
UNIDENTIFIED

786 ACIO VESA (VER. 2)

Device Type      Mainboard
Processor        80386DX/CX486DLC/80486SX/80486DX/80486DX2
Processor Speed  25/33/40/50(internal)/50/66(internal)MHz
Chip Set         Unidentified
Max. Onboard DRAM32MB
Cache            64/128/256KB
BIOS             Unidentified
Dimensions       254mm x 218mm
I/O Options      32-bit VESA local bus slots (2)
NPU Options      80387DX

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  Power LED & keylock         J2       External battery            J7

  Turbo switch                J4       Speaker                    J100

  Turbo LED                   J5       32-bit VESA Local bus       S1
                                       slot

  Reset switch                J6       32-bit VESA Local bus       S2
                                       slot

                                    USER CONFIGURABLE SETTINGS

                          Function
                                                                  Jumper
                                                                                     Position

  
                     Monitor type select color
                                                                    J3
                                                                                     Closed


                     Monitor type select monochrome
                                                                    J3
                                                                                      Open

  
                     CMOS memory normal operation (Internal
                     battery)
                                                                   JMP3
                                                                                Pins 2 & 3 closed

  
                     CMOS memory normal operation (External
                     battery)
                                                                   JMP3
                                                                                Pins 1 & 2 closed


                     CMOS memory clear
                                                                   JMP3
                                                                                Pins 2 & 4 closed

  
                     NPU enabled
                                                                   JMP4
                                                                                Pins 2 & 3 closed


                     NPU disabled
                                                                   JMP4
                                                                                Pins 1 & 2 closed

  
                     Factory configured - do not alter
                                                                   JMP7
                                                                                     Closed

  
                     Factory configured - do not alter
                                                                  JMP13
                                                                                Pins 1 & 2 closed

                                         VESA BUS SELECTION

                       Function                            JMP6           JMP14          JMP15

                   466-50MHz VESA local bus enabled        Open           1 & 2          1 & 2

                   All other VESA local busses            Closed          2 & 3          2 & 3
                   enabled

  Note: Pins designated should be in the closed position.

                  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

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

                            CACHE CONFIGURATION

     Size         Bank 0       Bank 1       TAG/U26          TAG/U27

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

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

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

                        CACHE JUMPER CONFIGURATION

  Size
              JMP1A
                             JMP1B
                                            JMP1C
                                                              JMP8

  64KB
              1 & 2
                             1 & 2
                                            1 & 2
                                                          1 & 2, 4 & 5

  128KB
              2 & 3
                             1 & 2
                                            2 & 3
                                                          2 & 3, 4 & 5

  256KB
              2 & 3
                             2 & 3
                                            2 & 3
                                                          2 & 3, 5 & 6

  Note:Pins designated should be in the closed position.

                  CPU TYPE CONFIGURATION

       Type                JMP2                JMP5

      80386DX             2 & 3               Closed

     CX486DLC              Open                Open

      80486SX             1 & 2                Open

      80486DX             2 & 3                Open

     80486DX2             2 & 3                Open

  Note:Pins designated should be in the closed position.

                 CPU SPEED CONFIGURATION

       Speed
                                    JMP9

   80386DX/25MHz
                        Pins 1 & 5 and 2 & 6 closed

   80386DX/33MHz
                        Pins 1 & 5 and 4 & 8 closed

   80386DX/40MHz
                     Pins 1 & 5, 3 & 7 and 4 & 8 closed

    CX486DLC-33
                        Pins 1 & 5 and 4 & 8 closed

    CX486DLC-40
                     Pins 1 & 5, 3 & 7 and 4 & 8 closed

     80486SX-33
                             Pins 4 & 8 closed

   80486DX/50MHz
                             Pins 3 & 7 closed

   80486DX/25MHz
                             Pins 2 & 6 closed

   80486DX/33MHz
                             Pins 4 & 8 closed

    80486DX2/50i
        MHz
                             Pins 2 & 6 closed

    80486DX2/66i
        MHz
                             Pins 4 & 8 closed


