
YOUNG MICRO SYSTEMS, INC.

MB-5820

Processor           CX M1/AM K5/Pentium
Processor Speed     75/90/100/120/133/150/166/180/200MHz
Chip Set            Intel
Video Chip Set      None
Maximum Onboard     128MB (EDO supported)
Memory
Maximum Video       None
Memory
Cache               256/512KB
BIOS                Award
Dimensions          250mm x 220mm
I/O Options         32-bit PCI slots (4), floppy drive interface, green PC
                    connector, IDE interfaces (2), parallel port, PS/2
                    mouse port, serial ports (2), IR connector, USB
                    connector
NPU Options         None

[Image]

                                CONNECTIONS

  Purpose                Location      Purpose                Location

  Serial port 2             CN1        IR connector          J1 pins 6 -
                                                                 10

  Serial port 1             CN2        Green PC connector    J1 pins 14 &
                                                                 15

  Parallel port             CN3        Speaker              J2 pins 1 - 4

  Floppy drive              CN4        Reset switch         J2 pins 5 & 6
  interface

  IDE interface 1           CN5        Power LED &           J2 pins 8 -
                                       keylock                   12

  IDE interface 2           CN6        Turbo LED             J2 pins 14 &
                                                                 15

  PS/2 mouse port           CN7        32-bit PCI slots       PC1  PC4

  IDE interface LED     J1 pins 1 -    USB connector             USB
                             4

                        USER CONFIGURABLE SETTINGS

                Function
                                             Label
                                                             Position

  
      CMOS memory normal operation
                                              JP6
                                                            Pins 1 & 2
                                                              closed


      CMOS memory clear
                                              JP6
                                                            Pins 2 & 3
                                                              closed

                         DIMM/DRAM CONFIGURATION

     Size          Bank 0         Bank 1        Bank 2         Bank 3

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

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

     16MB       (2) 2M x 36        None          None           None

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

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

     16MB       (2) 1M x 36        None          None        (1) 1M x 64

     24MB           None       (2) 2M x 36    (1) 1M x 64       None

     32MB       (2) 4M x 36        None          None           None

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

     32MB       (2) 2M x 36        None          None        (1) 2M x 64

     40MB       (2) 4M x 36    (2) 1M x 36       None           None

     40MB       (2) 4M x 36        None          None        (1) 1M x 64

     48MB       (2) 2M x 36        None          None        (1) 4M x 64

     48MB       (2) 4M x 36    (2) 2M x 36       None           None

     48MB       (2) 4M x 36        None          None        (1) 2M x 64

     64MB       (2) 8M x 36        None          None           None

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

     64MB       (2) 4M x 36    (2) 4M x 36       None           None

     64MB       (2) 4M x 36        None          None        (1) 4M x 64

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

     72MB       (2) 8M x 36    (2) 1M x 36       None           None

     72MB       (2) 8M x 36        None          None        (1) 1M x 64

     80MB           None       (2) 2M x 36    (1) 8M x 64       None

     80MB       (2) 8M x 36    (2) 2M x 36       None           None

                     DIMM/DRAM CONFIGURATION (CONT)

     Size
                   Bank 0
                                  Bank 1
                                                Bank 2
                                                               Bank 3

     96MB
                (2) 4M x 36
                                   None
                                                 None
                                                             (1) 8M x 64

     96MB
                (2) 8M x 36
                               (2) 4M x 36
                                                 None
                                                                None

     96MB
                    None
                               (2) 8M x 36
                                              (1) 4M x 64
                                                                None

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

     128MB
                (2) 8M x 36
                               (2) 8M x 36
                                                 None
                                                                None

     128MB
                (2) 8M x 36
                                   None
                                                 None
                                                             (1) 8M x 64

  Note: Board accepts EDO memory.

              CACHE CONFIGURATION

      Size          Bank 0           TAG

     256KB        (2) 32K x 32   Unidentified

     512KB        (2) 64K x 32   Unidentified

                        CPU SPEED SELECTION (CYRIX)

   CPU
  speed
            Clock
           speed
                     Multiplier
                                  JP2
                                        JP3
                                              JP4
                                                     JP8
                                                             JP10
                                                                    JP11

  120MHz
           50MHz
                        2x
                                  2 &
                                  3
                                        2 &
                                         3
                                              1 &
                                               2
                                                    Closed
                                                              2 &
                                                              3
                                                                    1 & 2

  133MHz
           55MHz
                        2x
                                  1 &
                                  2
                                        2 &
                                         3
                                              1 &
                                               2
                                                     Open
                                                              2 &
                                                              3
                                                                    1 & 2

  150MHz
           60MHz
                        2x
                                  2 &
                                  3
                                        1 &
                                         2
                                              1 &
                                               2
                                                     Open
                                                              2 &
                                                              3
                                                                    1 & 2

  166MHz
           66MHz
                        2x
                                  1 &
                                  2
                                        1 &
                                         2
                                              1 &
                                               2
                                                     Open
                                                              2 &
                                                              3
                                                                    1 & 2

  200MHz
           75MHz
                        2x
                                  1 &
                                  2
                                        1 &
                                         2
                                              2 &
                                               3
                                                     Open
                                                              2 &
                                                              3
                                                                    1 & 2

  Note: Pins designated should be in the closed position.

                         CPU SPEED SELECTION (AMD)

   CPU      Clock    Multiplier   JP2   JP3   JP4    JP8     JP10   JP11
  speed    speed

  75MHz    50MHz       1.5x       2 &   2 &   1 &   Closed    1 &   1 & 2
                                  3      3     2              2

  90MHz    60MHz       1.5x       2 &   1 &   1 &    Open     1 &   1 & 2
                                  3      2     2              2

  100MHz   66MHz       1.5x       1 &   1 &   1 &    Open     1 &   1 & 2
                                  2      2     2              2

  120MHz   60MHz        2x        2 &   1 &   1 &    Open     1 &   1 & 2
                                  3      2     2              2

  133MHz   66MHz        2x        1 &   1 &   1 &    Open     1 &   1 & 2
                                  2      2     2              2

  150MHz   60MHz       2.5x       2 &   1 &   1 &    Open     2 &   1 & 2
                                  3      2     2              3

  166MHz   66MHz       2.5x       1 &   1 &   1 &    Open     2 &   1 & 2
                                  2      2     2              3

  Note: Pins designated should be in the closed position.

                        CPU SPEED SELECTION (INTEL)

   CPU
  speed
            Clock
           speed
                     Multiplier
                                  JP2
                                        JP3
                                              JP4
                                                     JP8
                                                             JP10
                                                                    JP11

  75MHz
           50MHz
                       1.5x
                                  2 &
                                  3
                                        2 &
                                         3
                                              1 &
                                               2
                                                    Closed
                                                              1 &
                                                              2
                                                                    1 & 2

  90MHz
           60MHz
                       1.5x
                                  2 &
                                  3
                                        1 &
                                         2
                                              1 &
                                               2
                                                     Open
                                                              1 &
                                                              2
                                                                    1 & 2

  100MHz
           66MHz
                       1.5x
                                  1 &
                                  2
                                        1 &
                                         2
                                              1 &
                                               2
                                                     Open
                                                              1 &
                                                              2
                                                                    1 & 2

  120MHz
           60MHz
                        2x
                                  2 &
                                  3
                                        1 &
                                         2
                                              1 &
                                               2
                                                     Open
                                                              2 &
                                                              3
                                                                    1 & 2

  133MHz
           66MHz
                        2x
                                  1 &
                                  2
                                        1 &
                                         2
                                              1 &
                                               2
                                                     Open
                                                              2 &
                                                              3
                                                                    1 & 2

  150MHz
           60MHz
                       2.5x
                                  2 &
                                  3
                                        1 &
                                         2
                                              1 &
                                               2
                                                     Open
                                                              2 &
                                                              3
                                                                    2 & 3

  166MHz
           66MHz
                       2.5x
                                  1 &
                                  2
                                        1 &
                                         2
                                              1 &
                                               2
                                                     Open
                                                              2 &
                                                              3
                                                                    2 & 3

  180MHz
           60MHz
                        3x
                                  2 &
                                  3
                                        1 &
                                         2
                                              1 &
                                               2
                                                     Open
                                                              1 &
                                                              2
                                                                    2 & 3

  200MHz
           66MHz
                        3x
                                  1 &
                                  2
                                        1 &
                                         2
                                              1 &
                                               2
                                                     Open
                                                              1 &
                                                              2
                                                                    2 & 3

  Note: Pins designated should be in the closed position.

                   CPU VOLTAGE SELECTION (SINGLE)

        Voltage                 JP7                    JP9

         3.38v                 2 & 4           1 & 2, 4 & 5, 7 & 8

         3.52v                 4 & 6           1 & 2, 4 & 5, 7 & 8

  Note: Pins designated should be in the closed position.

                       CPU VOLTAGE SELECTION (DUAL)

       Voltage
                           V core
                                              JP7
                                                                JP9

        3.38v
                            2.5v
                                             1 & 3
                                                          2 & 3, 5 & 6, 7
                                                                & 9

        3.38v
                            2.8v
                                             3 & 5
                                                          2 & 3, 5 & 6, 7
                                                                & 9

  Note: Pins designated should be in the closed position.

