
ADVANCED COMPUTER TECHNOLOGY, LTD.

T386-25

Processor         80386DX
Processor Speed   25MHz
Chip Set          ACT
Max. Onboard DRAM 16MB
Cache             None
BIOS              AMI
Dimensions        330mm x 218mm
I/O Options       None
NPU Options       80387/3167

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Turbo LED                   JP3      External battery           JP13

  Power LED & Keylock         JP7      Speaker                    JP16

  Reset switch               JP12      Turbo switch               JP17

                        USER CONFIGURABLE SETTINGS

              Function                  Jumper/Switch         Position

     BIOS type select 27512                 JP6             pins 1 & 2
                                                               closed

      BIOS type select 27256                 JP6             pins 2 & 3
                                                               closed

     Monitor type select color              JP8             pins 2 & 3
                                                               closed

      Monitor type select                    JP8             pins 1 & 2
      monochrome                                               closed

     Battery select internal               JP14             pins 2 & 3
                                                               closed

      Battery select external               JP14             pins 1 & 2
                                                               closed

     Power good signal detect              JP15             pins 1 & 2
      from power supply                                        closed

      Power good signal detect              JP15             pins 2 & 3
      from board                                               closed

     Refresh timing select normal          JP18             pins 1 & 2
                                                               closed

      Refresh timing select fast            JP18             pins 2 & 3
                                                               closed

     Parity check enabled                  JP19             pins 1 & 2
                                                               closed

      Parity check disabled                 JP19             pins 2 & 3
                                                               closed

     Page mode select normal 1, 2          JP20             pins 1 & 2
      wait state                                               closed

      Page mode select page                 JP20             pins 2 & 3
      interleave                                               closed

     SIMM wait state select 2              JP21             pins 2 & 3
      wait states (non-page mode)                              closed

      SIMM wait state select 1              JP21             pins 1 & 2
      wait state (non-page mode)                               closed

     DIP RAM wait state select 2           JP22             pins 2 & 3
      wait states (non-page mode)                              closed

      DIP RAM wait state select 1           JP22             pins 1 & 2
      wait state (non-page mode)                               closed

     Interleave factor banks 0-3           SW1/3               Off
      four way interleave disabled

      Interleave factor banks 0-3           SW1/3                On
      four way interleave enabled

     Interleave factor banks 2             SW1/4               Off
      and 3 interleave disabled

      Interleave factor banks 2             SW1/4                On
      and 3 two way interleave
      enabled

     Interleave factor banks 0             SW1/5               Off
      and 1 interleave disabled

      Interleave factor banks 0             SW1/5                On
      and 1 two way interleave
      enabled

  Note:SW1/switch 5 should be open if 1MB is installed, if memory is
  greater it should be closed.

  SW1/switch 4 should be closed if 10MB is installed.

  SW1/switch 3 should be closed if 4MB is installed.

  JP20 pins 1 & 2 must be closed if 4M x 9 SIMMs are used.

                            DRAM CONFIGURATION

  Size     Bank 0      Bank 1    Bank 2    Bank 3      P-0         P-1

   1MB       (8)        NONE      NONE      NONE        (4)       NONE
            44256                                     41256

   2MB       (8)         (8)      NONE      NONE        (4)     (4) 41256
            44256      44256                          41256

   3MB       (8)         (8)       (4)      NONE        (4)     (4) 41256
            44256      44256      256K x              41256
                                    9

   4MB       (8)         (8)       (4)       (4)        (4)     (4) 41256
            44256      44256      256K x    256K x    41256
                                    9         9

   6MB       (8)         (8)      (4) 1M    NONE        (4)     (4) 41256
            44256      44256       x 9                41256

  10MB       (8)         (8)      (4) 1M    (4) 1M      (4)     (4) 41256
            44256      44256       x 9       x 9      41256

  16MB      NONE        NONE      (4) 4M    (4) 4M     NONE       NONE
                                   x 9       x 9

                     DRAM JUMPER/SWITCH CONFIGURATION

     Size         SW1/6          SW1/7         SW1/8            JP23

     1MB           Off            Off           Off          pins 2 & 3
                                                               closed

     2MB           Off            Off            On          pins 2 & 3
                                                               closed

     3MB           Off            On            Off          pins 2 & 3
                                                               closed

     4MB           Off            On             On          pins 2 & 3
                                                               closed

     6MB            On            On            Off          pins 2 & 3
                                                               closed

     10MB           On            On             On          pins 2 & 3
                                                               closed

     16MB          Off            Off           Off          pins 1 & 2
                                                               closed

                      DRAM REFRESH RATE CONFIGURATION

           Size                     SW1/1                   SW1/2

  Refreshes per hold cycle           Off                     Off
         select 1

  Refreshes per hold cycle           Off                     On
         select 2

  Refreshes per hold cycle            On                     Off
         select 4

  Refreshes per hold cycle            On                     On
         select 8

                    NPU TYPE CONFIGURATION

        Type                 JP2                  JP4

        80387          pins 1 & 2 closed   pins 2 & 3 closed

        3167           pins 2 & 3 closed   pins 1 & 2 closed

