GCH SYSTEMS, INC.

33MHz 80486 Baby AT (Rev. B)

Processor         80486DX
Processor Speed   33MHz
Chip Set          ETEQ
Max. Onboard DRAM 32MB
Cache             64/256KB
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  External battery            JP1       Reset switch              JP24

  Power LED & keylock         JP22      Turbo LED                 JP25

  Speaker                     JP23

                        USER CONFIGURABLE SETTINGS

                Function                    Jumper          Position

  »   Monitor type select color               JP2            Closed

      Monitor type select monochrome          JP2             Open

  »   Factory configured - do not alter       JP3       pins 1 & 2, 3 & 4
                                                             closed

  »   Factory configured - do not alter       JP4       pins 1 & 2, 3 & 4
                                                             closed

  »   Factory configured - do not alter       JP5       pins 2 & 3 closed

  »   Factory configured - do not alter       JP6            Closed

  »   Factory configured - do not alter       JP7       pins 1 & 2 closed

  »   Factory configured - do not alter      JP10       pins 1 & 2 closed

  »   Factory configured - do not alter      JP11            Closed

  »   Factory configured - do not alter      JP12            Closed

  »   Factory configured - do not alter      JP13            Closed

  »   Factory configured - do not alter      JP16            Closed

  »   Factory configured - do not alter      JP18            Closed

  »   Factory configured - do not alter      JP19       pins 1 & 2 closed

  »   CPU speed select iOSC/2                JP21            Closed

      CPU speed select iOSC/1                JP21             Open

  »   NPU disabled                           JP20             Open

      NPU enabled                            JP20            Closed

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

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

      16MB        (4) 4M x 9         NONE

      17MB        (4) 4M x 9     (4) 256K x 9

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

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

            CACHE CONFIGURATION

     Size          Bank 0          TAG

     64KB        (8) 8K x 8    (2) 16K x 4

     256KB       (8) 32K x 8   (2) 16K x 4

                   CACHE JUMPER CONFIGURATION

   Size        JP8        JP9       JP14       JP15       JP17

   64KB       2 & 3      2 & 3      Open       Open       Open

   256KB      1 & 2      1 & 2     Closed     Closed     Closed

  Note: Pins designated should be in the closed position.