
AST RESEARCH, INC.

ADVANTAGE! PRO 4/25S

Processor     80486SX/ODP486/80487SX/ODPR486/80486DX/80486DX2/P24T
Processor     25/33/50(internal)/66(internal)MHz
Speed
Chip Set      Unidentified
Video Chip SetCirrus Logic
Maximum       64MB
Onboard Memory
Maximum Video 1MB
Memory
Cache         64/256KB
BIOS          Unidentified
Dimensions    355mm x 304mm
I/O Options   Floppy drive interface, IDE interface, parallel port, PS/2
              mouse port, serial ports (2), 8514 video pass through
              connector, VGA port
NPU Options   None

[Image]

                                CONNECTIONS

  Purpose               Location     Purpose                   Location

  PS/2 mouse port          CN1       8514 video pass             J19
                                     through connector

  Serial port              CN2       IDE interface               J22

  Serial port              CN3       Floppy drive                J24
                                     interface

  Parallel port            CN4       Chassis fan power           J28

  VGA port                 CN5       Front panel LEDs            J29

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

     Monitor type select color                E4             Closed

      Monitor type select monochrome           E4              Open

     On board video enabled                   E5             Closed

      On board video disabled                  E5              Open

     Password normal operation                E6             Closed

      Password clear                           E6              Open

     Parallel port IRQ select IRQ7           E12           Pins 1 & 2
                                                              closed

      Parallel port IRQ select IRQ5           E12           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

     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

     9MB       (1) 1M x 36    (1) 1M x 36     (1) 256K x        None
                                                  36

     10MB      (1) 1M x 36    (1) 1M x 36     (1) 256K x    (1) 256K x 36
                                                  36

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

     13MB      (1) 1M x 36    (1) 1M x 36    (1) 1M x 36    (1) 256K 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

     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

                        DRAM CONFIGURATION (CONT)

     Size         Bank 0        Bank 1         Bank 2          Bank 3

     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

     25MB       (1) 4M x 36   (1) 1M x 36    (1) 1M x 36    (1) 256K x 36

     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

     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

     37MB       (1) 4M x 36   (1) 4M x 36    (1) 1M x 36    (1) 256K x 36

     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

     49MB       (1) 4M x 36   (1) 4M x 36    (1) 4M x 36    (1) 256K x 36

     52MB       (1) 4M x 36   (1) 4M x 36    (1) 4M x 36     (1) 1M x 36

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

            CACHE CONFIGURATION

     Size          Bank 0          TAG

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

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

       CACHE JUMPER CONFIGURATION

   Size       E1       E2        E3

   None      Open     Open      Open

   64KB      Open     Open      Open

  256KB     Closed   Closed    Closed

                  VIDEO MEMORY CONFIGURATION

        Size                Bank 0               Bank 1

        512KB            (4) 256K x 4             None

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

  Note: Bank 0 is factory installed and is not configurable.

     CPU SPEED SELECTION

  Speed       E9       E10

  25MHz     Closed    Closed

  33MHz      Open     Closed

  50iMHz    Closed    Closed

  66iMHz     Open     Closed

                            CPU TYPE SELECTION

     Type          E11         E13       E14     E15      E16       E17

    80486SX       Open        Open      1 & 2    1 & 2   1 & 2     1 & 2
    (PQFP)

    80486SX      Closed       Open      1 & 2    1 & 2   1 & 2     1 & 2
     (PGA)

    ODP486       Closed      Closed     1 & 2    1 & 2   2 & 3     1 & 2

    80487SX      Closed      Closed     1 & 2    1 & 2   2 & 3     1 & 2

    ODPR486      Closed      Closed     2 & 3    1 & 2   2 & 3     1 & 2

    80486DX      Closed      Closed     2 & 3    1 & 2   2 & 3     1 & 2

   80486DX2      Closed      Closed     2 & 3    1 & 2   2 & 3     1 & 2

     P24T        Closed      Closed     2 & 3    2 & 3   2 & 3     Open

  Note: Pins designated should be in the closed position. The location of
  the PQFP socket is unidentified.

