
AST RESEARCH, INC.

ADVANTAGE PLUS! SERIES 486 (MT)

(202528-101)

Processor    80486SX/80487SX/ODP486/ODPR486/80486DX/80486DX2/P24T
Processor    25/33/50(internal)/66(internal)MHz
Speed
Chip Set     Unidentified
Max. Onboard 64MB
DRAM
Cache        64/256KB
BIOS         AST
Dimensions   355mm x 305mm
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

  VGA port                  CN1        Reset switch                E3

  Serial port               CN2        IDE interface LED           E4

  Serial port               CN3        8514 video pass            J19
                                       through connector

  PS/2 mouse port           CN4        IDE interface              J22

  Parallel port             CN5        Floppy drive               J24
                                       interface

  Power LED                 E1         Chassis fan power          J28

                        USER CONFIGURABLE SETTINGS

              Function                  Jumper/Switch         Position

     CMOS memory normal operation            E5                Open

      CMOS memory clear                       E5               Closed

     Factory configured - do not            E14             Pins 1 & 2
      alter                                                    closed

     Parallel port IRQ select IRQ7          E15             Pins 1 & 2
                                                               closed

      Parallel port IRQ select IRQ5          E15             Pins 2 & 3
                                                               closed

     Factory configured - do not            E800            Pins 2 & 3
      alter                                                    closed

     Factory configured - do not            E801            Pins 1 & 2
      alter                                                    closed

     Monitor power conservation             E802            Pins 2 & 3
      disabled                                                 closed

      Monitor power conservation             E802            Pins 1 & 2
      enabled                                                  closed

     Factory configured - do not            E803            Pins 1 & 2
      alter                                                    closed

     Factory configured - do not            E804            Pins 1 & 2
      alter                                                    closed

     On board video enabled                SW1/1               Off

      On board video disabled               SW1/1                On

     Factory configured - do not           SW1/2               Off
      alter

     Flash BIOS normal operation           SW1/3               Off

      Flash BIOS force update at            SW1/3                On
      boot

     Password enabled                      SW1/4               Off

      Password disabled                     SW1/4                On

     Monitor type select color             SW1/5                On

      Monitor type select                   SW1/5               Off
      monochrome

     Factory configured - do not           SW1/6               Off
      alter

     Factory configured - do not           SW1/7               Off
      alter

     Setup access enabled                  SW1/8               Off

      Setup access disabled                 SW1/8                On

                            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) 1M x 36        None           None           None

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

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

                        DRAM CONFIGURATION (CONT)

     Size         Bank 0        Bank 1         Bank 2          Bank 3

     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

     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

     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 9

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

                        CACHE JUMPER CONFIGURATION

      Size                E6                 E7                 E8

      None            Pins 1 & 2            Open               Open
                        closed

      64KB            Pins 1 & 2            Open               Open
                        closed

      256KB           Pins 2 & 3           Closed             Closed
                        closed

                       CPU TYPE CONFIGURATION

    Type        E9         E10         E11         E12        E13

  80486SX      Open       2 & 3       1 & 2       Open       2 & 3

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

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

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

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

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

    P24T       1 & 2      1 & 2       2 & 3      Closed      1 & 2

  Note: Pins designated should be in the closed position.

  CPU SPEED CONFIGURATION

    Speed          E16

    25MHz          Open

    33MHz         Closed

    50iMHz         Open

    66iMHz        Closed

                    VIDEO MEMORY CONFIGURATION

      Size            Bank 0           Bank 1          Bank 2

      512KB       (1) 256K x 16         None            None

       1MB        (1) 256K x 16    (1) 256K x 16        None

       2MB        (1) 256K x 16    (1) 256K x 16    (2) 256K x 16

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

          MISCELLANEOUS TECHNICAL NOTE

  Note: The location of pin 1 is unidentified.

