
COMPAQ COMPUTER CORPORATION

PRESARIO CDS 774/972/974/982/992

PRESARIO CDTV 978

Processor              Pentium
Processor Speed        75/90/100MHz
Chip Set               Unidentified
Max. Onboard DRAM      136MB
Cache                  256KB
BIOS                   Unidentified
Dimensions             330mm x 218mm
I/O Options            Parallel port, PS/2 mouse port, serial ports (2),
                       VGA feature connector, VGA port, modem port, CD-ROM
                       audio connector, modem audio connector, video
                       memory interface
NPU Options            None

[Image]

                                CONNECTIONS

  Purpose                  Location   Purpose                    Location

  VGA port                   CN1      Video memory connector     J4, J12

  PS/2 mouse port            CN2      External battery             J5

  Keyboard port              CN3      Modem audio connector        J7

  Modem port                 CN4      CD-ROM audio connector       J10

  Modem port                 CN5      Serial port 2                J14

  Serial port 1              CN6      VGA feature connector        J20

  Parallel port              CN7

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     Factory configured - do not             J16              N/A
      alter

     CMOS memory normal operation             P2             Closed

      CMOS memory clear                        P2              Open

     Password enabled                         P3           pins 1 & 2
                                                              closed

      Password disabled                        P3           pins 2 & 3
                                                              closed

     CPU core to bus ratio speed             P11           pins 1 & 2
      select 1.5x                                             closed

      CPU core to bus ratio speed             P11           pins 2 & 3
      select 2x                                               closed

                    DRAM CONFIGURATION (75MHZ CPU ONLY)

       Size             Bank 0A            Bank 0             Bank 1

       20MB               12MB           (2) 1M x 36           NONE

       28MB               12MB           (2) 1M x 36       (2) 1M x 36

       28MB               12MB           (2) 2M x 36           NONE

       36MB               12MB           (2) 1M x 36       (2) 2M x 36

       36MB               12MB           (2) 2M x 36       (2) 1M x 36

       44MB               12MB           (2) 2M x 36       (2) 2M x 36

       44MB               12MB           (2) 4M x 36           NONE

       52MB               12MB           (2) 1M x 36       (2) 4M x 36

       52MB               12MB           (2) 4M x 36       (2) 1M x 36

       60MB               12MB           (2) 2M x 36       (2) 4M x 36

       60MB               12MB           (2) 4M x 36       (2) 2M x 36

       76MB               12MB           (2) 4M x 36       (2) 4M x 36

       76MB               12MB           (2) 8M x 36           NONE

       84MB               12MB           (2) 1M x 36       (2) 8M x 36

       84MB               12MB           (2) 8M x 36       (2) 1M x 36

       92MB               12MB           (2) 2M x 36       (2) 8M x 36

       92MB               12MB           (2) 8M x 36       (2) 2M x 36

       108MB              12MB           (2) 4M x 36       (2) 8M x 36

       108MB              12MB           (2) 8M x 36       (2) 4M x 36

       136MB              12MB           (2) 8M x 36       (2) 8M x 36

  Note: Bank 0A is factory installed and is not configurable. Only 8MB of
  the onboard memory is used when 136MB is installed.

        DRAM CONFIGURATION (75MHZ & 90MHZ CPU ONLY)

     Size         Bank 0A         Bank 0        Bank 1

     16MB           8MB        (2) 1M x 36       NONE

     24MB           8MB        (2) 1M x 36    (2) 1M x 36

     24MB           8MB        (2) 2M x 36       NONE

     32MB           8MB        (2) 1M x 36    (2) 2M x 36

     32MB           8MB        (2) 2M x 36    (2) 1M x 36

     40MB           8MB        (2) 2M x 36    (2) 2M x 36

     40MB           8MB        (2) 4M x 36       NONE

     48MB           8MB        (2) 1M x 36    (2) 4M x 36

     48MB           8MB        (2) 4M x 36    (2) 1M x 36

       DRAM CONFIGURATION (75MHZ & 90MHZ CPU ONLY CONT)

      Size          Bank 0A          Bank 0          Bank 1

      56MB            8MB         (2) 2M x 36     (2) 4M x 36

      56MB            8MB         (2) 4M x 36     (2) 2M x 36

      72MB            8MB         (2) 4M x 36     (2) 4M x 36

      72MB            8MB         (2) 8M x 36         NONE

      80MB            8MB         (2) 1M x 36     (2) 8M x 36

      80MB            8MB         (2) 8M x 36     (2) 1M x 36

      88MB            8MB         (2) 2M x 36     (2) 8M x 36

      88MB            8MB         (2) 8M x 36     (2) 2M x 36

     104MB            8MB         (2) 4M x 36     (2) 8M x 36

     104MB            8MB         (2) 8M x 36     (2) 4M x 36

     136MB            8MB         (2) 8M x 36     (2) 8M x 36

  Note: Bank 0A is factory installed and is not configurable.

                   DRAM CONFIGURATION (100MHZ CPU ONLY)

       Size             Bank 0A            Bank 0             Bank 1

       24MB               16MB           (2) 1M x 36           NONE

       32MB               16MB           (2) 1M x 36       (2) 1M x 36

       32MB               16MB           (2) 2M x 36           NONE

       40MB               16MB           (2) 1M x 36       (2) 2M x 36

       40MB               16MB           (2) 2M x 36       (2) 1M x 36

       48MB               16MB           (2) 2M x 36       (2) 2M x 36

       48MB               16MB           (2) 4M x 36           NONE

       56MB               16MB           (2) 1M x 36       (2) 4M x 36

       56MB               16MB           (2) 4M x 36       (2) 1M x 36

       64MB               16MB           (2) 2M x 36       (2) 4M x 36

       64MB               16MB           (2) 4M x 36       (2) 2M x 36

       80MB               16MB           (2) 4M x 36       (2) 4M x 36

       80MB               16MB           (2) 8M x 36           NONE

       88MB               16MB           (2) 1M x 36       (2) 8M x 36

       88MB               16MB           (2) 8M x 36       (2) 1M x 36

       96MB               16MB           (2) 2M x 36       (2) 8M x 36

       96MB               16MB           (2) 8M x 36       (2) 2M x 36

       112MB              16MB           (2) 4M x 36       (2) 8M x 36

       112MB              16MB           (2) 8M x 36       (2) 4M x 36

       136MB              16MB           (2) 8M x 36       (2) 8M x 36

  Note: Bank 0A is factory installed and is not configurable. Only 8MB of
  the onboard memory is used when 136MB is installed.

                            CACHE CONFIGURATION

  Note: This board is factory installed with 256KB. It is not
  configurable.

       CPU BUS SPEED CONFIGURATION

        Speed                 P5

        50MHz         pins 2 & 3 closed

        60MHz         pins 1 & 2 closed

                        VIDEO MEMORY CONFIGURATION

  Note: To upgrade video memory, install video module on jumpers J4 &
  J12.

