
DIGITAL SCIENTIFIC RESEARCH, INC.

ISBB-5U4

Processor          80386SX (located on external CPU card).
Processor Speed    25/33 MHz
Chip Set           ACC/OPTI/ATMEL
Max. Onboard DRAM  32MB
Cache              None
BIOS               AMI
Dimensions         220mm X 220mm
I/O Options        Bus mouse, floppy drive interface, game port, IDE
                   interface,

                   parallel port, CPU card slot, serial ports (2)
NPU Options        80387SX (located on external CPU card)

[Image]

                                CONNECTIONS

  Purpose                 Location     Purpose                  Location

  Bus mouse connector        CN1       External keyboard          JP2
                                       connector

  Serial port 1             COMA       External battery           JP10

  Serial port 2             COMB       Keylock and power LED      JP12

  Game port                  J2        Turbo LED                  JP13

  Bus mouse port             J3A       Reset switch               JP14

  Floppy drive               J5        IDE LED                    JP16
  interface

  IDE interface              J8        Turbo switch               JP18

  Parallel port              J10       CPU card slots           SL1, SL2
  connector

  Speaker                    JP1

  Note:The game port is optional and the location is unidentified by the
  manufacturer.

                        USER CONFIGURABLE SETTINGS

                Function                    Jumper           Position

     Floppy adaptor enabled                  JP3           pins 2 & 3
                                                              closed

      Floppy adaptor disabled                 JP3           pins 1 & 2
                                                              closed

     IDE adaptor enabled                     JP4           pins 2 & 3
                                                              closed

      IDE adaptor disabled                    JP4           pins 1 & 2
                                                              closed

     LPT set at IRQ7                        JP15           pins 2 & 3
                                                              closed

      LPT set at IRQ5                        JP15           pins 1 & 2
                                                              closed

                     SERIAL PORT CONFIGURATION

  Port 1 (COMA)   Port 2 (COMB)        JP7              JP8

      COM1             COM2           Closed           Closed

      COM1             COM4           Closed            Open

      COM3             COM2            Open            Closed

      COM3             COM4            Open             Open

    Disabled           COM2            Open            Closed

    Disabled           COM4            Open             Open

      COM1           Disabled         Closed            Open

      COM3           Disabled          Open             Open

    Disabled         Disabled          Open             Open

              DRAM CONFIGURATION

      Size          Bank 0          Bank 1

      1MB         (4) 256K x 9       NONE

      2MB         (4) 256K x 9   (4) 256K x 9

      4MB         (4) 1M x 9         NONE

      5MB         (4) 1M x 9     (4) 256K x 9

      8MB         (4) 1M x 9      (4) 1M x 9

      16MB        (4) 4M x 9         NONE

      17MB        (4) 4M x 9     (4) 256K x 9

      20MB        (4) 4M x 9      (4) 1M x 9

      32MB        (4) 4M x 9      (4) 4M x 9

                       BUS MOUSE PORT CONFIGURATION

                 Setting                                JP5

               Enabled / IRQ5                         Closed

                    IRQ 4                               Open

                     IRQ3                               Open

                   IRQ 2/9                              Open

                   Disabled                             Open

                        PARALLEL PORT CONFIGURATION

                 Setting                                JP6

            LPT 1/ address 378h                       Closed

             LPT 2 / address 278h                       Open

                   Disabled                             Open

Processor              Dependant on external CPU card installed.
Processor Speed        Dependant on external CPU card installed.
Chip Set               ACC
Max. Onboard DRAM      32MB
Cache                  None
BIOS                   Dependant on external CPU card installed.
Dimensions             330mm x 218mm
I/O Options            Proprietary external CPU card slot, bus mouse port,
                       floppy drive interface,

                       IDE interface, parallel ports (2), PS/2 mouse port,
                       serial port
NPU Options            None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  Bus mouse connector         CN4      Speaker                     JP1

  Serial port (COMB)          J1       Front keyboard header       JP2

  Bus mouse port              J3A      External battery           JP10

  Serial port (COMA)          J4       Power LED & keylock        JP12

  Floppy drive interface      J5       Turbo LED                  JP13

  Serial port                 J6       Reset switch               JP14

  Parallel port 1             J7       IDE interface LED          JP16

  IDE interface               J8       Turbo switch               JP18

  Parallel port 2             J10      CPU expansion card       SL1, SL2
                                       slots

                        USER CONFIGURABLE SETTINGS

                Function                    Jumper           Position

      Floppy disk drive enabled               JP3           pins 1 & 2
                                                              closed

      Floppy disk drive disabled              JP3           pins 2 & 3
                                                              closed

     IDE hard disk drive enabled             JP4           pins 1 & 2
                                                              closed

      IDE hard disk drive disabled            JP4           pins 2 & 3
                                                              closed

      Bus mouse enabled                       JP5           pins 1 & 2
                                                              closed

      Bus mouse disabled                      JP5              Open

     LPT interrupt select IRQ7              JP15           pins 1 & 2
                                                              closed

      LPT interrupt select IRQ5              JP15           pins 2 & 3
                                                              closed

                         SERIAL PORT CONFIGURATION

     Port 1 (COMA)       Port 2 (COMB)         JP7              JP8

          COM1              COM2           pins 1 & 2       pins 1 & 2
                                              closed           closed

           COM1              COM4           pins 1 & 2       pins 3 & 4
                                              closed           closed

           COM1            Disabled         pins 1 & 2       pins 5 & 6
                                              closed           closed

           COM3              COM2           pins 3 & 4       pins 1 & 2
                                              closed           closed

           COM3            Disabled         pins 3 & 4       pins 5 & 6
                                              closed           closed

         Disabled            COM2           pins 5 & 6       pins 1 & 2
                                              closed           closed

         Disabled            COM4           pins 5 & 6       pins 3 & 4
                                              closed           closed

         Disabled          Disabled         pins 5 & 6       pins 5 & 6
                                              closed           closed

                        PARALLEL PORT CONFIGURATION

                   LPT                                  JP6

                   LPT1/2                       pins 1 & 2 closed

                    LPT2/3                       pins 3 & 4 closed

                   Disabled                      pins 5 & 6 closed

                    BUS MOUSE INTERRRUPT CONFIGURATION

                Setting                                JP5

                   IRQ5                        pins 3 & 4 closed

                    IRQ4                        pins 5 & 6 closed

                    IRQ3                        pins 7 & 8 closed

                    IRQ2                       pins 9 & 10 closed

              DRAM CONFIGURATION

      Size          Bank 0          Bank 1

      1MB         (4) 256K x 9       NONE

      2MB         (4) 256K x 9   (4) 256K x 9

      4MB         (4) 1M x 9         NONE

      5MB         (4) 256K x 9    (4) 1M x 9

      8MB         (4) 1M x 9      (4) 1M x 9

      16MB        (4) 4M x 9         NONE

      32MB        (4) 4M x 9      (4) 4M x 9

Processor            Dependant on external CPU card installed.
Processor Speed      Dependant on external CPU card installed.
Chip Set             ACC/OPTi/ATMEL
Max. Onboard DRAM    64MB
Cache                Dependant on external CPU card installed.
BIOS                 AMI
I/O Options          CPU card slot, floppy drive interface, game port, IDE
                     interface,

                     parallel port, PS/2 mouse port, serial ports (2)
NPU Options          Dependant on external CPU card installed.

[Image]

                                CONNECTIONS

  Purpose                 Location     Purpose                 Location

  Serial port 1              J1        External battery          JP10

  Serial port 2              J4        Power LED & keylock       JP12

  Floppy drive               J5        Turbo LED                 JP13
  interface

  IDE inteface               J8        Reset switch              JP14

  Parallel port             J10        IDE interface LED         JP16

  External keyboard         JP1        Turbo switch              JP18
  connector

  Speaker                   JP5        CPU card slots          SL1, SL2

  Note:The PS/2 mouse is optional and the connector location is
  unidentified by the manufacturer.

                        USER CONFIGURABLE SETTINGS

                Function                    Jumper           Position

     Power good signal detect normal         JP2              Open

      Power good signal detect delayed        JP2             Closed

     Hardware select 82C721 I/O chip        JP30           pins 1 & 2
      enabled                                                 closed

      Hardware select 82C721 I/O chip        JP30           pins 2 & 3
      disabled                                                closed

                            DRAM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2         Bank 3

     1MB         (1) 256K x       NONE           NONE           NONE
                    36

     2MB         (1) 256K x    (1) 256K x        NONE           NONE
                    36             36

     3MB         (1) 256K x    (1) 256K x     (1) 512K x          c
                    36             36             36

     3MB         (1) 512K x    (1) 256K x        NONE           NONE
                    36             36

     4MB         (1) 256K x    (1) 256K x     (1) 256K x    (1) 256K x 36
                    36             36             36

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

     4MB         (1) 256K x    (1) 256K x     (1) 512K x        NONE
                    36             36             36

     4MB         (1) 512K x    (1) 256K x     (1) 256K x        NONE
                    36             36             36

     5MB         (1) 512K x    (1) 256K x     (1) 512K x        NONE
                    36             36             36

     5MB        (1) 1M x 36    (1) 256K x        NONE           NONE
                                   36

     5MB         (1) 256K x   (1) 1M x 36        NONE           NONE
                    36

     6MB        (1) 1MBx 36    (1) 256K x     (1) 256K x        NONE
                                   36             36

     6MB         (1) 512K x    (1) 256K x     (1) 512K x    (1) 256K x 36
                    36             36             36

     7MB         (1) 512K x   (1) 1M x 36     (1) 256K x        NONE
                    36                            36

     7MB         (1) 256K x   (1) 1M x 36     (1) 512K x        NONE
                    36                            36

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

     9MB         (1) 512K x   (1) 1M x 36     (1) 512K x    (1) 256K x 36
                    36                            36

     9MB        (1) 1M x 36   (1) 1M x 36     (1) 256K x        NONE
                                                  36

     9MB        (1) 2M x 36    (1) 256K x        NONE           NONE
                                   36

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

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

     10MB       (1) 2M x 36    (1) 256K x     (1) 256K x        NONE
                                   36             36

     10MB        (1) 256K x    (1) 256K x    (1) 2M x 36        NONE
                    36             36

     11MB        (1) 512K x    (1) 256K x    (1) 2M x 36        NONE
                    36             36

     11MB       (1) 2M x 36    (1) 256K x     (1) 512K x        NONE
                                   36             36

     11MB        (1) 512K x    (1) 256K x    (1) 1M x 36     (1) 1M x 36
                    36             36

     11MB       (1) 1M x 36   (1) 1M x 36     (1) 512K x    (1) 256K x 36
                                                  36

     12MB       (1) 1M x 36   (1) 1M x 36    (1) 1M x 36        NONE

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

     13MB       (1) 1M x 36   (1) 1M x 36    (1) 1M x 36    (1) 256K x 36

     13MB        (1) 256K x   (1) 1M x 36    (1) 1M x 36     (1) 1M x 36
                    36

     13MB       (1) 2M x 36   (1) 1M x 36     (1) 256K x        NONE
                                                  36

     13MB       (1) 1M x 36    (1) 256K x    (1) 2M x 36        NONE
                                   36

     14MB        (1) 512K x   (1) 1M x 36    (1) 1M x 36     (1) 1M x 36
                    36

                      DRAM CONFIGURATION (CONTINUED)

     Size         Bank 0         Bank 1         Bank 2         Bank 3

     14MB       (1) 1M x 36   (1) 1M x 36     (1) 512K x     (1) 1M x 36
                                                  36

     14MB        (1) 512K x   (1) 1M x 36    (1) 2M x 36        NONE
                    36

     14MB       (1) 2M x 36   (1) 1M x 36     (1) 512K x        NONE
                                                  36

     14MB       (1) 2M x 36   (1) 1M x 36     (1) 256K x    (1) 256K x 36
                                                  36

     14MB        (1) 256K x    (1) 256K x    (1) 2M x 36     (1) 1M x 36
                    36             36

     15MB       (1) 2M x 36   (1) 1M x 36     (1) 512K x    (1) 256K x 36
                                                  36

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

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

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

     17MB       (1) 4M x 36    (1) 256K x        NONE           NONE
                                   36

     17MB       (1) 4M x 36    (1) 256K x        NONE           NONE
                                   36

     17MB       (1) 2M x 36    (1) 256K x    (1) 2M x 36        NONE
                                   36

     17MB       (1) 2M x 36   (1) 1M x 36    (1) 1M x 36    (1) 256K x 36

     17MB       (1) 1M x 36   (1) 1M x 36    (1) 2M x 36    (1) 256K x 36

     18MB       (1) 4M x 36    (1) 256K x     (1) 256K x        NONE
                                   36             36

     18MB        (1) 256K x    (1) 256K x    (1) 4M x 36        NONE
                    36             36

     18MB       (1) 2M x 36    (1) 256K x    (1) 2M x 36    (1) 256K x 36
                                   36

     19MB        (1) 512K x   (1) 4M x 36     (1) 256K x        NONE
                    36                            36

     19MB       (1) 4M x 36    (1) 256K x     (1) 512K x        NONE
                                   36             36

     20MB       (1) 2M x 36   (1) 1M x 36    (1) 2M x 36        NONE

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

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

     20MB        (1) 512K x   (1) 4M x 36     (1) 512K x        NONE
                    36                            36

     21MB        (1) 512K x   (1) 4M x 36     (1) 512K x    (1) 256K x 36
                    36                            36

     21MB       (1) 4M x 36    (1) 256K x    (1) 1M x 36        NONE
                                   36

     21MB       (1) 2M x 36   (1) 1M x 36    (1) 2M x 36    (1) 256K x 36

     21MB       (1) 2M x 36    (1) 256K x    (1) 2M x 36     (1) 1M x 36
                                   36

     21MB        (1) 256K x   (1) 1M x 36    (1) 4M x 36        NONE
                    36

     21MB       (1) 4M x 36    (1) 256K x    (1) 1M x 36        NONE
                                   36

     22MB       (1) 4M x 36    (1) 256K x    (1) 1M x 36    (1) 256K x 36
                                   36

     22MB        (1) 256K x    (1) 256K x    (1) 1M x 36     (1) 4M x 36
                    36             36

     23MB       (1) 4M x 36    (1) 512K x     (1) 256K x     (1) 1M x 36
                                   36             36

     23MB        (1) 256K x    (1) 256K x     (1) 512K x     (1) 4M x 36
                    36             36             36

     23MB       (1) 1M x 36    (1) 256K x    (1) 4M x 36    (1) 512K x 36
                                   36

     23MB        (1) 512K x   (1) 4M x 36     (1) 256K x     (1) 1M x 36
                    36                            36

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

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

     24MB       (1) 4M x 36   (1) 1M x 36    (1) 1M x 36        NONE

     24MB       (1) 1M x 36   (1) 1M x 36    (1) 4M x 36        NONE

     25MB       (1) 4M x 36   (1) 1M x 36    (1) 1M x 36    (1) 256K x 36

     25MB        (1) 256K x   (1) 1M x 36    (1) 1M x 36     (1) 4M x 36
                    36

     25MB       (1) 2M x 36    (1) 256K x    (1) 4M x 36        NONE
                                   36

     25MB       (1) 4M x 36    (1) 256K x    (1) 2M x 36        NONE
                                   36

                      DRAM CONFIGURATION (CONTINUED)

     Size         Bank 0         Bank 1         Bank 2         Bank 3

     26MB       (1) 2M x 36   (1) 4M x 36     (1) 256K x    (1) 256K x 36
                                                  36

     26MB        (1) 256K x    (1) 256K x    (1) 2M x 36     (1) 4M x 36
                    36             36

     26MB        (1) 512K x   (1) 4M x 36    (1) 2M x 36        NONE
                    36

     26MB       (1) 2M x 36   (1) 4M x 36     (1) 512K x        NONE
                                                  36

     27MB       (1) 2M x 36   (1) 4M x 36     (1) 512K x    (1) 256K x 36
                                                  36

     27MB        (1) 512K x    (1) 256K x    (1) 2M x 36     (1) 4M x 36
                    36             36

     28MB       (1) 2M x 36   (1) 4M x 36    (1) 1M x 36        NONE

     28MB       (1) 4M x 36   (1) 1M x 36    (1) 2M x 36        NONE

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

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

     29MB       (1) 2M x 36   (1) 4M x 36    (1) 1M x 36    (1) 256K x 36

     29MB        (1) 256K x   (1) 1M x 36    (1) 2M x 36     (1) 4M x 36
                    36

     30MB        (1) 512K x   (1) 1M x 36    (1) 2M x 36     (1) 4M x 36
                    36

     30MB       (1) 2M x 36   (1) 4M x 36     (1) 512K x     (1) 1M x 36
                                                  36

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

     32MB       (1) 2M x 36   (1) 4M x 36    (1) 2M x 36        NONE

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

     33MB       (1) 8M x 36    (1) 256K x        NONE           NONE
                                   36

     33MB       (1) 4M x 36   (1) 4M x 36     (1) 256K x        NONE
                                                  36

     33MB        (1) 256K x   (1) 4M x 36    (1) 4M x 36        NONE
                    36

     33MB       (1) 2M x 36   (1) 4M x 36    (1) 2M x 36    (1) 256K x 36

     33MB       (1) 2M x 36    (1) 256K x    (1) 2M x 36     (1) 4M x 36
                                   36

     34MB        (1) 256K x   (1) 8M x 36     (1) 256K x        NONE
                    36                            36

     34MB       (1) 4M x 36   (1) 4M x 36     (1) 256K x    (1) 256K x 36
                                                  36

     34MB        (1) 256K x    (1) 256K x    (1) 4M x 36     (1) 4M x 36
                    36             36

     35MB       (1) 8M x 36    (1) 256K x     (1) 512K x        NONE
                                   36             36

     35MB        (1) 512K x    (1) 256K x    (1) 8M x 36        NONE
                    36             36

     35MB        (1) 512K x   (1) 4M x 36    (1) 4M x 36    (1) 256K x 36
                    36

     35MB       (1) 4M x 36   (1) 4M x 36     (1) 512K x    (1) 256K x 36
                                                  36

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

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

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

     37MB       (1) 8M x 36   (1) 1M x 36     (1) 256K x        NONE
                                                  36

     37MB       (1) 8M x 36    (1) 256K x    (1) 1M x 36        NONE
                                   36

     37MB       (1) 4M x 36   (1) 4M x 36     (1) 256K x     (1) 1M x 36
                                                  36

     37MB       (1) 1M x 36    (1) 256K x    (1) 4M x 36     (1) 4M x 36
                                   36

     38MB       (1) 8M x 36   (1) 1M x 36     (1) 512K x        NONE
                                                  36

     38MB        (1) 512K x   (1) 1M x 36    (1) 8M x 36        NONE
                    36

     38MB        (1) 512K x   (1) 4M x 36    (1) 4M x 36     (1) 1M x 36
                    36

     38MB       (1) 4M x 36   (1) 4M x 36     (1) 512K x     (1) 1M x 36
                                                  36

     38MB       (1) 4M x 36    (1) 512K x    (1) 1M x 36     (1) 4M x 36
                                   36

                      DRAM CONFIGURATION (CONTINUED)

     Size         Bank 0         Bank 1         Bank 2         Bank 3

     39MB       (1) 8M x 36   (1) 1M x 36     (1) 512K x    (1) 256K x 36
                                                  36

     39MB        (1) 512K x    (1) 256K x    (1) 8M x 36     (1) 1M x 36
                    36             36

     40MB       (1) 8M x 36       NONE           NONE           NONE

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

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

     40MB       (1) 8M x 36   (1) 1M x 36    (1) 1M x 36        NONE

     40MB       (1) 1M x 36   (1) 1M x 36    (1) 8M x 36        NONE

     41MB       (1) 8M x 36    (1) 256K x    (1) 2M x 36        NONE
                                   36

     41MB       (1) 2M x 36    (1) 256K x    (1) 8M x 36        NONE
                                   36

     41MB       (1) 2M x 36   (1) 4M x 36    (1) 4M x 36    (1) 256K x 36

     41MB       (1) 4M x 36    (1) 256K x    (1) 2M x 36     (1) 4M x 36
                                   36

     42MB       (1) 2M x 36   (1) 4M x 36     (1) 512K x     (1) 4M x 36
                                                  36

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

     44MB       (1) 2M x 36   (1) 4M x 36    (1) 4M x 36     (1) 1M x 36

     44MB       (1) 4M x 36   (1) 1M x 36    (1) 2M x 36     (1) 4M x 36

     45MB       (1) 8M x 36    (1) 256K x    (1) 2M x 36     (1) 1M x 36
                                   36

     45MB       (1) 2M x 36   (1) 1M x 36    (1) 8M x 36    (1) 256K x 36

     48MB       (1) 4M x 36   (1) 4M x 36    (1) 4M x 36        NONE

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

     48MB       (1) 8M x 36   (1) 1M x 36    (1) 2M x 36     (1) 1M x 36

     49MB       (1) 4M x 36   (1) 4M x 36    (1) 4M x 36    (1) 256K x 36

     49MB        (1) 256K x   (1) 4M x 36    (1) 4M x 36     (1) 4M x 36
                    36

     49MB       (1) 8M x 36   (1) 4M x 36     (1) 256K x        NONE
                                                  36

     49MB       (1) 8M x 36    (1) 256K x    (1) 4M x 36        NONE
                                   36

     50MB       (1) 8M x 36   (1) 4M x 36     (1) 512K x        NONE
                                                  36

     50MB        (1) 512K x   (1) 4M x 36    (1) 8M x 36        NONE
                    36

     50MB        (1) 512K x   (1) 4M x 36    (1) 4M x 36     (1) 4M x 36
                    36

     50MB       (1) 4M x 36   (1) 4M x 36     (1) 512K x     (1) 4M x 36
                                                  36

     51MB       (1) 8M x 36   (1) 4M x 36     (1) 512K x    (1) 256K x 36
                                                  36

     51MB        (1) 512K x    (1) 256K x    (1) 8M x 36     (1) 4M x 36
                    36             36

     52MB       (1) 8M x 36   (1) 4M x 36    (1) 1M x 36        NONE

     52MB       (1) 4M x 36   (1) 1M x 36    (1) 8M x 36        NONE

     53MB       (1) 8M x 36   (1) 4M x 36    (1) 1M x 36    (1) 256K x 36

     53MB       (1) 8M x 36   (1) 1M x 36     (1) 256K x     (1) 4M x 36
                                                  36

     54MB       (1) 8M x 36   (1) 1M x 36     (1) 512K x     (1) 4M x 36
                                                  36

     54MB        (1) 512K x   (1) 4M x 36    (1) 8M x 36     (1) 1M x 36
                    36

     56MB       (1) 8M x 36   (1) 1M x 36    (1) 1M x 36     (1) 4M x 36

     56MB       (1) 1M x 36   (1) 1M x 36    (1) 8M x 36     (1) 4M x 36

     56MB       (1) 8M x 36   (1) 4M x 36    (1) 2M x 26        NONE

     56MB       (1) 2M x 26   (1) 4M x 36    (1) 8M x 36        NONE

     57MB       (1) 8M x 36    (1) 256K x    (1) 2M x 26     (1) 4M x 36
                                   36

     57MB       (1) 2M x 26   (1) 4M x 36    (1) 8M x 36    (1) 256K x 36

                      DRAM CONFIGURATION (CONTINUED)

     Size          Bank 0         Bank 1        Bank 2          Bank 3

     64MB       (1) 4M x 36    (1) 4M x 36    (1) 4M x 36    (1) 4M x 36

     64MB       (1) 8M x 36    (1) 4M x 36    (1) 4M x 36        NONE

     64MB       (1) 4M x 36    (1) 4M x 36    (1) 8M x 36        NONE

  Note:For CPU cards that only support 32MB of RAM, use bank 0 and bank 1
  only. Double-sided SIMMs can only be installed in bank 2 and bank 3.

DIGITAL SCIENTIFIC RESEARCH, INC.

ISPB-12T

Processor         Dependant on external CPU card installed.
Processor Speed   Dependant on external CPU card installed.
Chip Set          Dependant on external CPU card installed.
Max. Onboard DRAM Dependant on external CPU card installed.
Cache             Dependant on external CPU card installed.
BIOS              Dependant on external CPU card installed.
I/O Options       None
NPU Options       Dependant on external CPU card installed.

[Image]

Processor             Dependant on CPU card installed.
Processor Speed       Dependant on CPU card installed.
Chip Set              ACC
Max. Onboard DRAM     32MB
Cache                 None
BIOS                  Dependant on CPU card installed.
I/O Options           Proprietary external CPU card slot, bus mouse port,
                      parallel port,serial ports (2)
NPU Options           None

[Image]

                                CONNECTIONS

  Purpose               Location      Purpose                  Location

  Serial port 1            CN1        External battery            J6

  Power LED &              J1         Parallel port               J7
  keylock

  Reset switch             J2         Serial port 2               J8

  Turbo switch             J3         PS/2 mouse                  JP1

  Turbo LED                J4         External keyboard           J9
                                      connector

  Speaker                  J5         Proprietary external     SL1, SL2
                                      CPU slots

                        USER CONFIGURABLE SETTINGS

             Function                  Jumper/Switch         Position

     LPT interrupt select IRQ7             JP2              pins 1 & 2
                                                              closed

      LPT interrupt select IRQ5             JP2              pins 3 & 4
                                                              closed

     Serial port 2 interrupt               JP3              pins 1 & 2
      select IRQ4                                             closed

      Serial port 2 interrupt               JP3              pins 3 & 4
      select IRQ3                                             closed

     Serial port 1 interrupt               JP4              pins 3 & 4
      select IRQ3                                             closed

      Serial port 1 interrupt               JP4              pins 1 & 2
      select IRQ4                                             closed

                        SERIAL PORT 1 CONFIGURATION

                 Port 1                                 JP7

                    COM1                        pins 1 & 2 closed

                     COM2                        pins 3 & 4 closed

                     COM3                        pins 5 & 6 closed

                     COM4                        pins 7 & 8 closed

                   Disabled                     pins 9 & 10 closed

                        SERIAL PORT 2 CONFIGURATION

                 Port 2                                 JP6

                    COM2                        pins 3 & 4 closed

                     COM1                        pins 1 & 2 closed

                     COM3                        pins 5 & 6 closed

                     COM4                        pins 7 & 8 closed

                   Disabled                     pins 9 & 10 closed

                        PARALLEL PORT CONFIGURATION

                   LPT                                  JP5

                    LPT1                        pins 1 & 2 closed

                     LPT2                        pins 3 & 4 closed

                   Disabled                      pins 5 & 6 closed

              DRAM CONFIGURATION

      Size          Bank 0          Bank 1

      1MB         (4) 256K x 9       NONE

      2MB         (4) 256K x 9   (4) 256K x 9

      4MB         (4) 1M x 9         NONE

      5MB         (4) 256K x 9    (4) 1M x 9

      8MB         (4) 1M x 9      (4) 1M x 9

      16MB        (4) 4M x 9         NONE

      32MB        (4) 4M x 9      (4) 4M x 9

Processor         80386DX
Processor Speed   25/33/40MHz
Chip Set          ACC
Max. Onboard DRAM 64MB
Cache             64/256KB
BIOS              AMI
NPU Options       None

[Image]

                 CONNECTIONS

        Purpose               Location

  CPU card connectors         CN1, CN2

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Factory configured - do not             JP1              N/A
      alter

     Factory configured - do not             JP4              N/A
      alter

     Factory configured - do not             JP5              N/A
      alter

     Factory configured - do not             JP7              N/A
      alter

  Note:Jumpers located on this card are BIOS controlled and should not be
  altered.

            CACHE CONFIGURATION

     Size          Bank 0          TAG

     64KB        (8) 8K x 8    (1) 8K x 8

     256KB       (8) 32K x 8   (1) 32K x 8

Processor         80386SX
Processor Speed   25/33MHz
Chip Set          ACC
Max. Onboard DRAM 32MB
Cache             64/256KB
BIOS              AMI
NPU Options       80387SX

[Image]

                  CONNECTIONS

        Purpose                Location

  PS/2 mouse connector            J3

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Monitor type select monochrome          JP1           pins 1 & 2
                                                              closed

      Monitor type select color               JP1           pins 2 & 3
                                                              closed

     IRQ 12 enabled                          JP3             Closed

      IRQ 12 disabled                         JP3              Open

Processor         80386SX
Processor Speed   25/33MHz
Chip Set          OPTi
Max. Onboard DRAM 16MB
Cache             None
BIOS              AMI
NPU Options       80387SX

[Image]

                  CONNECTIONS

        Purpose                Location

  PS/2 mouse connector            J1

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Monitor type select monochrome          JP2           pins 1 & 2
                                                              closed

      Monitor type select color               JP2           pins 2 & 3
                                                              closed

     IRQ 12 enabled                          JP3             Closed

      IRQ 12 disabled                         JP3              Open

                       MISCELLANEOUS TECHNICAL NOTES

  Note:Model IA386S-P/XX can support 32 MB of memory and uses ACC
  chipset.

  Model IO386S-P/XX can support 16 MB of memory and uses either OPTI or
  ATMEL chipset.

Processor         80386DX
Processor Speed   33/40MHz
Chip Set          OPTi or ATMEL
Max. Onboard DRAM 64MB
Cache             64/256KB
BIOS              AMI/(MR BIOS is optional)
Dimensions        220mm x 220mm
NPU Options       80387/3167

[Image]

                 CONNECTIONS

        Purpose               Location

  CPU card connectors         CN1, CN2

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Factory configured - do not             JP1              N/A
      alter

  Note:This jumper may not be on all CPU cards.

            CACHE CONFIGURATION

     Size          Bank 0          TAG

     64KB        (8) 8K x 8    (1) 8K x 8

     256KB       (8) 32K x 8   (1) 32K x 8

Processor        80486SX/80486DX/80486DX2
Processor Speed  20/25/33/50(internal)/66(internal)MHz
Chip Set         ACC
Max. Onboard DRAM64MB
Cache            64/256KB
BIOS             AMI
I/O Options      None
NPU Options      None

[Image]

              CONNECTIONS

  Purpose                    Location

  CPU card connectors        CN1, CN2

                        USER CONFIGURABLE SETTINGS

              Function                  Jumper/Switch        Position

     Factory configured - do not            J3                 N/A
      alter

     Factory configured - do not           JP12                N/A
      alter

      PS/2 mouse enable                     JP33              Closed

      PS/2 mouse disable                    JP33               Open

                          CPU TYPE CONFIGURATION

          Type                      JP2                     JP3

         80486SX             pins 2 & 3 closed              Open

         80486DX             pins 1 & 2, 3 & 4       pins 3 & 4 closed
                                  closed

        80486DX2             pins 1 & 2, 3 & 4       pins 1 & 2 closed
                                  closed

  CPU SPEED CONFIGURATION

    Speed           S0

    25MHz         Closed

    33MHz          Open

    50iMHz        Closed

    66iMHz         Open

                    CACHE CONFIGURATION

     Size          Bank 0         Bank 1          TAG

     64KB        (4) 8K x 8     (4) 8K x 8    (1) 8K x 8

     256KB      (4) 32K x 8    (4) 32K x 8    (1) 32K x 8

