
ZYTEX COMPUTERS, INC.

TB486

Processor         80486DX
Processor Speed   33MHz
Chip Set          ETEQ
Max. Onboard DRAM 32MB
Cache             64/256KB
BIOS              AMI/MR
Dimensions        330.2mm x 218.4mm
I/O OPTIONS       32-bit external memory card slot
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                  Location     Purpose                 Location

  Reset switch                J4        Power LED & Keylock       JP26

  External battery            JP2       Speaker                   JP27

  32-bit external             JP5       Turbo LED                  T1
  memory card

  Turbo switch               JP25

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Monitor type select monochrome           J4              Open

      Monitor type select color                J4             Closed

     Filter circuitry disabled                JP3            Closed

      Filter circuitry enabled                 JP3             Open

     NPU read speed select 3 wait            JP24             Open
      states

      NPU read speed select 2 wait            JP24            Closed
      states

              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) 8K x 8

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

                        CACHE JUMPER CONFIGURATION

   Size         JP19          JP20         JP21       JP22        JP23

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

   256KB      pins 1 & 2   pins 1 & 2     Closed     Closed      Closed
               closed        closed

