
UNITRON COMPUTER, INC.

3486 SYSTEM TYPE 32

Processor   80386DX/CX486DLC/80486SX80487SX/ODP486SX/80486DX/80486DX2
Processor   20/25/33/40/50(internal)/50/66(internal)/80(internal)MHz
Speed
Chip Set    OPTI
Max.        32MB
Onboard
DRAM
Cache       32/64/128/256KB
BIOS        AMI
Dimensions  330mm x 218mm
I/O Options Floppy drive interface, game port, IDE interface, parallel
            port, serial ports (2), VGA port
NPU Options 80387DX

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  Game port                  CN1       Turbo LED                  J19

  VGA port                   CN2       Turbo switch               J21

  Parallel port              CN3       IDE interface LED          J22

  Serial port 2              CN4       External video ports     J23 & J46

  Serial port 1              CN5       Floppy drive               J26
                                       interface

  IDE interface              J16       Reset switch               J58

  Power LED & keylock        J17       Riser Card                 SL1

  Speaker                    J18

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Serial port 2 enabled                    J3            pins 1 & 2
                                                              closed

      Serial port 2 disabled                   J3            pins 2 & 3
                                                              closed

     IDE interface enabled                    J4            pins 1 & 2
                                                              closed

      IDE interface disabled                   J4            pins 2 & 3
                                                              closed

     Floppy drive interface enabled           J5            pins 1 & 2
                                                              closed

      Floppy drive interface disabled          J5            pins 2 & 3
                                                              closed

     Parallel port select LPT1                J6            pins 1 & 2
                                                              closed

      Parallel port select LPT2                J6            pins 2 & 3
                                                              closed

     Serial port 1 enabled                    J8            pins 1 & 2
                                                              closed

      Serial port 1 disabled                   J8            pins 2 & 3
                                                              closed

     Game port enabled                        J9            pins 1 & 2
                                                              closed

      Game port disabled                       J9            pins 2 & 3
                                                              closed

     Hard disk drive installed                J10           pins 1 & 2
                                                              closed

      Hard disk drive not enabled              J10           pins 2 & 3
                                                              closed

     Parallel port enabled                    J11           pins 1 & 2
                                                              closed

      Parallel port disabled                   J11           pins 2 & 3
                                                              closed

     NPU disabled                             J20           pins 2 & 3
                                                              closed

      NPU enabled                              J20           pins 1 & 2
                                                              closed

     Floppy drive A/B LED select on           J29           pins 1 & 2
      J22 Floppy drive A                                      closed

      Floppy drive A/B LED select on           J29           pins 2 & 3
      J22 Floppy drive B                                      closed

     Floppy/turbo LED select on J19           J30           pins 1 & 2
      Floppy (System B or KPUA)                               closed

      Floppy/turbo LED select on J19           J30           pins 2 & 3
      Turbo (System M or MSO)                                 closed

     Factory configured - do not alter        J31             Open

     Factory configured - do not alter        J32             Open

     Factory configured - do not alter        J33             Open

     Factory configured - do not alter        J34             Open

     Factory configured - do not alter        J43             Open

     Parity check disabled                    J44           pins 1 & 2
                                                              closed

      Parity check enabled                     J44           pins 2 & 3
                                                              closed

     Monitor type select monochrome           J51           pins 1 & 2
                                                              closed

      Monitor type select color                J51           pins 2 & 3
                                                              closed

     Factory configured - do not alter        J52             Open

     Factory configured - do not alter        J53             Open

                    USER CONFIGURABLE SETTINGS (CONT)

                Function                     Jumper          Position

     Factory configured - do not             J54              Open
      alter

     Factory configured - do not             J55              Open
      alter

     Factory configured - do not             J56              Open
      alter

     Factory configured - do not             J57              Open
      alter

  Note: Hard drive & floppy drive jumper settings must match.

              DRAM CONFIGURATION

      Size          Bank 0          Bank 1

      1MB         (4) 256K x 9       NONE

      2MB         (4) 256K x 9   (4) 256K x 9

      4MB         (4) 1M x 9         NONE

      5MB         (4) 256K x 9    (4) 1M x 9

      8MB         (4) 1M x 9      (4) 1M x 9

      16MB        (4) 4M x 9         NONE

      20MB        (4) 1M x 9      (4) 4M x 9

      32MB        (4) 4M x 9      (4) 4M x 9

                    CACHE CONFIGURATION

     Size          Bank 0         Bank 1          TAG

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

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

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

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

                        CACHE JUMPER CONFIGURATION

  Size      J35     J36     J37     J38     J39     J40     J41     J42

  32KB     1 & 2   1 & 2   1 & 2   1 & 2   1 & 2   1 & 2   2 & 3    Open

  64KB     2 & 3   1 & 2   1 & 2   2 & 3   1 & 2   1 & 2   1 & 2    Open

  128KB    2 & 3   2 & 3   1 & 2   2 & 3   2 & 3   1 & 2   2 & 3   1 & 2

  256KB    2 & 3   2 & 3   2 & 3   2 & 3   2 & 3   2 & 3   1 & 2   2 & 3

  Note: Pins designated should be in the closed position.

                    CPU TYPE CONFIGURATION

        Type                 J24                  J59

        80386          pins 1 & 2 closed          Open

      80486DLC         pins 1 & 2 closed          Open

        80486          pins 2 & 3 closed         Closed

                           CPU TYPECONFIGURATION

                 Type                                  J15

           80486SX PQFP only                          Open

        80486SX PQFP & 80487SX                  pins 1 & 2 closed

  80486SX PQFP & 80486DX/DX2/ODP486SX           pins 2 & 3 closed

                      VESA CPU TYPE CONFIGURATION

          Type                    J1                      J14

        80486SX            pins 2 & 3 closed             Open

        80487SX          pins 1, 2 & 3 closed      pins 2 & 3 closed

        ODP486SX         pins 1, 2 & 3 closed      pins 2 & 3 closed

      80486DX/DX2        pins 1, 2 & 3 closed      pins 1 & 2 closed

                CPU SPEED CONFIGURATION (ICS2494-244 CLOCK)

    Speed          J47            J48            J49             J50

    20MHz       pins 1 & 2     pins 1 & 2     pins 1 & 2      pins 1 & 2
                 closed          closed         closed         closed

    25MHz       pins 2 & 3     pins 2 & 3     pins 1 & 2      pins 1 & 2
                 closed          closed         closed         closed

    32MHz       pins 1 & 2     pins 1 & 2     pins 1 & 2      pins 2 & 3
                 closed          closed         closed         closed

    33MHz       pins 2 & 3     pins 2 & 3     pins 2 & 3      pins 1 & 2
                 closed          closed         closed         closed

    40MHz       pins 1 & 2     pins 1 & 2     pins 2 & 3      pins 2 & 3
                 closed          closed         closed         closed

    50MHz       pins 2 & 3     pins 1 & 2     pins 1 & 2      pins 1 & 2
                 closed          closed         closed         closed

    66MHz       pins 2 & 3     pins 1 & 2     pins 2 & 3      pins 1 & 2
                 closed          closed         closed         closed

    80MHz       pins 2 & 3     pins 1 & 2     pins 1 & 2      pins 2 & 3
                 closed          closed         closed         closed

                  CPU SPEED CONFIGURATION (IMS425 CLOCK)

    Speed          J47            J48            J49             J50

    20MHz       pins 1 & 2     pins 2 & 3     pins 1 & 2      pins 2 & 3
                 closed          closed         closed         closed

    25MHz       pins 1 & 2     pins 2 & 3     pins 2 & 3      pins 2 & 3
                 closed          closed         closed         closed

    32MHz       pins 1 & 2     pins 1 & 2     pins 2 & 3      pins 1 & 2
                 closed          closed         closed         closed

    33MHz       pins 2 & 3     pins 2 & 3     pins 1 & 2      pins 2 & 3
                 closed          closed         closed         closed

    40MHz       pins 2 & 3     pins 2 & 3     pins 1 & 2      pins 1 & 2
                 closed          closed         closed         closed

    50MHz       pins 2 & 3     pins 2 & 3     pins 2 & 3      pins 1 & 2
                 closed          closed         closed         closed

    66MHz       pins 2 & 3     pins 1 & 2     pins 2 & 3      pins 1 & 2
                 closed          closed         closed         closed

    80MHz       pins 2 & 3     pins 1 & 2     pins 1 & 2      pins 1 & 2
                 closed          closed         closed         closed

       SERIAL PORT 1 CONFIGURATION

       Port 1                 J7

        COM1          pins 1 & 2 closed

        COM3          pins 2 & 3 closed

       SERIAL PORT 2 CONFIGURATION

       Port 2                 J2

        COM2          pins 1 & 2 closed

        COM4          pins 2 & 3 closed

