
BIOSTAR MICROTECH INTERNATIONAL CORPORATION

MB-8500SAC

Processor            CX M1/AM K5/Pentium
Processor Speed      75/90/100/120/133/150/166/180MHz
Chip Set             Unidentified
Video Chip Set       SIS
Maximum Onboard      128MB (EDO supported)
Memory
Maximum Video Memory None
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 port, serial ports (2), feature connector, audio
                     connector
NPU Options          None

[Image]

                                CONNECTIONS

        Function           Label           Function             Label

  PS/2 mouse port            J6       Audio connector            J20

  VGA IDC connector          J7       Chassis fan power          JP12

  VGA D type connector       J8       Speaker                 JP14 pins 1
                                                                 - 4

  Feature connector         J10       Power LED & keylock     JP14 pins 5
                                                                 - 9

  Serial port 2             J11       Turbo LED              JP14 pins 10
                                                                 & 11

  Floppy drive              J12       Reset switch           JP14 pins 12
  interface                                                      & 13

  Serial port 1             J13       Green PC connector     JP14 pins 17
                                                                 & 18

  Parallel port             J14       IDE interface LED      JP14 pins 20
                                                                 & 21

  IDE interface 1           J15       VCC ground             JP14 pins 25
                                      connector                  & 26

  IDE interface 2           J16       32-bit PCI slots        PC1 - PC3

  External battery          J18

  Note: J6, J7 and J8 are optional. Only one will be installed where J6
  is shown.

                        USER CONFIGURABLE SETTINGS

                Setting                   Label            Position

      Jumper information unavailable        J2               N/A

      Jumper information unavailable       JP4           Unidentified

     CMOS memory normal operation         J18               Open

      CMOS memory clear                    J18        Pins 3 & 4 closed

      Battery type select external         J18              Closed

     Jumper information unavailable       J19           Unidentified

     Factory configured - do not          JP2           Unidentified
      alter

     Battery type select internal         JP9              Closed

      Battery type select external         JP9               Open

      Flash BIOS voltage select 12v        JP10       Pins 1 & 2 closed

      Flash BIOS voltage select 5v         JP10       Pins 2 & 3 closed

      Flash BIOS EPROM or 0v flash         JP10              Open

                           DRAM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2        Bank 3

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

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

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

     12MB       (1) 2M x 36   (1) 1M x 36        None          None

     12MB       (1) 1M x 36   (1) 2M x 36        None          None

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

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

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

     20MB       (1) 4M x 36   (1) 1M x 36        None          None

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

                       DRAM CONFIGURATION (CONT)

     Size         Bank 0         Bank 1         Bank 2        Bank 3

     20MB       (1) 1M x 36   (1) 4M x 36        None          None

     24MB       (1) 4M x 36   (1) 2M x 36        None          None

     24MB       (1) 2M x 36   (1) 4M x 36        None          None

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

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

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

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

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

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

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

     40MB       (1) 8M x 36   (1) 2M x 36        None          None

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

     40MB       (1) 2M x 36   (1) 8M x 36        None          None

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

     48MB       (1) 8M x 36   (1) 4M x 36        None          None

     48MB       (1) 4M x 36   (1) 8M x 36        None          None

    100MB       (1) 1M x 36   (1) 8M x 36    (1) 8M x 36    (1) 8M x 36

    104MB       (1) 2M x 36   (1) 8M x 36    (1) 8M x 36    (1) 8M x 36

    112MB       (1) 4M x 36   (1) 8M x 36    (1) 8M x 36    (1) 8M x 36

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

  Note: Board accepts EDO memory.

                            CACHE CONFIGURATION

       Size              Bank 0            Bank 1              TAG

     256KB (A)            None          (2) 32K x 32           None

     256KB (B)         (8) 32K x 8          None            (1) 8K x 8

       512KB           (8) 64K x 8          None           (1) 32K x 8

        1MB           (8) 128K x 8          None           (1) 32K x 8

  Note: Board will either have asynchronous or synchronous pipeline burst
  cache installed.

               CACHE JUMPER CONFIGURATION

            Size                        JP6

         256KB (B)                     Open

           512KB                 Pins 1 & 2 closed

            1MB              Pins 1 & 2, 3 & 4 closed

                            CPU TYPE SELECTION

           Type                      JP15                   JP16

        P54C/CQS/CT            Pins 1 & 2, 3 & 4      Pins 1 & 2 closed
                                    closed

          P55C/CT                    Open             Pins 2 & 3 closed

                            CPU TYPE SELECTION

           Type                      JP15                   JP16

        P54C/CQS/CT            Pins 1 & 2, 3 & 4      Pins 1 & 2 closed
                                    closed

          P55C/CT                    Open             Pins 2 & 3 closed

                            CPU SPEED SELECTION

      Speed              JP7               JP8                JP11

      75MHz              Open             Closed              Open

      90MHz             Closed             Open               Open

      100MHz             Open              Open               Open

      120MHz            Closed             Open        Pins 1 & 2 closed

      133MHz             Open              Open        Pins 1 & 2 closed

      150MHz            Closed             Open         Pins 1 & 2, 3 & 4
                                                             closed

      166MHz             Open              Open         Pins 1 & 2, 3 & 4
                                                             closed

      180MHz            Closed             Open        Pins 3 & 4 closed

          CPU VOLTAGE SELECTION

       Voltage               JP13

   3.4v (VRE CPU)     Pins 1 & 2 closed

    3.5v (VR CPU)     Pins 2 & 3 closed

          CPU VOLTAGE SELECTION

       Voltage               JP16

   3.3v (P55C/CT)     Pins 2 & 3 closed

  5v (P54C/CQS/CT)    Pins 1 & 2 closed

                       MISCELLANEOUS TECHNICAL NOTE

  Depending on board version, a VGA D type port or a serial port could be
  installed where J6 is shown.

