
MICRO-STAR INTERNATIONAL CO., LTD.

MS-6121

Device Type          Mainboard
Processor            Pentium II
Processor Speed      233/266/300/333/350/400/450MHz
Chip Set             Intel 440BX
Maximum Onboard      768MB (EDO & SDRAM supported)
Memory
Audio Chip Set       Yamaha
Cache                256/512KB (located on Pentium II CPU)
BIOS                 Award
Dimensions           207mm x 254mm
I/O Options          32-bit PCI slots (2), Ethernet 10BaseT connector,
                     floppy drive interface, game/MIDI port, green PC
                     connector, IDE interfaces (2), parallel port, PS/2
                     mouse port, serial ports (2), IR connector, USB
                     connectors (2), ATX power connector, line in, line
                     out, microphone in, audio in  CD-ROM, SB-link
                     connector, wake on LAN connector

[Image]

                                CONNECTIONS

  Purpose                 Location     Purpose                  Location

  CPU fan power              C1        Ethernet 10BaseT           CN7
                                       connector

  Parallel port              CN1       Microphone in              CN8

  Serial port 1              CN2       Line in                    CN9

  Serial port 2              CN3       Line out                   CN10

  PS/2 mouse port            CN4       Audio in  CD-ROM           J2

  Game/MIDI port             CN5       SB-link connector           J4

  USB connector              CN6       Temperature sensor         JSOR

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

     CMOS memory normal operation            JBAT          Pins 1 & 2
                                                              closed

      CMOS memory clear                       JBAT          Pins 2 & 3
                                                              closed

      MIC terminal select 3                   JMIC          Pins 1 & 2
                                                              closed

      MIC terminal select 2                   JMIC          Pins 2 & 3
                                                              closed

      Power on mode select boot up by         JP2             Closed
      switch

      Power on mode select immediate          JP2              Open
      boot up

                      DIMM CONFIGURATION

      Size          Bank 0          Bank 1          Bank 2

      8MB         (1) 1M x 64        None            None

      16MB        (1) 1M x 64     (1) 1M x 64        None

      16MB        (1) 2M x 64        None            None

      24MB        (1) 1M x 64     (1) 1M x 64    (1) 1M x 64

      32MB        (1) 2M x 64     (1) 2M x 64        None

      32MB        (1) 4M x 64        None            None

      48MB        (1) 2M x 64     (1) 2M x 64    (1) 2M x 64

      64MB        (1) 4M x 64     (1) 4M x 64        None

      64MB        (1) 8M x 64        None            None

      96MB        (1) 4M x 64     (1) 4M x 64    (1) 4M x 64

     128MB        (1) 8M x 64     (1) 8M x 64        None

     128MB       (1) 16M x 64        None            None

     164MB       (1) 16M x 64     (1) 1M x 64        None

     144MB       (1) 16M x 64     (1) 1M x 64    (1) 1M x 64

     144MB       (1) 16M x 64     (1) 2M x 64        None

     160MB       (1) 16M x 64     (1) 2M x 64    (1) 2M x 64

     160MB       (1) 16M x 64     (1) 4M x 64        None

     192MB       (1) 16M x 64     (1) 4M x 64    (1) 4M x 64

     192MB       (1) 16M x 64     (1) 8M x 64        None

     192MB        (1) 8M x 64     (1) 8M x 64    (1) 8M x 64

     256MB       (1) 16M x 64     (1) 8M x 64    (1) 8M x 64

                  DIMM CONFIGURATION (CONT)

      Size          Bank 0          Bank 1          Bank 2

     256MB       (1) 16M x 64    (1) 16M x 64        None

     256MB       (1) 32M x 64        None            None

     264MB       (1) 32M x 64     (1) 1M x 64        None

     272MB       (1) 32M x 64     (1) 1M x 64    (1) 1M x 64

     272MB       (1) 32M x 64     (1) 2M x 64        None

     288MB       (1) 32M x 64     (1) 2M x 64    (1) 2M x 64

     288MB       (1) 32M x 64     (1) 4M x 64        None

     320MB       (1) 32M x 64     (1) 4M x 64    (1) 4M x 64

     320MB       (1) 32M x 64     (1) 8M x 64        None

     384MB       (1) 32M x 64     (1) 8M x 64    (1) 8M x 64

     384MB       (1) 32M x 64    (1) 16M x 64        None

     384MB       (1) 16M x 64    (1) 16M x 64    (1) 16M x 64

     512MB       (1) 32M x 64    (1) 16M x 64    (1) 16M x 64

     512MB       (1) 32M x 64    (1) 32M x 64        None

     768MB       (1) 32M x 64    (1) 32M x 64    (1) 32M x 64

            Note: Board accepts SDRAM memory.

                     CACHE CONFIGURATION

  Note: 256KB/512KB cache is located on the Pentium II CPU.

                            CPU SPEED SELECTION

    CPU       Clock    Multiplier     SW1/1    SW1/2     SW1/3     SW1/4
   speed     speed

  200MHz     66MHz         3x          On        On       Off       On

  233MHz     66MHz        3.5x         On       Off       Off       On

  266MHz     66MHz         4x          On        On       On        Off

  300MHz     66MHz        4.5x         On       Off       On        Off

  333MHz     66MHz         5x          On        On       Off       Off

  350MHz     100MHz       3.5x         On       Off       Off       On

  400MHz     100MHz        4x          On        On       On        Off

  450MHz     100MHz       4.5x         On       Off       On        Off

[Image]

                                CONNECTIONS

  Purpose                Location     Purpose                 Location

  System fan power          C1        Audio in  CD-ROM          J6

  Chassis fan power         C2        Audio in  CD-ROM          J7

  IDE interface 1           CN1       Soft off power            JSW1
                                      supply

  IDE interface 2           CN2       32-bit PCI slots       PC1  PC2

  Floppy drive              CN3       Power LED &           U1/pins 1  5
  interface                           keylock

  USB connector             CN4       Speaker                U1/pins 7 -
                                                                 10

  IR connector              IR1       IDE interface LED     U1/pins 12 &
                                                                 24

  Green PC LED              J1        Turbo LED             U1/pins 14 &
                                                                 15

  Green PC connector        J2        Green PC connector    U1/pins 17 &
                                                                 18

  Wake on modem             J3        Reset switch          U1/pins 21 &
  connector                                                      22

  Chassis intrusion         J4        Wake on LAN               WOL
  connector                           connector

  Note: The ATX power connector is located on the backside of the riser
  card.

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

     Factory configured - do not           J9           Unidentified
      alter

