
AST RESEARCH, INC.

ADVANTAGE! PRO 486

(202643-110, 202688-103)

Processor  80486SX/SL80486DX/SL80486DX2/80486DX4/Pentium Overdrive
Processor  25/33/50(internal)/66(internal)/75(internal)/100(internal)MHz
Speed
Chip Set   Unidentified
Max.       64MB
Onboard
DRAM
Cache      64/256KB
BIOS       Unidentified
Dimensions 355mm x 305mm
I/O        32-bit VESA local bus slot, floppy drive interface, IDE
Options    interface, parallel port, PS/2 mouse port, serial ports (2),
           8514 video pass through connector, VGA port
NPU        None
Options

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  VGA port                   CN1       IDE interface              J22

  Parallel port              CN2       Floppy drive               J24
                                       interface

  Serial port                CN3       Speaker                    J27

  Serial port                CN4       Chassis fan power          J28

  PS/2 mouse port            CN5       Front panel connector      J29

  VGA feature connector      J19       32-bit VESA local bus      SL1
                                       slot

  Note: The location of J27 is unidentified.

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Parallel port IRQ select IRQ7            E2           pins 1 & 2
                                                              closed

      Parallel port IRQ select IRQ5            E2           pins 2 & 3
                                                              closed

     On board video enabled                   E7             Closed

      On board video disabled                  E7              Open

     Monitor type select color                E8             Closed

      Monitor type select monochrome           E8              Open

     Factory configured - do not              E9             Closed
      alter

     Password enabled                        E10             Closed

      Password disabled                       E10              Open

     Factory configured - do not             E11              Open
      alter

     Factory configured - do not             E16              Open
      alter

  Note: The locations of E11 & E16 are unidentified.

                            DRAM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2         Bank 3

     1MB        (1) 256K x        NONE           NONE           NONE
                    32

     2MB        (1) 256K x     (1) 256K x        NONE           NONE
                    32             32

     3MB        (1) 256K x     (1) 256K x     (1) 256K x        NONE
                    32             32             32

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

     4MB        (1) 256K x     (1) 256K x     (1) 256K x    (1) 256K x 32
                    32             32             32

     5MB       (1) 1M x 32     (1) 256K x        NONE           NONE
                                   32

     6MB       (1) 1M x 32     (1) 256K x     (1) 256K x        NONE
                                   32             32

     7MB       (1) 1M x 32     (1) 256K x     (1) 256K x    (1) 256K x 32
                                   32             32

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

     9MB       (1) 1M x 32    (1) 1M x 32     (1) 256K x        NONE
                                                  32

     10MB      (1) 1M x 32    (1) 1M x 32     (1) 256K x    (1) 256K x 32
                                                  32

     12MB      (1) 1M x 32    (1) 1M x 32    (1) 1M x 32        NONE

     13MB      (1) 1M x 32    (1) 1M x 32    (1) 1M x 32    (1) 256K x 32

     16MB      (1) 4M x 32        NONE           NONE           NONE

     16MB      (1) 1M x 32    (1) 1M x 32    (1) 1M x 32     (1) 1M x 32

     17MB      (1) 4M x 32     (1) 256K x        NONE           NONE
                                   32

     18MB      (1) 4M x 32     (1) 256K x     (1) 256K x        NONE
                                   32             32

                        DRAM CONFIGURATION (CONT)

     Size         Bank 0        Bank 1         Bank 2          Bank 3

     19MB       (1) 4M x 32    (1) 256K x     (1) 256K x    (1) 256K x 32
                                  32             32

     20MB       (1) 4M x 32   (1) 1M x 32       NONE            NONE

     21MB       (1) 4M x 32   (1) 1M x 32     (1) 256K x        NONE
                                                 32

     22MB       (1) 4M x 32   (1) 1M x 32     (1) 256K x    (1) 256K x 32
                                                 32

     24MB       (1) 4M x 32   (1) 1M x 32    (1) 1M x 32        NONE

     25MB       (1) 4M x 32   (1) 1M x 32    (1) 1M x 32    (1) 256K x 32

     28MB       (1) 4M x 32   (1) 1M x 32    (1) 1M x 32     (1) 1M x 32

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

     33MB       (1) 4M x 32   (1) 4M x 32     (1) 256K x        NONE
                                                 32

     34MB       (1) 4M x 32   (1) 4M x 32     (1) 256K x    (1) 256K x 32
                                                 32

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

     37MB       (1) 4M x 32   (1) 4M x 32    (1) 1M x 32    (1) 256K x 32

     40MB       (1) 4M x 32   (1) 4M x 32    (1) 1M x 32     (1) 1M x 32

     48MB       (1) 4M x 32   (1) 4M x 32    (1) 4M x 32        NONE

     49MB       (1) 4M x 32   (1) 4M x 32    (1) 4M x 32    (1) 256K x 32

     52MB       (1) 4M x 32   (1) 4M x 32    (1) 4M x 32     (1) 1M x 32

     64MB       (1) 4M x 32   (1) 4M x 32    (1) 4M x 32     (1) 4M x 32

            CACHE CONFIGURATION

     Size          Bank 0          TAG

     64KB        (8) 8K x 8    (1) 8K x 9

     256KB       (8) 32K x 8   (1) 32K x 9

  CACHE JUMPER CONFIGURATION

   Size      E12        E14

   None      Open      Open

   64KB      Open      Open

  256KB     Closed    Closed

                            CACHE CONFIGURATION

       Type                E1                 E6                E20

   Write through        pins 1 & 2        pins 1 & 2           Open
                         closed             closed

    Write back          pins 2 & 3        pins 2 & 3          Closed
                         closed             closed

  Note: Jumper E20 may not be present on all boards.

                          CPU TYPE CONFIGURATION

        Type             E3            E4            E5           E13

   80486SX(PQFP)      pins 2 & 3    pins 2 & 3   pins 2 & 3       Open
                       closed        closed        closed

    80486SX(PGA)      pins 1 & 2    pins 1 & 2   pins 1 & 2      Closed
                       closed        closed        closed

  SL-series CPUs     pins 2 & 3    pins 2 & 3   pins 2 & 3      Closed
                       closed        closed        closed

        P24T          pins 2 & 3    pins 1 & 2   pins 2 & 3      Closed
                       closed        closed        closed

            CPU TYPE CONFIGURATION (1995 MANUFACTURE DATE ONLY)

      Type               E17               E18                 E19

      Cyrix           pins 2 & 3        pins 2 & 3      pins 2 & 3 closed
                       closed             closed

      Intel           pins 1 & 2        pins 1 & 2      pins 1 & 2 closed
                       closed             closed

  Note: If above jumpers are not present, the mainboard will only support
  the CPU supplied by the factory.

  CPU SPEED CONFIGURATION

    Speed          E15

    25MHz         Closed

    33MHz          Open

    50iMHz        Closed

    66iMHz         Open

    75iMHz        Closed

   100iMHz         Open

  VIDEO MEMORY CONFIGURATION (1994 MANUFACTURE DATE)

       Size             Bank 0            Bank 1

      512KB          (4) 256K x 4          NONE

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

  VIDEO MEMORY CONFIGURATION (1995 MANUFACTURE DATE)

       Size             Bank 0            Bank 1

      512KB         (1) 256K x 16          NONE

       1MB          (1) 256K x 16      (1) 256K x 16

                       MISCELLANEOUS TECHNICAL NOTE

  Board shown is 1994 manufacture date. 1994 boards only accept Intel
  processors. 1995 boards support Intel or Cyrix processors.

