IPC CORPORATION, LTD.

IPC VALUEMAGIC SERIES DESKTOP

MB486HE#21

Processor      80486SX/80487SX/80486DX/ODP486SX/80486DX2/Pentium Overdrive
Processor      25/33/50(internal)/66(internal)MHz
Speed
Chip Set       UMC
Max. Onboard   32MB
DRAM
Cache          64/128/256KB
BIOS           AMI
Dimensions     330mm x 218mm
I/O Options    None
NPU Options    None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                   Location

  Turbo switch                J1       Reset switch                J4

  Turbo LED                   J2       Power LED & keylock         J5

  Speaker                     J3       External battery            J6

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   High speed write wait state             W22             Closed
      select 1 wait state

      High speed write wait state             W22              Open
      select 0 wait states

  »   Factory configured - do not             W23              Open
      alter

  »   CPU clock select 1x                     W24              Open

      CPU clock select 2x                     W24             Closed

  »   Factory configured - do not             W25              Open
      alter

  »   Monitor type select color               W26             Closed

      Monitor type select monochrome          W26              Open

  »   CMOS memory normal operation            W27             Closed

      CMOS memory clear                       W27              Open

           DRAM CONFIGURATION

     Size        Bank 0        Bank 1

     4MB        (4) 1M x 9      NONE

     8MB        (4) 1M x 9   (4) 1M x 9

     16MB       (4) 4M x 9      NONE

     32MB       (4) 4M x 9   (4) 4M x 9

                    CACHE CONFIGURATION

     Size          Bank 0         Bank 1          TAG

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

     128KB      (4) 32K x 8        NONE       (1) 8K x 8

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

                        CACHE JUMPER CONFIGURATION

   Size       W1        W2       W3      W4      W5       W6        W7

   64KB     Closed    Closed    1 & 2   1 & 2   1 & 2    Open      Open

   128KB    Closed    Closed    2 & 3   1 & 2   2 & 3    1 & 2     Open

   256KB    Closed    Closed    2 & 3   2 & 3   1 & 2    2 & 3     Open

            Note: Pins designated should be in the closed position..

                    CACHE JUMPER CONFIGURATION (CON’T)

  Size     W13      W14      W15    W16    W17    W18      W19      W20

  64KB     Open     Open     Open   Open   Open   Open    Open      Open

  128KB   Closed    Open     Open   Open   Open   Open    Open     Closed

  256KB   Closed   Closed    Open   Open   Open   Open    Closed   Closed

            Note: The location of the above jumpers are unidentified.

                          CPU TYPE CONFIGURATION

      Type           W8          W9          W10        W11        W12

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

  80486SX (PGA)     Open        Open        2 & 3       Open      2 & 3

    ODP486SX        1 & 2       Open       1 & 2, 3     Open      1 & 2
                                             & 4

     80487SX        1 & 2       Open       1 & 2, 3     Open      1 & 2
                                             & 4

  80486DX (PQFP)    2 & 3      Closed      Closed      1 & 2       Open

  80486DX (PGA)     2 & 3       Open       1 & 2, 3     Open      2 & 3
                                             & 4

    80486DX2        2 & 3       Open       1 & 2, 3     Open      2 & 3
                                             & 4

     Pentium        1 & 2       Open       1 & 2, 3     Open      1 & 2
    Overdrive                                & 4

  Note: Pins designated should be in the closed position. The locations
  of W8 & W9 are unidentified.

  CPU SPEED CONFIGURATION

    Speed          W21

    25MHz          Open

    33MHz          Open

    50iMHz        Closed

    66iMHz        Closed