
NIAGARA SMD TECHNOLOGY, INC.

NT924 (REV. 2)

Processor          AM K5/CX M1/Pentium
Processor Speed    75/90/100/120/133/150/166/180/200MHz
Chip Set           Intel
Maximum Onboard    128MB
Memory
Cache              256/512KB
BIOS               Award/Phoenix
Dimensions         330mm x 218mm
I/O Options        32-bit PCI slots (4), floppy drive interface, green PC
                   connector, IDE interfaces (2), parallel port, PS/2 mouse
                   interface, serial ports (2), cache slot, IR connector
NPU Options        None

[Image]

                                CONNECTIONS

        Function            Label            Function            Label

  IDE interface 1            IDE1      IDE interface LED          J13

  IDE interface 2            IDE2      Green PC LED               J14

  PS/2 mouse interface        J3       Turbo LED                  J15

  Serial port 1               J4       Reset switch               J16

  Serial port 2               J6       Speaker                    J17

  Floppy drive interface      J7       Power LED & keylock        J18

  Parallel port               J8       IR connector               JP2

  Chassis fan power           J9       32-bit PCI slots         PC1 - PC4

  Green PC connector         J12       Cache slot                 SL1

                        USER CONFIGURABLE SETTINGS

                 Setting                     Label           Position

      Keyboard clock select depends on        JP4           Pins 1 & 2
      ISA clock                                               closed

      Keyboard clock select set at            JP4           Pins 2 & 3
      12MHz                                                   closed

      BIOS type select normal operation       JP6           Pins 1 & 2
                                                              closed

      BIOS type select flash mode             JP6           Pins 2 & 3
                                                              closed

     Flash BIOS voltage select 5v            JP7           Pins 1 & 2
                                                              closed

      Flash BIOS voltage select 12v           JP7           Pins 2 & 3
                                                              closed

                DRAM CONFIGURATION

      Size            Bank 0           Bank 1

       8MB         (2) 1M x 32          None

       8MB        (2) 512K x 32    (2) 512K x 32

      10MB         (2) 1M x 32     (2) 256K x 32

      10MB        (2) 256K x 32     (2) 1M x 32

      12MB         (2) 1M x 32     (2) 512K x 32

      12MB        (2) 512K x 32     (2) 1M x 32

      16MB         (2) 2M x 32          None

      16MB         (2) 1M x 32      (2) 1M x 32

      18MB         (2) 2M x 32     (2) 256K x 32

      18MB        (2) 256K x 32     (2) 2M x 32

      20MB         (2) 2M x 32     (2) 512K x 32

      20MB        (2) 512K x 32     (2) 2M x 32

      24MB         (2) 2M x 32      (2) 1M x 32

      24MB         (2) 1M x 32      (2) 2M x 32

      32MB         (2) 4M x 32          None

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

      34MB         (2) 4M x 32     (2) 256K x 32

      34MB        (2) 256K x 32     (2) 4M x 32

      36MB         (2) 4M x 32     (2) 512K x 32

      36MB        (2) 512K x 32     (2) 4M x 32

      40MB         (2) 4M x 32      (2) 1M x 32

      40MB         (2) 1M x 32      (2) 4M x 32

      48MB         (2) 4M x 32      (2) 2M x 32

      48MB         (2) 2M x 32      (2) 4M x 32

      64MB         (2) 8M x 32          None

      64MB         (2) 4M x 32      (2) 4M x 32

      66MB         (2) 8M x 32     (2) 256K x 32

      66MB        (2) 256K x 32     (2) 8M x 32

      68MB         (2) 8M x 32     (2) 512K x 32

      68MB        (2) 512K x 32     (2) 8M x 32

      72MB         (2) 8M x 32      (2) 1M x 32

      72MB         (2) 1M x 32      (2) 8M x 32

             DRAM CONFIGURATION

     Size          Bank 0        Bank 1

     80MB        (2) 8M x 32   (2) 2M x 32

     80MB        (2) 2M x 32   (2) 8M x 32

     96MB        (2) 8M x 32   (2) 4M x 32

     96MB        (2) 4M x 32   (2) 8M x 32

     128MB       (2) 8M x 32   (2) 8M x 32

  Note: Board accepts EDO memory.

                            CACHE CONFIGURATION

    Size        Bank 0      Bank 1          TAG               SL1

  256KB (A)    (2) 32K x     None       (1) 8K/16K x     Not installed
                  32                         8

  256KB (B)      None        None          None           256KB module
                                                           installed

  512KB (A)    (2) 32K x   (2) 32K x   (1) 16K/32K x     Not installed
                  32          32             8

  512KB (B)      None        None          None           512KB module
                                                           installed

  Note: The location of banks 0 & 1 are unidentified.

                  CACHE JUMPER CONFIGURATION

        Size                 JP10                 JP11

     256KB (A/B)       Pins 1 & 2 closed   Pins 1 & 2 closed

     512KB (A/B)       Pins 2 & 3 closed   Pins 2 & 3 closed

                        CPU SPEED SELECTION (CYRIX)

    CPU     Clock     Multiplier   JP3    JP12   JP13     JPS1     JPS2
  speed     speed

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

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

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

  Note: Pins designated should be in the closed position.

                        CPU SPEED SELECTION (INTEL)

    CPU     Clock     Multiplier   JP3    JP12   JP13     JPS1     JPS2
  speed     speed

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

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

  100MHz    66MHz       1.5x       2 &    2 &     2 &     Open    Closed
                                    3      3      3

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

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

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

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

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

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

  Note: Pins designated should be in the closed position.

                            CPU TYPE SELECTION

    Setting          JP8A          JP8B           JP8C           JP8D

     CX M1        Pins 1 & 2     Pins 1 & 2    Pins 1 & 2     Pins 1 & 2
                    closed        closed         closed         closed

     AM K5        Pins 1 & 2     Pins 1 & 2    Pins 1 & 2     Pins 1 & 2
                    closed        closed         closed         closed

    P54C/CTB      Pins 1 & 2     Pins 1 & 2    Pins 1 & 2     Pins 1 & 2
                    closed        closed         closed         closed

      P55C        Pins 2 & 3     Pins 2 & 3    Pins 2 & 3     Pins 2 & 3
                    closed        closed         closed         closed

