FORCOM TECHNOLOGY CORPORATION

B730/B731/B733


Processor         80486SX/80487SX/80486DX
Processor Speed   20/25/33MHz
Chip Set          OPTI
Max. Onboard DRAM 32MB
Cache             64/256KB
BIOS              AMI
Dimensions        328mm x 227mm
I/O Options       None
NPU Options       4167


[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                  Location

  External battery             J1       Speaker                    J5

  Turbo LED                    J3       Reset switch               J6

  Power LED & Keylock          J4       Turbo switch               J7

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Monitor type select monochrome           J2              Open

      Monitor type select color                J2             Closed

  »   CPU speed select iOSC                    J11           pins 2 & 3
                                                              closed

      CPU speed select iOSC/2                  J11           pins 1 & 2
                                                              closed

                            DRAM CONFIGURATION

     Size         Bank 0          Bank 1         Bank 2         Bank 3

     1MB        (4) 256K x 9       NONE           NONE           NONE

     2MB        (4) 256K x 9   (4) 256K x 9       NONE           NONE

     4MB        (4) 1M x 9         NONE           NONE           NONE

     5MB        (4) 256K x 9    (4) 1M x 9        NONE           NONE

     6MB        (4) 256K x 9   (4) 256K x 9    (4) 1M x 9        NONE

     8MB        (4) 1M x 9      (4) 1M x 9        NONE           NONE

     9MB        (4) 256K x 9    (4) 1M x 9     (4) 1M x 9        NONE

     10MB       (4) 256K x 9   (4) 256K x 9    (4) 1M x 9     (4) 1M x 9

     12MB       (4) 1M x 9      (4) 1M x 9     (4) 1M x 9        NONE

     13MB       (4) 256K x 9    (4) 1M x 9     (4) 1M x 9     (4) 1M x 9

     16MB       (4) 1M x 9      (4) 1M x 9     (4) 1M x 9     (4) 1M x 9

     16MB       (4) 4M x 9         NONE           NONE           NONE

     20MB       (4) 1M x 9      (4) 4M x 9        NONE           NONE

     24MB       (4) 1M x 9      (4) 1M x 9     (4) 4M x 9        NONE

     28MB       (4) 1M x 9      (4) 1M x 9     (4) 1M x 9     (4) 4M x 9

     32MB       (4) 4M x 9      (4) 4M x 9        NONE           NONE

     36MB       (4) 4M x 9      (4) 4M x 9     (4) 1M x 9        NONE

     40MB       (4) 4M x 9      (4) 4M x 9     (4) 1M x 9     (4) 1M x 9

     48MB       (4) 4M x 9      (4) 4M x 9     (4) 4M x 9        NONE

     52MB       (4) 4M x 9      (4) 4M x 9     (4) 4M x 9     (4) 1M x 9

     64MB       (4) 4M x 9      (4) 4M x 9     (4) 4M x 9     (4) 4M x 9

  Note:Banks 2 & 3 are optional SIMM sockets and must be added to the
  mainboard by the user.

                    CACHE CONFIGURATION

     Size          Bank 0       Tag (U41)      Tag (U42)

     64KB        (8) 8K x 8    (1) 16K x 4    (1) 8K x 8

     256KB      (8) 32K x 8    (1) 16K x 4    (1) 32K x 8

       CACHE JUMPER CONFIGURATION

   Size      J13       J14       J15

   64KB      Open     Open      Open

  256KB     Closed   Closed    Closed

                          CPU TYPE CONFIGURATION

        Type                 J9               J10               J16

       80486SX           pins 2 & 3          Open              Open
                           closed

       80487SX           pins 1 & 2         Closed           pins 1 & 2
                           closed                             closed

       80486DX           pins 1 & 2         Closed           pins 2 & 3
                           closed                             closed