TMC RESEARCH CORPORATION

PAT48PL

Processor          80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed    16/20/25/33/50(internal)/66(internal)MHz
Chip Set           OPTI
Max. Onboard DRAM  32MB
Cache              None
BIOS               AMI
Dimensions         254mm x 218mm
I/O Options        None
NPU Options        None

[Image]

                                CONNECTIONS

  Purpose               Location      Purpose                Location

  External battery         J1         Turbo LED           J6 pins 8 & 18

  IDE LED out              J5         Reset switch        J6 pins 9 & 19

  Speaker             J6 pins 1 - 4   IDE LED in          J6 pins 10 & 20

  Turbo switch         J6 pins 7 &    Power LED &         J6 pins 11 - 15
                           17         keylock

  Note:Board may be supplied with a surface mounted 80486SX.

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   CMOS memory normal operation             JP1           pins 2 & 3
      (internal battery)                                      closed

      CMOS memory normal operation             JP1             Open
      (external battery at J1)

      CMOS memory clear                        JP1           pins 1 & 2
                                                              closed

  »   Monitor type select color                JP2            Closed

      Monitor type select monochrome           JP2             Open

              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

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

                          CPU TYPE CONFIGURATION

      Type              RNA                RNB                 RNC

    80486SX        Not installed        Installed         Not installed

    80487SX          Installed        Not installed       Not installed

    ODP486SX         Installed        Not installed       Not installed

    80486DX        Not installed      Not installed         Installed

    80486DX2       Not installed      Not installed         Installed

  Note:Although there are two locations for CPUs, only one may be used at
  a time.