
DIGITAL EQUIPMENT CORPORATION

ALPHASERVER 300

Device Type                Mainboard
Processor                  Alpha
Processor Speed            266MHz
Chip Set                   Unidentified
Maximum Onboard Memory     512MB
Cache                      2MB
BIOS                       Unidentified
Dimensions                 254mm x 218mm
I/O Options                Floppy drive interface, SCSI interfaces (2),
                           parallel port, PS/2 mouse port, serial ports
                           (2), riser slot

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Service LED                 CN1      Serial port                 CN6

  Service LED                 CN2      PS/2 mouse port             CN7

  SCSI interface              CN3      SCSI interface              CN8

  Parallel port               CN4      Floppy drive interface      CN9

  Serial port                 CN5      Riser slot                  SL1

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

     Console select main console              J1           Pins 2 & 3
                                                              closed

      Console select mini console              J1           Pins 1 & 2
                                                              closed

     Boot up from flash BIOS                  J2           Pins 2 & 3
                                                              closed

      Boot up from floppy                      J2           Pins 1 & 2
                                                              closed

     Reset switch select reset                J3           Pins 1 & 2
                                                              closed

      Reset switch select halt                 J3           Pins 2 & 3
      interrupt request                                       closed

     Flash BIOS write protect disabled        J4           Pins 1 & 2
                                                              closed

      Flash BIOS write protect enabled         J4           Pins 2 & 3
                                                              closed

     Factory configured - do not alter       J21              Open

     External SCSI cable sensing             J27              Open
      enabled

      External SCSI cable sensing             J27             Closed
      disabled

              SIMM CONFIGURATION

      Size          Bank 0          Bank 1

      16MB        (4) 1M x 36        None

      32MB        (4) 1M x 36    (4) 1M x 36

      32MB        (4) 2M x 36        None

      48MB        (4) 2M x 36    (4) 1M x 36

      64MB        (4) 2M x 36    (4) 2M x 36

      64MB        (4) 4M x 36        None

      80MB        (4) 4M x 36    (4) 1M x 36

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

     128MB        (4) 4M x 36    (4) 4M x 36

     128MB        (4) 8M x 36        None

     160MB        (4) 8M x 36    (4) 2M x 36

     192MB        (4) 8M x 36    (4) 4M x 36

     256MB        (4) 8M x 36    (4) 8M x 36

     256MB        (4) 16M x 36       None

     272MB        (4) 16M x 36   (4) 1M x 36

     288MB        (4) 16M x 36   (4) 2M x 36

     320MB        (4) 16M x 36   (4) 4M x 36

     384MB        (4) 16M x 36   (4) 8M x 36

     512MB        (4) 16M x 36   (4) 16M x 36

                 CACHE CONFIGURATION

  Note: The location of the cache is unidentified.

                     CPU SPEED SELECTION

        Speed                 J7                  J32

        266Hz          Pins 1 & 2 closed   Pins 1 & 2 closed

                            I/O CHIP SELECTION

           Type                      J25                     J26

            87332                  Closed                 Closed

             87312                   Open                   Open

