
FORTRESS SYSTEMS INTERNATIONAL

GENESIS II 486 VESA/ISA

Processor  CX486SX/AM486SX/80486SX/CX486DX/AM486DX/80486DX/
           CX486DX2/AM486DX2/80486DX2/CX486DX4/AM486DX4/80486DX4
Processor  25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/
Speed      100(internal)/120(internal)MHz
Chip Set   Unidentified
Video Chip None
Set
Maximum    64MB
Onboard
Memory
Maximum    None
Video
Memory
Cache      128/256/512/1024KB
BIOS       AMI/Award/MR BIOS
Dimensions 254mm x 218mm
I/O        32-bit VESA local bus slots (3), green PC connector
Options
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose                 Location    Purpose                   Location

  Power LED & keylock       JP16      Green PC connector          JP20

  Speaker                   JP17      Turbo LED                   JP21

  Green PC LED              JP18      Reset switch                JP26

  Turbo switch              JP19      32-bit VESA local bus    SL1  SL3
                                      slots

                        USER CONFIGURABLE SETTINGS

                Function                    Label           Position

     CMOS memory normal operation           JP1        Pins 1 & 2 closed

      CMOS memory clear                      JP1        Pins 2 & 3 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

     2MB        (1) 512K x        None           None           None
                    36

     3MB        (1) 256K x     (1) 512K 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) 512K x     (1) 512K x        None           None
                    36             36

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

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

     5MB        (1) 256K x     (1) 256K x     (1) 256K x    (1) 512K x 36
                    36             36             36

     6MB        (1) 512K x    (1) 1M x 36        None           None
                    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

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

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

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

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

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

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

  Note: Board accepts x 32 SIMMs.

        DRAM JUMPER CONFIGURATION

       Setting               JP70

   1 BK installed     Pins 1 & 2 closed

   2 BK installed     Pins 2 & 3 closed

              CACHE CONFIGURATION

      Size          Bank 0          Bank 1

     128KB        (4) 32K x 8        None

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

   256KB (B)      (4) 64K x 8        None

   512KB (A)      (4) 128K x 8       None

   512KB (B)      (4) 64K x 8    (4) 64K x 8

      1MB         (4) 128K x 8   (4) 128K x 8

                        CACHE JUMPER CONFIGURATION

      Size               JP6               JP11               JP12

      128KB             Open            Pins 2 & 3      Pins 1 & 2 closed
                                          closed

    256KB (A)           Open            Pins 1 & 2      Pins 1 & 2 closed
                                          closed

    256KB (B)           Open            Pins 2 & 3      Pins 1 & 2 closed
                                          closed

    512KB (A)           Open            Pins 2 & 3      Pins 2 & 3 closed
                                          closed

    512KB (B)         Pins 1 & 2           Open         Pins 2 & 3 closed
                       closed

       1MB            Pins 2 & 3           Open         Pins 2 & 3 closed
                       closed

                            CPU SPEED SELECTION

     Speed          JP2A           JP2B           JP2C           JP22

     25MHz         Closed       Pins 1 & 2     Pins 2 & 3        Open
                                  closed         closed

     33MHz         Closed       Pins 2 & 3     Pins 1 & 2        Open
                                  closed         closed

     40MHz          Open        Pins 1 & 2     Pins 2 & 3       Closed
                                  closed         closed

    50iMHz         Closed       Pins 1 & 2     Pins 2 & 3        Open
                                  closed         closed

     50MHz          Open        Pins 2 & 3     Pins 1 & 2       Closed
                                  closed         closed

    66iMHz         Closed       Pins 2 & 3     Pins 1 & 2        Open
                                  closed         closed

    75iMHz         Closed       Pins 1 & 2     Pins 2 & 3        Open
                                  closed         closed

    80iMHz          Open        Pins 1 & 2     Pins 2 & 3       Closed
                                  closed         closed

    100iMHz        Closed       Pins 2 & 3     Pins 1 & 2        Open
                                  closed         closed

    120iMHz         Open        Pins 1 & 2     Pins 2 & 3       Closed
                                  closed         closed

            CPU TYPE SELECTION

        Type                 JP15

        Cyrix         Pins 2 & 3 closed

         AMD          Pins 1 & 2 closed

        Intel         Pins 1 & 2 closed

  VL BUS SPEED SELECTION

    Speed         JP13

  <= 33MHz       Closed

   >33 MHz        Open

                       FLASH BIOS VOLTAGE SELECTION

         Voltage                   JP5                      JP80

           5v               Pins 1 & 2 closed         Pins 1 & 3, 2 & 4
                                                           closed

           12v              Pins 2 & 3 closed         Pins 3 & 5, 4 & 6
                                                           closed

