
BIOSTAR MICROTECH INTERNATIONAL, INC.

MB-1500/1575/1590PCT

Processor         Pentium
Processor Speed   75/90/100MHz
Chip Set          Unidentified
Max. Onboard DRAM 128MB
Cache             256/512/1024/2048KB
BIOS              Award
Dimensions        330mm x 218mm
I/O Options       32-bit VESA local bus slots (2), 32-bit PCI slots (3)
NPU Options       None

[Image]

                                CONNECTIONS

  Purpose                Location      Purpose               Location

  External battery         JP8         Turbo switch       JP15 (pins 14 -
                                                                16)

  Speaker             JP15 (pins 1 -   +5v ground         JP15 (pins 17 -
                            4)                                  18)

  Power LED &         JP15 (pins 5 -   Chassis fan             JP32
  keylock                   9)         power

  Turbo LED            JP15 (pins 10   32-bit VESA           PC1 - PC3
                          - 11)        local bus slots

  Reset switch         JP15 (pins 12   32-bit PCI bus        SL1 & SL2
                          - 13)        slots

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Host data wait state select 1           JP4              Open
      wait state

      Host data wait state select 0           JP4             Closed
      wait states

     Back to back I/O delay select 3         JP6              Open
      wait states

      Back to back I/O delay select 0         JP6             Closed
      wait states

     CMOS memory normal operation            JP8           pins 2 & 3
                                                              closed

      CMOS memory clear                       JP8           pins 3 & 4
                                                              closed

      Battery type select external            JP8             Closed

     Monitor type select color               JP14             Open

      Monitor type select monochrome          JP14            Closed

     Factory configured - do not             JP19             Open
      alter

     Buffer type select stand alone          JP26             Open

      Buffer type select loaded               JP26            Closed
      component

     Factory configured - do not             JP31             Open
      alter

     Stop clock select enabled               JP33             Open

      Stop clock select disabled              JP33            Closed

     Bus/core ratio select 2/3 ratio         JP34             Open

      Bus/core ratio select 1/2 ratio         JP34            Closed

     Factory configured - do not             JP35             Open
      alter

                DRAM CONFIGURATION

      Size            Bank 0           Bank 1

       2MB        (2) 256K x 36         NONE

       4MB        (2) 512K x 36         NONE

       4MB        (2) 256K x 36    (2) 256K x 36

       6MB        (2) 256K x 36    (2) 512K x 36

       8MB         (2) 1M x 36          NONE

       8MB        (2) 512K x 36    (2) 512K x 36

      10MB        (2) 256K x 36     (2) 1M x 36

      12MB        (2) 512K x 36     (2) 1M x 36

      16MB         (2) 2M x 36          NONE

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

      18MB        (2) 256K x 36     (2) 2M x 36

      20MB        (2) 512K x 36     (2) 2M x 36

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

      32MB         (2) 4M x 36          NONE

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

      34MB        (2) 256K x 36     (2) 4M x 36

      36MB        (2) 512K x 36     (2) 4M x 36

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

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

      64MB         (2) 8M x 36          NONE

      66MB        (2) 256K x 36     (2) 8M x 36

      68MB        (2) 512K x 36     (2) 8M x 36

      72MB         (2) 1M x 36      (2) 8M x 36

         DRAM CONFIGURATION (CONT)

     Size          Bank 0        Bank 1

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

     96MB        (2) 8M x 36   (2) 4M x 36

     96MB        (2) 4M x 36   (2) 8M x 36

     128MB       (2) 8M x 36   (2) 8M x 36

                      CACHE CONFIGURATION

      Size          Bank 0          Bank 1           TAG

     256KB        (8) 32K x 8        NONE         (1) 8K x 8

     512KB        (8) 32K x 8     (8) 32K x 8    (1) 32K x 8

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

      1MB         (8) 64K x 8     (8) 64K x 8    (1) 32K x 8

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

      2MB        (8) 128K x 8    (8) 128K x 8    (1) 64K x 8

                        CACHE JUMPER CONFIGURATION

   Size      JP20     JP21      JP22     JP23     JP28     JP29     JP30

  256KB      Open     Open      Open     Open     1 & 2    Open    1 & 2

  512KB      Open     Open     Closed    Open     2 & 3    Open    2 & 3

  512KB      Open     Open     Closed    Open     1 & 2   2 & 3    1 & 2

   1MB       Open    Closed    Closed    Open     2 & 3   1 & 2    2 & 3

   1MB       Open    Closed    Closed    2 & 3    1 & 2   2 & 3    1 & 2

   2MB      Closed   Closed    Closed    1 & 2    2 & 3   1 & 2    2 & 3

  Note: Pins designated should be in the closed position.

                        CACHE VOLTAGE CONFIGURATION

         Voltage                   JP17                     JP18

           3v                pins 3 & 5, 4 & 6        pins 3 & 5, 4 & 6
                                  closed                   closed

           5v                pins 1 & 3, 2 & 4        pins 1 & 3, 2 & 4
                                  closed                   closed

  Note: JP17 = Bank 0 and JP18 = Bank 1.

         CPU SPEED CONFIGURATION

  Speed      JP11      JP12      JP13

  75MHz     Closed     Open      Open

  90MHz      Open     Closed     Open

  100MHz    Closed     Open     Closed

  VESA WAIT STATE CONFIGURATION

   Wait states          JP5

  0 wait states        Open

  1 wait state        Closed

   BUS SPEED CONFIGURATION

   CPU speed        JP3

  CPU clock/2       Open

    = 50MHz        Closed

    AT CLOCK CONFIGURATION

  Clock      JP7       JP9

  LCLK/3     Open     Closed

  LCLK/4    Closed     Open

                    PCI IRQ CONFIGURATION

         IRQ                 JP37                 JP38

        IRQ14          pins 2 & 3 closed   pins 1 & 2 closed

        IRQ15          pins 1 & 2 closed   pins 2 & 3 closed

  DRIVE ENABLE CONFIGURATION

  Speed      JP25      JP27

  50MHz      Open      Open

  60MHz     Closed    Closed

  66MHz     Closed    Closed

        FLASH MEMORY CONFIGURATION

       Setting               JP24

        EPROM                Open

      5v flash        pins 2 & 3 closed

      12v flash       pins 1 & 2 closed

