
ALPHA MICROSYSTEMS

AM-190

Processor                  Motorola 68040
Processor Speed            66MHz
Chip Set                   Unidentified
Video Chip Set             None
Maximum Onboard Memory     128MB
Maximum Video Memory       None
Cache                      128KB
BIOS                       Unidentified
Dimensions                 330mm x 218mm
I/O Options                Floppy drive interface, SCSI interface, serial
                           ports (2), VME bus connectors (2), I/O bus
                           connectors (2), UPS switch contact port,
                           Ethernet LEDs (3), Memory configuration LED,
                           AM-191 boot module slot, AUI port
NPU Options                None

[Image]

                                CONNECTIONS

  Purpose                  Location     Purpose                  Location

  VME bus connector           CN1       I/O bus connector          J7

  VME bus connector           CN2       I/O bus connector          J8

  Serial port 1               J1        Floppy drive interface     J10

  Serial port 2               J2        +5v chassis fan power      JX1

  UPS switch contact          J3        +12v chassis fan power     JX2
  port

  AUI port                    J4        +5v chassis fan power      JY1

  Front panel connector       J5        +12v chassis fan power     JY2

  SCSI interface              J6        AM-191 boot module         SL1
                                        slot

                        USER CONFIGURABLE SETTINGS

               Function                      Label           Position

     Remote reset disabled                   W7               Open

      Remote reset enabled                    W7              Closed

     Timeout clock source select             W8             Pins 2 & 3
      1MHz                                                    closed

      Timeout clock source select             W8             Pins 1 & 2
      500KHz                                                  closed

     Factory configured - do not             W9              Closed
      alter

     Factory configured - do not             W11             Closed
      alter

     Factory configured - do not             W12             Closed
      alter

     Ethernet sonic chip select 1/2          W13            Pins 1 & 2
      BCLK                                                    closed

      Ethernet sonic chip select 1            W13            Pins 2 & 3
      BCLK                                                    closed

     Factory configured - do not             W15             Closed
      alter

     MMU enabled                        W16/pins 1 & 2        Open

      MMU disabled                       W16/pins 1 & 2       Closed

     Factory configured - do not             W18              Open
      alter

     Factory configured - do not             W19             Closed
      alter

     80486 VPC disabled                      W20              Open

      80486 VPC enabled                       W20             Closed

                           DRAM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2        Bank 3

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

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

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

     16MB       (1) 4M x 36       None           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

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

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

                        DRAM CONFIGURATION (CON'T)

     Size          Bank 0         Bank 1        Bank 2         Bank 3

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

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

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

     40MB        (1) 8M x 36    (1) 1M x 36   (1) 1M x 36       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) 4M x 36   (1) 4M x 36       None

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

     64MB        (1) 8M x 36    (1) 8M x 36      None           None

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

     80MB        (1) 8M x 36    (1) 4M x 36   (1) 4M x 36    (1) 4M x 36

     96MB        (1) 8M x 36    (1) 8M x 36   (1) 8M x 36       None

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

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

  Note: The location of banks 0, 1, 2 & 3 are unidentified. Do not
  install SIMM in SL1.

                            CACHE CONFIGURATION

  Note: Board is factory installed with 128KB cache. The location is
  unidentified.

  CACHE JUMPER CONFIGURATION (80486 CACHE)

       Setting                  W14

       Enabled                Closed

       Disabled                Open

  CACHE JUMPER CONFIGURATION (68040 CACHE)

       Setting            W16/pins 3 & 4

       Enabled                 Open

       Disabled               Closed

                          SERIAL PORT 1 SELECTION

       Setting              W1                W3                W5

         RS232          Pins 2 & 3       Pins 2 & 3         Pins 2 & 3
                          closed            closed            closed

          RS422          Pins 1 & 2       Pins 1 & 2         Pins 1 & 2
                          closed            closed            closed

                          SERIAL PORT 2 SELECTION

       Setting              W2                W4                W6

         RS232          Pins 2 & 3       Pins 2 & 3         Pins 2 & 3
                          closed            closed            closed

          RS422          Pins 1 & 2       Pins 1 & 2         Pins 1 & 2
                          closed            closed            closed

                            MAIN BOOT SELECTION

    Setting          SW1/5         SW1/6          SW1/7         SW1/8

     Floppy           Off           Off            Off           Off

    SCSI disk         Off           Off            Off            On
     drive

     AM-520           Off            On            Off           Off

                         ALTERNATE BOOT SELECTION

       Setting           SW1/1        SW1/2        SW1/3         SW1/4

        None              Off          Off          Off           Off

       Floppy             Off          Off          Off           On

         VCR              Off          Off           On           On

  SCSI streamer/DAT       Off          On            On           Off

   AM-640 MagTape         Off          On           Off           Off

                        SCSI TERMINATION SELECTION

                 Setting                                 W10

          SCSI termination enabled               Pins 2 & 3 closed

           SCSI termination disabled              Pins 1 & 2 closed

                   DIAGNOSTIC LED(S)

  Note: Function of LEDs (CN3-CN6) are unidentified.

