
AST RESEARCH, INC.

BRAVO LC (LC2) (202560-XXX)

Processor     80486SX/80487SX/80486DX/ODP486SX/80486DX2/Pentium Overdrive
Processor     25/33/50(internal)/66(internal)MHz
Speed
Chip Set      AST
Max. Onboard  64MB
DRAM
Cache         64/256KB
BIOS          AST
Dimensions    330mm x 218mm
I/O Options   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 mouse port             J12      Serial port 2               J20

  Parallel port               J13      IDE interface               J22

  Serial port 1               J14      Floppy drive interface      J24

  VGA port                    J18      Chassis fan power           J28

  VGA feature connector       J19      Front panel connector       J29

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Monitor type select color                E4             Closed

      Monitor type select monochrome           E4              Open

     Video adapter enabled                    E5             Closed

      Video adapter disabled                   E5              Open

     CMOS memory normal operation             E6             Closed

      CMOS memory clear                        E6              Open

     Parallel port IRQ select IRQ7           E12           pins 1 & 2
                                                              closed

      Parallel port IRQ select IRQ5           E12           pins 2 & 3
                                                              closed

     Factory configured - do not             E17           pins 1 & 2
      alter                                                   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

     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

                        DRAM CONFIGURATION (CONT)

     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 36       NONE

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

   64KB      Open     Open      Open

  256KB     Closed   Closed    Closed

                         CPU UPGRADE CONFIGURATION

       Type            E11          E13        E14       E15       E16

       None            Open        Open       1 & 2     1 & 2     1 & 2

     80846SX          Closed       Open       1 & 2     1 & 2     1 & 2

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

   80486DX/DX2        Closed      Closed      2 & 3     1 & 2     2 & 3

     Overdrive        Closed      Closed      2 & 3     1 & 2     2 & 3
      (ODPR)

  Overdrive (ODP)     Closed      Closed      1 & 2     1 & 2     2 & 3

  Overdrive (DX2)     Closed      Closed      1 & 2     2 & 3     2 & 3

   CPU SPEED CONFIGURATION

  Speed       E9       E10

  25MHz     Closed    Closed

  33MHz      Open     Closed

  50iMHz    Closed    Closed

  66iMHz     Open     Closed

                  VIDEO MEMORY CONFIGURATION

        Size                Bank 0               Bank 1

        512KB           (4) 256KB x 4             NONE

         1MB            (4) 256KB x 4        (4) 256KB x 4

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

