
CSS LABORATORIES, INC.

MINIMAX/LITTLE MAX 486

Processor        80486SX/80486DX/80486DX2/Pentium Overdrive
Processor Speed  25/33/50(internal)/50/66(internal)MHz
Chip Set         SIS
Max. Onboard     16MB
DRAM
Cache            64/128/256KB
BIOS             AMI
Dimensions       330mm x 218mm
I/O Options      Floppy drive interface, IDE interface, parallel port,
                 serial ports (2)
NPU Options      None

[Image]

                                CONNECTIONS

  Purpose                   Location     Purpose               Location

  Power LED & keylock          J4        Floppy drive            PJ1
                                         interface

  Reset switch/Turbo LED       J5        Parallel port           PJ2

  Turbo switch (not            J6        Serial port 1           PJ3
  available on MiniMax)

  Speaker                      J9        Serial port 2           PJ4

  Equipment panel             J39        IDE interface           PJ5
  connector

  IDE interface LED           J40        Riser Card              SL1

  IDE interface LED (on       LED
  board IDE)

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     CPU speed select iOSC/1                  J1           pins 1 & 2
      (50/66MHz)                                              closed

      CPU speed select iOSC/2                  J1           pins 2 & 3
      (25/33MHz)                                              closed

     Ocsillator type select OSC1              J2           pins 1 & 2
      (25/50MHz)                                              closed

      Ocsillator type select OSC3              J2           pins 2 & 3
      (33/66MHz)                                              closed

     Monitor type select color                J3           pins 1 & 2
                                                              closed

      Monitor type select monochrome           J3           pins 2 & 3
                                                              closed

     Factory configured - do not             J11              Open
      alter

     Floppy drive interface enabled           S4           pins 2 & 3
                                                              closed

      Floppy drive interface disabled          S4           pins 1 & 2
                                                              closed

     IDE interface enabled                    S5           pins 2 & 3
                                                              closed

      IDE interface disabled                   S5           pins 1 & 2
                                                              closed

                      SERIAL PORT CONFIGURATION (PJ3)

     Port 1         IRQ            S0             S1             PJ6

    Disabled        N/A        pins 1 & 2     pins 1 & 2         N/A
                                 closed         closed

      COM1          IRQ4       pins 2 & 3     pins 2 & 3      pins 1 & 2
                                 closed         closed         closed

      COM2          IRQ3       pins 1 & 2     pins 2 & 3      pins 1 & 3
                                 closed         closed         closed

                      SERIAL PORT CONFIGURATION (PJ4)

     Port 2         IRQ            S2             S3             PJ6

    Disabled        N/A        pins 1 & 2     pins 1 & 2         N/A
                                 closed         closed

      COM1          IRQ4       pins 1 & 2     pins 2 & 3      pins 2 & 4
                                 closed         closed         closed

      COM2          IRQ3       pins 2 & 3     pins 2 & 3      pins 3 & 4
                                 closed         closed         closed

                        PARALLEL PORT CONFIGURATION

      LPT           IRQ            P0             P1             PRT

    Disabled        N/A        pins 1 & 2     pins 1 & 2         N/A
                                 closed         closed

     LPT 1          IRQ7       pins 2 & 3     pins 1 & 2      pins 2 & 3
                                 closed         closed         closed

     LPT 2          IRQ5       pins 2 & 3     pins 2 & 3      pins 1 & 2
                                 closed         closed         closed

     LPT 3          IRQ7       pins 1 & 2     pins 2 & 3      pins 2 & 3
                                 closed         closed         closed

                DRAM CONFIGURATION

      Size            Bank 0           Bank 1

       1MB        (1) 256K x 36         NONE

       2MB        (1) 256K x 36    (1) 256K x 36

       2MB        (1) 512K x 36         NONE

       4MB         (1) 1M x 36          NONE

       5MB        (1) 256K x 36     (1) 1M x 36

       6MB        (1) 512K x 36     (1) 1M x 36

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

       8MB         (1) 2M x 36          NONE

      10MB        (1) 512K x 36     (1) 2M x 36

      16MB         (1) 2M x 36      (1) 2M x 36

                         DRAM JUMPER CONFIGURATION

         Size                     J8                        J10

          1MB                    Open                      Open

          2MB              pins 1 & 2 closed         pins 2 & 3 closed

          2MB              pins 2 & 3 closed               Open

          4MB                    Open                      Open

          5MB              pins 1 & 2 closed         pins 2 & 3 closed

          6MB              pins 2 & 3 closed         pins 1 & 2 closed

          8MB              pins 1 & 2 closed         pins 2 & 3 closed

          8MB              pins 2 & 3 closed               Open

         10MB              pins 2 & 3 closed         pins 1 & 2 closed

         16MB              pins 2 & 3 closed         pins 1 & 2 closed

            Note: This board accepts 4M x 36 SIMMS, but jumper settings
            are not identified by the manufacturer.

                    CACHE CONFIGURATION

     Size          Bank 0         Bank 1          TAG

     64KB        (4) 8K x 8     (4) 8K x 8    (1) 8K x 8

     128KB      (4) 32K x 8        NONE       (1) 32K x 8

     256KB      (4) 32K x 8    (4) 32K x 8    (1) 32K x 8

                        CACHE JUMPER CONFIGURATION

    Size          W6             W7              W8              W9

    64KB         Open           Open         pins 2 & 3      pins 2 & 3
                                               closed          closed

   128KB         Open          Closed        pins 1 & 2      pins 1 & 2
                                               closed          closed

   256KB        Closed         Closed        pins 2 & 3      pins 2 & 3
                                               closed          closed

                          CPU TYPE CONFIGURATION

       Type                W2                W4                 W5

      80486SX          pins 1 & 2         pins 1 & 2          Closed
                         closed            closed

      80486DX          pins 2 & 3         pins 2 & 3           Open
                         closed            closed

                    CPU TYPE CONFIGURATION (OVERDRIVE)

           Type                       W1                      W3

    Overdrive installed       pins 1 & 2 closed             Closed

  Overdrive not installed     pins 2 & 3 closed              Open

   EQUIPMENT PANEL CONNECTOR PIN OUT

    Description             J39

       Ground              pin 1

       Power               pin 1

   Hard drive LED          pin 3

      Not used             pin 4

       Power               pin 5

       Ground              pin 6

     Turbo LED             pin 7

  Keyboard inhibit         pin 8

       Power               pin 9

    Reset button          pin 10

