
COMPAQ COMPUTER CORPORATION

DESKPRO 4000N, 4000S

Device Type                Mainboard
Processor                  Pentium MMX
Processor Speed            166/200/233MHz
Chip Set                   VIA
Video Chip Set             S3
Maximum Onboard Memory     256MB (SDRAM supported)
Maximum Video Memory       2MB
Cache                      256KB
BIOS                       Unidentified
Dimensions                 254mm x 218mm
I/O Options                Ethernet AUI connector, Ethernet 10BaseT
                           connector, floppy drive interface, IDE
                           interface, parallel port, PS/2 mouse port,
                           serial ports (2), VGA port, riser slot, USB
                           connectors (2), ATX power connector, CD-ROM
                           interface, LS-120 connector
NPU Options                None

[Image]

                                CONNECTIONS

  Purpose                Location      Purpose                Location

  ATX power                 ATX        Floppy drive              J1
  connector                            interface

  VGA port                  CN1        Audio connector           J11

  PS/2 mouse port           CN2        External battery      P14/pins 9 -
                                                                 12

  Ethernet AUI              CN3        Ethernet AUI              P15
  connector                            connector

  Ethernet 10BaseT          CN4        Power cable/LED           P16
  connector                            connector

  Serial port               CN5        IDE interface 1           P20

  Serial port               CN6        LS-120 connector          P21

  Parallel port             CN7        CD-ROM interface          P25

  USB connector             CN8        Riser slot                SL1

  USB connector             CN9

                        USER CONFIGURABLE SETTINGS

               Function                      Label           Position

     CMOS memory normal operation       P14/pins 1 & 2       Closed

      CMOS memory clear                  P14/pins 1 & 2        Open

      Password enabled                       SW1/1              Off

      Password disabled                      SW1/1              On

              DIMM CONFIGURATION

      Size          Bank 0          Bank 1

      8MB         (1) 1M x 64        None

      16MB        (1) 2M x 64        None

      16MB        (1) 1M x 64    (1) 1M x 64

      24MB        (1) 2M x 64    (1) 1M x 64

      32MB        (1) 4M x 64        None

      32MB        (1) 2M x 64    (1) 2M x 64

      40MB        (1) 4M x 64    (1) 1M x 64

      48MB        (1) 4M x 64    (1) 2M x 64

      64MB        (1) 8M x 64        None

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

      72MB        (1) 8M x 64    (1) 1M x 64

      80MB        (1) 8M x 64    (1) 2M x 64

      96MB        (1) 8M x 64    (1) 4M x 64

     128MB        (1) 16M x 64       None

     128MB        (1) 8M x 64    (1) 8M x 64

           DIMM CONFIGURATION (CONT)

      Size          Bank 0          Bank 1

     136MB       (1) 16M x 64     (1) 1M x 64

     144MB       (1) 16M x 64     (1) 2M x 64

     160MB       (1) 16M x 64     (1) 4M x 64

     192MB       (1) 16M x 64     (1) 8M x 64

     256MB       (1) 16M x 64    (1) 16M x 64

            Note: Board accepts SDRAM memory.

                 CACHE CONFIGURATION

  Note: The location of the cache is unidentified.

                 VIDEO MEMORY CONFIGURATION

  Note: The location of the video memory is unidentified.

                            CPU SPEED SELECTION

    CPU     Clock    Multiplier   SW1/2    SW1/3   SW1/4   SW1/5   SW1/6
  speed     speed

  166MHz    66MHz       2.5x       On       On     Off      On      Off

  200MHz    66MHz        3x        Off      On     Off      On      Off

  233MHz    66MHz       3.5x       Off     Off     Off      On      Off

