DIGITAL EQUIPMENT CORPORATION

PERSONAL WORKSTATION 266I

Device Type                Mainboard
Processor                  Pentium II
Processor Speed            233/266/300/333MHz
Chip Set                   Intel
Video Chip Set             None
Maximum Onboard Memory     512MB (EDO supported)
Maximum Video Memory       None
Cache                      128KB (located on Pentium II CPU)
BIOS                       Unidentified
Dimensions                 254mm x 218mm
I/O Options (CPU)          Parallel port, PS/2 mouse port, serial ports
                           (2), USB connectors (2)
I/O Options (backplane)    IDE interfaces (2), floppy drive interface,
                           100Base-T connector, game/MIDI port, audio in –
                           CD-ROM, fax/modem connector, 32-bit PCI slots
                           (4)
NPU Options                None

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Serial port                 CN1      USB connector 2             CN4

  Serial port                 CN2      PS/2 mouse port             CN5

  USB connector 1             CN3      Parallel port               CN6

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

  »   Boot block update disabled              J27           Pins 1 & 2
                                                              closed

      Boot block update enabled               J27           Pins 2 & 3
                                                              closed

  »   Password disabled                      SW1/5             Off

      Password enabled                       SW1/5              On

  »   BIOS normal operation                  SW1/6             Off

      BIOS recovery mode                     SW1/6              On

  »   CMOS memory normal operation           SW1/7             Off

      CMOS memory clear                      SW1/7              On

                            SIMM CONFIGURATION

     Size          Bank 0         Bank 1         Bank 2         Bank 3

     16MB        (2) 2M x 36       None           None           None

     32MB        (2) 4M x 36       None           None           None

     32MB        (2) 2M x 36   (2) 2M x 36        None           None

     48MB        (2) 4M x 36   (2) 2M x 36        None           None

     48MB        (2) 2M x 36   (2) 2M x 36    (2) 2M x 36        None

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

     64MB        (2) 8M x 36       None           None           None

     64MB        (2) 4M x 36   (2) 4M x 36        None           None

     80MB        (2) 8M x 36   (2) 2M x 36        None           None

     96MB        (2) 8M x 36   (2) 4M x 36        None           None

     96MB        (2) 4M x 36   (2) 4M x 36    (2) 4M x 36        None

     128MB       (2) 16M x 36      None           None           None

     128MB       (2) 8M x 36   (2) 8M x 36        None           None

     128MB       (2) 4M x 36   (2) 4M x 36    (2) 4M x 36    (2) 4M x 36

     144MB       (2) 16M x 36  (2) 2M x 36        None           None

     160MB       (2) 16M x 36  (2) 4M x 36        None           None

                        SIMM CONFIGURATION (CON’T)

     Size          Bank 0         Bank 1         Bank 2         Bank 3

     176MB       (2) 16M x 36  (2) 2M x 36    (2) 2M x 36    (2) 2M x 36

     192MB       (2) 16M x 36  (2) 8M x 36        None           None

     192MB       (2) 8M x 36   (2) 8M x 36    (2) 8M x 36        None

     224MB       (2) 16M x 36  (2) 4M x 36    (2) 4M x 36    (2) 4M x 36

     256MB       (2) 16M x 36  (2) 16M x 36       None           None

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

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

     320MB       (2) 16M x 36  (2) 16M x 36   (2) 4M x 36    (2) 4M x 36

     320MB       (2) 16M x 36  (2) 8M x 36    (2) 8M x 36    (2) 8M x 36

     384MB       (2) 16M x 36  (2) 16M x 36   (2) 16M x 36       None

     512MB       (2) 16M x 36  (2) 16M x 36   (2) 16M x 36   (2) 16M x 36

  Note: Board accepts EDO memory.

                  CACHE CONFIGURATION

  Note: 128KB cache is located on the Pentium II CPU.

                            CPU SPEED SELECTION

    CPU     Clock    Multiplier   SW1/1    SW1/2   SW1/3   SW1/4   SW1/8
  speed     speed

  233MHz    66MHz       3.5x       On      Off     Off      On       On

  266MHz    66MHz        4x        On       On      On      Off      On

  300MHz    66MHz       4.5x       On      Off      On      Off      On

  333MHz    66MHz        5x        On       On     Off      Off      On

[Image]

                                CONNECTIONS

  Purpose                  Location     Purpose                Location

  Main logic board           CN1        Control panel            CN11
  connectors                            connector

  IDE interface 1            CN2        Audio in – CD-ROM        CN12

  IDE interface 2            CN3        Fax/modem connector      CN13

  Floppy drive               CN4        Audio connector          CN14
  interface

  100Base-T connector        CN5        Power connector           P1

  IDE interface LED          CN6        5v power                  P2

  10Base-T connector         CN7        3.3v power                P3

  Chassis fan power          CN8        32-bit PCI slots       PC1 – PC2

  Chassis fan power          CN9        32-bit PCI slots       SL1 & SL2
                                        (full size)

  Game/MIDI port             CN10