
MICRO-STAR INTERNATIONAL CO., LTD.

MS-5123

Processor           CX M1/Pentium
Processor Speed     75/80/90/100/120/133MHz
Chip Set            SIS
Max. Onboard DRAM   512MB
Cache               256/512/1024KB
BIOS                Award
Dimensions          280mm x 220mm
I/O Options         32-bit PCI slots (3), floppy drive interface, green PC
                    connector, IDE interfaces (2), parallel port, PS/2
                    mouse interface, serial ports (2), VGA feature
                    connector, VGA interface, VRM connector
NPU Options         None

[Image]

                                CONNECTIONS

  Purpose                Location     Purpose                 Location

  Serial port 1             CN1       Speaker               JFP pins 6 -
                                                                 10

  Serial port 2             CN2       Turbo LED             JFP pins 12 &
                                                                 13

  Parallel port             CN3       Turbo switch          JFP pins 15 -
                                                                 17

  VGA interface             CN4       Reset switch          JFP pins 19 &
                                                                 20

  Floppy drive              CN5       IDE interface LED     JFP pins 21 &
  interface                                                      22

  IDE interface 2           CN6       Green PC connector        JG1

  IDE interface 1           CN7       Green PC LED              JG2

  External battery          JB1       32-bit PCI slots       PC1 - PC3

  Chassis fan power        JFAN       PS/2 mouse                PSM
                                      interface

  VGA feature               JFC       VRM connector             VRM
  connector

  Power LED & keylock   JFP pins 1 -
                             5

                        USER CONFIGURABLE SETTINGS

                Function                    Jumper           Position

     PS/2 mouse IRQ12 enabled               JP11             Closed

      PS/2 mouse IRQ12 disabled              JP11              Open

                            DRAM CONFIGURATION

     Size          Bank 0        Bank 1         Bank 2         Bank 3

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

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

      8MB       (1) 2M x 36       NONE           NONE           NONE

      8MB           NONE          NONE        (1) 2M x 36       NONE

      8MB       (1) 1M x 36    (1) 1M x 36       NONE           NONE

      8MB           NONE          NONE        (1) 1M x 36    (1) 1M x 36

     16MB       (1) 4M x 36       NONE           NONE           NONE

     16MB           NONE          NONE        (1) 4M x 36       NONE

     16MB       (1) 2M x 36    (1) 2M x 36       NONE           NONE

     16MB           NONE          NONE        (1) 2M x 36    (1) 2M x 36

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

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

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

     32MB       (1) 8M x 36       NONE           NONE           NONE

     32MB           NONE          NONE        (1) 8M x 36       NONE

     32MB       (1) 4M x 36    (1) 4M x 36       NONE           NONE

     32MB           NONE          NONE        (1) 4M x 36    (1) 4M x 36

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

     40MB       (1) 1M x 36    (1) 1M x 36    (1) 4M x 36    (1) 4M 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) 2M x 36    (1) 2M x 36

     48MB       (1) 2M x 36    (1) 2M x 36    (1) 4M x 36    (1) 4M x 36

     64MB       (1) 16M x 36      NONE           NONE           NONE

     64MB           NONE          NONE        (1) 16M x 36      NONE

                        DRAM CONFIGURATION (CONT)

     Size          Bank 0         Bank 1         Bank 2         Bank 3

     64MB        (1) 8M x 36   (1) 8M x 36        NONE           NONE

     64MB           NONE           NONE       (1) 8M x 36    (1) 8M x 36

     64MB        (1) 4M x 36   (1) 4M x 36    (1) 4M x 36    (1) 4M x 36

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

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

     80MB        (1) 2M x 36   (1) 2M x 36    (1) 8M x 36    (1) 8M x 36

     80MB        (1) 8M x 36   (1) 8M x 36    (1) 2M x 36    (1) 2M x 36

     96MB        (1) 4M x 36   (1) 4M x 36    (1) 8M x 36    (1) 8M x 36

     96MB        (1) 8M x 36   (1) 8M x 36    (1) 4M x 36    (1) 4M x 36

     128MB       (1) 32M x 36      NONE           NONE           NONE

     128MB          NONE           NONE       (1) 32M x 36       NONE

     128MB       (1) 16M x 36  (1) 16M x 36       NONE           NONE

     128MB          NONE           NONE       (1) 16M x 36   (1) 16M x 36

     128MB       (1) 8M x 36   (1) 8M x 36    (1) 8M x 36    (1) 8M x 36

     136MB       (1) 1M x 36   (1) 1M x 36    (1) 16M x 36   (1) 16M x 36

     136MB       (1) 16M x 36  (1) 16M x 36   (1) 1M x 36    (1) 1M x 36

     144MB       (1) 16M x 36  (1) 16M x 36   (1) 2M x 36    (1) 2M x 36

     144MB       (1) 2M x 36   (1) 2M x 36    (1) 16M x 36   (1) 16M x 36

     160MB       (1) 4M x 36   (1) 4M x 36    (1) 16M x 36   (1) 16M x 36

     160MB       (1) 16M x 36  (1) 16M x 36   (1) 4M x 36    (1) 4M x 36

     192MB       (1) 16M x 36  (1) 16M x 36   (1) 8M x 36    (1) 8M x 36

     192MB       (1) 8M x 36   (1) 8M x 36    (1) 16M x 36   (1) 16M x 36

     256MB       (1) 32M x 36  (1) 32M x 36       NONE           NONE

     256MB          NONE           NONE       (1) 32M x 36   (1) 32M x 36

     256MB       (1) 16M x 36  (1) 16M x 36   (1) 16M x 36   (1) 16M x 36

     264MB       (1) 1M x 36   (1) 1M x 36    (1) 32M x 36   (1) 32M x 36

     264MB       (1) 32M x 36  (1) 32M x 36   (1) 1M x 36    (1) 1M x 36

     272MB       (1) 2M x 36   (1) 2M x 36    (1) 32M x 36   (1) 32M x 36

     272MB       (1) 32M x 36  (1) 32M x 36   (1) 2M x 36    (1) 2M x 36

     288MB       (1) 4M x 36   (1) 4M x 36    (1) 32M x 36   (1) 32M x 36

     288MB       (1) 32M x 36  (1) 32M x 36   (1) 4M x 36    (1) 4M x 36

     320MB       (1) 8M x 36   (1) 8M x 36    (1) 32M x 36   (1) 32M x 36

     320MB       (1) 32M x 36  (1) 32M x 36   (1) 8M x 36    (1) 8M x 36

     384MB       (1) 16M x 36  (1) 16M x 36   (1) 32M x 36   (1) 32M x 36

     384MB       (1) 32M x 36  (1) 32M x 36   (1) 16M x 36   (1) 16M x 36

     512MB       (1) 32M x 36  (1) 32M x 36   (1) 32M x 36   (1) 32M x 36

                            CACHE CONFIGURATION

    Size         Bank 0         Bank 1         U13/U17           TAG

    256KB      (4) 32K x 8    (4) 32K x 8        NONE          (1) 8K or
                                                             (1) 16K x 8

    256KB         NONE           NONE        (2) 32K x 32      (1) 8K or
                                                             (1) 16K x 8

  512KB (A)    (4) 64K x 8    (4) 64K x 8        NONE        (1) 16K x 8

  512KB (B)    (4) 64K x 8    (4) 64K x 8        NONE        (1) 16K x 8

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

  Note: U13 & U17 may not be present on all boards.

                        CACHE JUMPER CONFIGURATION

          Size                     JS1                      JS2

          256KB             pins 1 & 2 closed        pins 2 & 3 closed

        512KB (A)           pins 3 & 4 closed        pins 3 & 4 closed

        512KB (B)           pins 2 & 3 closed        pins 2 & 3 closed

           1MB              pins 2 & 3 closed        pins 1 & 2 closed

  Note: 512KB (A) uses 128AK TAG chip and 512KB (B) uses 129AK TAG chip.

                          CPU SPEED CONFIGURATION

   Speed     SW1/1      SW1/2      SW1/3     SW1/4      SW1/5     SW1/6

   75MHz      Off        Off        Off       Off        On         On

  80MHz*      Off        Off        Off        On        On         On

   90MHz      Off        Off        Off       Off        Off        On

  100MHz      Off        Off        Off       Off        Off       Off

  120MHz      Off         On        Off       Off        Off        On

  120MHz*      On        Off        Off        On        On         On

  133MHz      Off         On        Off       Off        Off       Off

  Note: Speeds marked with an * are reserved for future CX M1 CPUs.

  CPU VOLTAGE CONFIGURATION

    Voltage          JV1

     3.38v         Closed

     3.52v          Open

