROM)

      Type             W2            W14           W15            W21

      27C64           Open        2 & 5, 7 &    2 & 5, 7 &       2 & 3
                                  8, 9 & 12,    8, 9 & 12,
                                   10 & 11       10 & 11

     27C128           Open        2 & 5, 7 &    2 & 5, 7 &       2 & 3
                                  8, 9 & 12,    8, 9 & 12,
                                   10 & 11       10 & 11

     27C256           Open        9 & 12, 14    9 & 12, 14       2 & 3
                                    & 15           & 15

     27C512           Open        9 & 12, 10    9 & 12, 10       2 & 3
                                  & 11, 14 &    & 11, 14 &
                                     15             15

     27C010           Open        9 & 12, 10    9 & 12, 10       2 & 3
                                    & 11           & 11

     27C020           Open        2 & 5, 7 &    2 & 5, 7 &       2 & 3
                                  8, 9 & 12,    8, 9 & 12,
                                   10 & 11       10 & 11

     27C040           Open        2 & 5, 4 &    2 & 5, 4 &       2 & 3
                                  7, 9 & 12,    7, 9 & 12,
                                 10 & 11, 13    10 & 11, 13
                                    & 14           & 14

     27C080           Open        4 & 7, 5 &    4 & 7, 5 &       2 & 3
                                  6, 9 & 12,    6, 9 & 12,
                                 10 & 11, 13    10 & 11, 13
                                    & 14           & 14

      28C64           Open        2 & 5, 7 &    2 & 5, 7 &       2 & 3
                                  8, 9 & 12,    8, 9 & 12,
                                   10 & 11       10 & 11

  Note: Pins designated should be in the closed position. W14 controls S0
  & W15 controls S1.

                  BIOS SELECTION IN S0 & S1 (FLASH BIOS)

      Type            W2            W14             W15           W21

     29C256          Open        8 & 11, 9 &    8 & 11, 9 &      2 & 3
                                12, 14 & 15     12, 14 & 15

     28C256          Open        8 & 9, 11 &    8 & 9, 11 &      2 & 3
                                12, 14 & 15     12, 14 & 15

     29F512          Open       4 & 5, 7 & 8,  4 & 5, 7 & 8,     2 & 3
                                9 & 12, 10 &    9 & 12, 10 &
                                11, 13 & 14     11, 13 & 14

     29F010          Open       4 & 5, 7 & 8,  4 & 5, 7 & 8,     2 & 3
                                9 & 12, 10 &    9 & 12, 10 &
                                11, 13 & 14     11, 13 & 14

     29F020          Open       4 & 5, 7 & 8,  4 & 5, 7 & 8,     2 & 3
                                9 & 12, 10 &    9 & 12, 10 &
                                11, 13 & 14     11, 13 & 14

     29F040          Open       4 & 5, 7 & 8,  4 & 5, 7 & 8,     2 & 3
                                9 & 12, 10 &    9 & 12, 10 &
                                11, 13 & 14     11, 13 & 14

     28F512          Open       2 & 5, 7 & 8,  2 & 5, 7 & 8,     2 & 3
                                9 & 12, 10 &    9 & 12, 10 &
                                11, 13 & 14     11, 13 & 14

     28F010          Open       2 & 5, 7 & 8,  2 & 5, 7 & 8,     2 & 3
                                9 & 12, 10 &    9 & 12, 10 &
                                11, 13 & 14     11, 13 & 14

     28F020          Open       2 & 5, 7 & 8,  2 & 5, 7 & 8,     2 & 3
                                9 & 12, 10 &    9 & 12, 10 &
                                11, 13 & 14     11, 13 & 14

  Note: Pins designated should be in the closed position. W14 controls S0
  & W15 controls S1.

                 BIOS SELECTION IN S0 & S1 (SRAM & NOVRAM)

      Type             W2            W14            W15           W21

     BQ4013Y          Open       7 & 10, 8 &    7 & 10, 8 &      2 & 3
                                 9, 11 & 12,    9, 11 & 12,
                                   14 & 15        14 & 15

     BQ4015Y          Open        4 & 5, 7 &     4 & 5, 7 &      2 & 3
                                  10, 8 & 9,     10, 8 & 9,
                                 11 & 12, 13    11 & 12, 13
                                    & 14           & 14

      42356           Open       7 & 10, 8 &    7 & 10, 8 &      2 & 3
                                 9, 11 & 12,    9, 11 & 12,
                                   14 & 15        14 & 15

     DS1235Y          Open       7 & 10, 8 &    7 & 10, 8 &      2 & 3
                                 9, 11 & 12,    9, 11 & 12,
                                   14 & 15        14 & 15

     DS1650Y          Open        4 & 5, 7 &     4 & 5, 7 &      2 & 3
                                  10, 8 & 9,     10, 8 & 9,
                                 11 & 12, 13    11 & 12, 13
                                    & 14           & 14

     628128           Open       7 & 10, 8 &    7 & 10, 8 &      2 & 3
                                 9, 11 & 12,    9, 11 & 12,
                                   14 & 15        14 & 15

     628512           Open        4 & 5, 7 &     4 & 5, 7 &      2 & 3
                                  10, 8 & 9,     10, 8 & 9,
                                 11 & 12, 13    11 & 12, 13
                                    & 14           & 14

  Note: Pins designated should be in the closed position. W14 controls S0
  & W15 controls S1.

