
APRICOT COMPUTERS LIMITED

XEN-PC/PCM

Processor      CX486M6/CX486CXM6
               &C6/80486SX/CX486M7/80486DX/80486DX2/Pentium
               Overdrive/Pentium
Processor      25/33/40/50(internal)/60/66(internal)/66MHz
Speed
Chip Set       ALI/Intel/VLSI
Max. Onboard   128MB
DRAM
Cache          64/128/256/512KB
BIOS           Unidentified
Dimensions     330mm x 218mm
I/O Options    32-bit PCI local bus slot (on riser card), floppy drive
               interface, IDE interface, parallel port, PS/2 mouse port,
               serial ports (2), VGA port
NPU Options    None

[Image]

                                CONNECTIONS

  Purpose                  Location   Purpose                    Location

  VGA port                   CN1      PS/2 mouse port              CN5

  Parallel port              CN2      Floppy drive interface       CN6

  Serial port 1              CN3      IDE interface                CN7

  Serial port 2              CN4      Riser Card                   SL1

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Factory configured - do not             J10              Open
      alter

     BIOS type select original               JP1              Open

      BIOS type select OEM                    JP1             Closed

     Security enabled                        JP2           pins 1 & 2
                                                              closed

      Security disabled                       JP2           pins 2 & 3
                                                              closed

     Factory configured - do not             JP3              Open
      alter

     BIOS type select Flash                  JP4           pins 1 & 2
                                                              closed

      BIOS type select EPROM                  JP4           pins 2 & 3
                                                              closed

     Floppy drive select normal              JP5           pins 1 & 2
                                                              closed

      Floppy drive select 3 mode              JP5           pins 2 & 3
                                                              closed

     IDE I/O address select 03xH             JP6           pins 1 & 2
                                                              closed

      IDE I/O address select 0BxH             JP6           pins 2 & 3
                                                              closed

     On board video disabled                 JP14             Open

      On board video enabled                  JP14            Closed

     IDE interface enabled                   JP16             Open

      IDE interface disabled                  JP16            Closed

     Factory configured - do not             JP19             Open
      alter

     Key select locked                       JP22             Open

      Key select unlocked                     JP22            Closed

     On board memory enabled                 JP28          pins 1 & 2
                                                              closed

      On board memory disabled                JP28          pins 2 & 3
                                                              closed

  Note: The location of JP2 is unknown.

           DRAM CONFIGURATION (NON PENTIUM)

       Size            Bank 1            Bank 2

       4MB              NONE              NONE

       8MB              NONE           (1) 1M x 36

       8MB           (1) 1M x 36          NONE

       12MB             NONE           (1) 2M x 36

       12MB          (1) 1M x 36       (1) 1M x 36

       16MB          (1) 1M x 36       (1) 2M x 36

       20MB             NONE           (1) 4M x 36

       20MB          (1) 4M x 36          NONE

       24MB          (1) 1M x 36       (1) 4M x 36

       24MB          (1) 4M x 36       (1) 1M x 36

       28MB          (1) 4M x 36       (1) 2M x 36

       36MB          (1) 4M x 36       (1) 4M x 36

  Note: Bank 0 contains 4MB & is factory installed.

                       DRAM CONFIGURATION (PENTIUM)

          Size                    Bank 1                   Bank 2

           8MB                     NONE                     NONE

          16MB                  (1) 1M x 36             (1) 1M x 36

          16MB                  (1) 2M x 36                 NONE

          20MB                  (1) 1M x 36             (1) 2M x 36

          24MB                  (1) 2M x 36             (1) 2M x 36

          24MB                  (1) 4M x 36                 NONE

          28MB                  (1) 1M x 36             (1) 4M x 36

          32MB                  (1) 2M x 36             (1) 4M x 36

          40MB                  (1) 4M x 36             (1) 4M x 36

          40MB                  (1) 8M x 36                 NONE

          44MB                  (1) 1M x 36             (1) 8M x 36

          48MB                  (1) 2M x 36             (1) 8M x 36

          56MB                  (1) 4M x 36             (1) 8M x 36

          72MB                  (1) 8M x 36             (1) 8M x 36

          72MB                 (1) 16M x 36                 NONE

          76MB                  (1) 1M x 36             (1) 16M x 36

          80MB                  (1) 2M x 36             (1) 16M x 36

          88MB                  (1) 4M x 36             (1) 16M x 36

          104MB                 (1) 8M x 36             (1) 16M x 36

          128MB                (1) 16M x 36             (1) 16M x 36

  Note: Bank 0 contains 8MB & is factory installed. When 128MB is
  installed, the on board memory is disabled.

                        CACHE CONFIGURATION

  Note: The location and bank configuration of cache is unknown.

                        CACHE JUMPER CONFIGURATION

      Size              JP24               JP25               JP26

      64KB              Open               Open         pins 1 & 2 closed

      128KB             Open              Closed        pins 2 & 3 closed

      256KB            Closed             Closed        pins 1 & 2 closed

  Note: The jumper settings for 512KB cache is unknown.

                          CPU TYPE CONFIGURATION

    Type      JP11     JP12    JP13     JP15    JP18     JP20      JP27

  CX486M6     2 & 3    1 & 2   2 & 3    2 & 3   2 & 3    1 & 2     Open

  CX486M7     2 & 3    1 & 2   1 & 2    2 & 3   2 & 3    2 & 3     Open

  CXM6 & C6   2 & 3    1 & 2   2 & 3    2 & 3   2 & 3    1 & 2     Open

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

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

  Note: The jumper settings for the Pentium processor are unknown. Pins
  designated should be in the closed position. The location of JP18 is
  unknown.

                          CPU SPEED CONFIGURATION

     Speed         JP7        JP8         JP9        JP10         JP17

     25MHz        2 & 3      2 & 3       1 & 2       2 & 3       2 & 3

     33MHz        1 & 2      2 & 3       1 & 2       2 & 3       2 & 3

     40MHz        1 & 2      1 & 2       2 & 3       1 & 2       1 & 2

    50iMHz        2 & 3      2 & 3       1 & 2       2 & 3       2 & 3

     50MHz        2 & 3      2 & 3       1 & 2       1 & 2       1 & 2

    66iMHz        1 & 2      2 & 3       1 & 2       2 & 3       2 & 3

  Note: The jumper settings for the Pentium processor are unknown. Pins
  designated should be in the closed position.

                       MISCELLANEOUS TECHNICAL NOTE

  Note:Not all options listed in this document are available on each
  motherboard.

