
FIRST INTERNATIONAL COMPUTER, INC.

486-GAC-V

Processor     80486SX/CX486S/SL enhanced/80486DX

              80486DX2/80486DX4/Pentium Overdrive
Processor     25/33/40/50(internal)/66(internal)/100(internal)MHz
Speed
Chip Set      VIA
Max. Onboard  64MB
DRAM
Cache         64/128/256KB
BIOS          Award
Dimensions    330mm x 218mm
I/O Options   3.3V Daughter board connector, 32-bit VESA local bus slot,

              floppy drive interface,IDE interface, parallel port, PS/2
              mouse port,

              serial ports (2), VGA feature connector, VGA port
NPU Options   None

[Image]

                                CONNECTIONS

  Purpose                 Location     Purpose                 Location

  PS/2 keyboard             CN1        Green power supply         J3
  connector                            connector

  PS/2 mouse                CN2        IDE interface LED          J6
  connector

  Serial port 1             CN3        Turbo switch              J11

  Serial port 2             CN4        Turbo LED                 J12

  Parallel port             CN5        Reset switch              J13

  VGA port                  CN6        Speaker                   J14

  Video feature             CN8        Power LED & keylock       J15
  connector (8514A)

  Floppy drive              CN9        ISA Bus slot              SL1
  interface

  IDE interface             CN10       32-bit VESA Local         SL2
                                       bus slot

  3.3V Daughter board       CN11
  connector

                        USER CONFIGURABLE SETTINGS

                Function                      Jumper         Position

     I/O Channel not set to Adaptec            J1             Open
      (transfer rate < 5.7 MB/s)

      I/O Channel set to Adaptec ISA            J1            Closed
      Master (1542B/C SCSI)

     IDE not connected to BALE signal          J4             Open

      IDE connected to BALE signal              J4            Closed

     IDE not connected to IOCHRDY              J5             Open
      signal

      IDE connected to IOCHRDY signal           J5            Closed

     Password enabled                          J7             Open

      Password clear                            J7            Closed

     Factory configured do not alter           J9           pins 1 & 2
                                                              closed

      Pentium Overdrive write-back             JC7            Closed

      Pentium Overdrive write-through          JC7             Open

     Local IDE enabled                        JD3           pins 2 & 3
                                                              closed

      Local IDE disabled                       JD3           pins 1 & 2
                                                              closed

     NS87312 I/O port address - index         JN6           pins 1 & 2
      port 26eh, data port 26Fh                               closed

      NS87312 I/O port address - index         JN6           pins 2 & 3
      port 398h, data port 399h                               closed

     IRQ9 disabled                            JV1             Open

      IRQ9 enabled                             JV1            Closed

     Onboard VGA enabled                      JV2           pins 2 & 3
                                                              closed

      Onboard VGA disabled                     JV2           pins 1 & 2
                                                              closed

                            DRAM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2         Bank 3

     1MB        (1) 256K x        NONE           NONE           NONE
                    36

     2MB        (1) 256K x     (1) 256K x        NONE           NONE
                    36             36

     3MB        (1) 256K x     (1) 256K x     (1) 256K x        NONE
                    36             36             36

     4MB        (1) 256K x     (1) 256K x     (1) 256K x    (1) 256K x 36
                    36             36             36

     4MB       (1) 1M x 36        NONE           NONE           NONE

     5MB       (1) 1M x 36     (1) 256K x        NONE           NONE
                                   36

     6MB       (1) 1M x 36     (1) 256K x     (1) 256K x        NONE
                                   36             36

     7MB       (1) 1M x 36     (1) 256K x     (1) 256K x    (1) 256K x 36
                                   36             36

     8MB       (1) 1M x 36    (1) 1M x 36        NONE           NONE

     12MB      (1) 1M x 36    (1) 1M x 36    (1) 1M x 36        NONE

     12MB          NONE       (1) 1M x 36    (1) 2M x 36        NONE

     12MB          NONE           NONE       (1) 1M x 36     (1) 2M x 36

     16MB      (1) 1M x 36    (1) 1M x 36    (1) 1M x 36     (1) 1M x 36

     16MB      (1) 4M x 36        NONE           NONE           NONE

     16MB          NONE       (1) 1M x 36    (1) 2M x 36     (1) 1M x 36

     16MB          NONE           NONE       (1) 2M x 36     (1) 2M x 36

     17MB      (1) 4M x 36     (1) 256K x        NONE           NONE
                                   36

     18MB      (1) 4M x 36     (1) 256K x     (1) 256K x        NONE
                                   36             36

     19MB      (1) 4M x 36     (1) 256K x     (1) 256K x    (1) 256K x 36
                                   36             36

     20MB      (1) 4M x 36    (1) 1M x 36        NONE           NONE

     21MB      (1) 4M x 36    (1) 1M x 36     (1) 256K x        NONE
                                                  36

     22MB      (1) 4M x 36    (1) 1M x 36     (1) 256K x    (1) 256K x 36
                                                  36

     24MB      (1) 4M x 36    (1) 1M x 36    (1) 1M x 36        NONE

     28MB      (1) 4M x 36    (1) 1M x 36    (1) 1M x 36     (1) 1M x 36

     32MB      (1) 4M x 36    (1) 4M x 36        NONE           NONE

     32MB          NONE           NONE       (1) 8M x 36        NONE

     32MB          NONE           NONE           NONE        (1) 8M x 36

     33MB      (1) 4M x 36    (1) 4M x 36     (1) 256K x        NONE
                                                  36

     34MB      (1) 4M x 36    (1) 4M x 36     (1) 256K x    (1) 256K x 36
                                                  36

     36MB      (1) 4M x 36    (1) 4M x 36    (1) 1M x 36        NONE

     40MB      (1) 4M x 36    (1) 4M x 36    (1) 1M x 36     (1) 1M x 36

     48MB      (1) 4M x 36    (1) 4M x 36    (1) 4M x 36        NONE

     48MB          NONE       (1) 4M x 36    (1) 8M x 36        NONE

     48MB          NONE           NONE       (1) 4M x 36     (1) 8M x 36

     64MB      (1) 4M x 36    (1) 4M x 36    (1) 4M x 36     (1) 4M x 36

                    CACHE CONFIGURATION

     Size          Bank 0         Bank 1       TAG (M9)

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

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

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

                        CACHE JUMPER CONFIGURATION

      Size               JS1               JS2                 JS3

      64KB            pins 1 & 2        pins 1 & 2      pins 1 & 2 closed
                       closed             closed

      128KB           pins 2 & 3        pins 1 & 2      pins 1 & 2 closed
                       closed             closed

      256KB           pins 2 & 3        pins 2 & 3      pins 2 & 3 closed
                       closed             closed

                  VESA WAIT STATE/BUS SPEED CONFIGURATION

    CPU speed        Wait states            JL1                JL2

     < 33MHz        0 wait states        pins 1 & 2         pins 1 & 2
                                          closed             closed

     > 33MHz         1 wait state        pins 2 & 3         pins 2 & 3
                                          closed             closed

                          CPU TYPE CONFIGURATION

      Type             JC1           JC2           JC3           JC4

     80486SX        pins 2 & 3    pins 2 & 3       Open       pins 1 & 2
                     closed         closed                      closed

     Cx486S         pins 2 & 3    pins 2 & 3       Open       pins 1 & 2
                     closed         closed                      closed

     Cx487S         pins 1 & 2    pins 1 & 2       Open       pins 1 & 2
                     closed         closed                      closed

     Cx486DX        pins 1 & 2    pins 1 & 2       Open       pins 1 & 2
                     closed         closed                      closed

    AM486DXL        pins 1 & 2    pins 1 & 2       Open       pins 1 & 2
                     closed         closed                      closed

     80486DX        pins 1 & 2    pins 1 & 2       Open       pins 1 & 2
                     closed         closed                      closed

    80486DX2        pins 1 & 2    pins 1 & 2       Open       pins 1 & 2
                     closed         closed                      closed

    80486DX4        pins 1 & 2    pins 1 & 2       Open       pins 1 & 2
                     closed         closed                      closed

     Pentium        pins 1 & 2    pins 1 & 2      Closed      pins 2 & 3
    Overdrive        closed         closed                      closed

                    CPU TYPE CONFIGURATION (CONTINUED)

     Type         JC5           RC1             RC2              RC3

   80486SX        Open      Not Installed   Not Installed   Not Installed

    Cx486S        Open      Not Installed    Installed      Not Installed

   Cx486DX        Open      Not Installed    Installed      Not Installed

   AM486DXL       Open      Not Installed   Not Installed     Installed

   80486DX        Open      Not Installed   Not Installed   Not Installed

   80486DX2       Open      Not Installed   Not Installed   Not Installed

   80486DX4      Closed      Installed      Not Installed   Not Installed

                    CPU TYPE CONFIGURATION (CONTINUED)

      Type          J2          J10        JX3         JX4         JX5

  Regular CPU     pins 1 &    pins 1 &     N/A         Open      pins 1 &
                     2           2                                  2

  SL-enhanced     pins 2 &    pins 2 &   pins 1 &    pins 1 &    pins 2 &
                     3           3          2           2           3

   Cyrix CPU        N/A         N/A      pins 2 &    pins 2 &      N/A
                                            3           3

  Note:JX3 may not be available on some mainboards.

  Pins designated are in the closed position.

                     CPU SPEED (VT8225N) CONFIGURATION

    Clock           JK1            JK2            JK3            JK4

    25 MHz       pins 2 & 3     pins 1 & 2     pins 2 & 3     pins 1 & 2
                  closed         closed         closed          closed

    33 MHz       pins 2 & 3     pins 2 & 3     pins 1 & 2     pins 1 & 2
                  closed         closed         closed          closed

    40 MHz       pins 1 & 2     pins 1 & 2     pins 2 & 3     pins 1 & 2
                  closed         closed         closed          closed

    50iMHz       pins 2 & 3     pins 1 & 2     pins 2 & 3     pins 1 & 2
                  closed         closed         closed          closed

    50 MHz       pins 2 & 3     pins 1 & 2     pins 2 & 3     pins 2 & 3
                  closed         closed         closed          closed

    66iMHz       pins 2 & 3     pins 2 & 3     pins 1 & 2     pins 1 & 2
                  closed         closed         closed          closed

                     DX4 INTERNAL CLOCK CONFIGURATION

                 Speed                                  JC6

               Internal 3 X                           Open

               Internal 2.5 X                    pins 1 & 2 closed

                Internal 2 X                     pins 2 & 3 closed

              IDE SPEED SELECT CONFIGURATION (PDC 20230 ONLY)

         IDE Type                    JD1                     JD2

            Normal           pins 2 & 3 closed       pins 2 & 3 closed

              Fast            pins 1 & 2 closed       pins 1 & 2 closed

             Medium           pins 2 & 3 closed       pins 1 & 2 closed

                   PRINTER PORT DIRECTION CONFIGURATION

            Direction                    JN7                  JN8

            Output only          pins 1 & 2 closed    pins 2 & 3 closed

             Input only           pins 1 & 2 closed    pins 1 & 2 closed

           Bi-directional         pins 2 & 3 closed          Closed

              VRAM CONFIGURATION

      Size          Bank 0          Bank 1

      1MB         (2) 512K x 4       NONE

      2MB         (2) 512K x 4   (2) 512K x 4

