
COMPAQ COMPUTER CORPORATION

PORTABLE III

Processor              80286 (exact location unidentified)
Processor Speed        8/12MHz
Chip Set               Unidentified
Max. Onboard DRAM      6MB (4MB on external memory card)
Cache                  None
BIOS                   Unidentified
Dimensions             330mm x 218mm
I/O Options            IDE interface, external memory card slot, floppy
                       drive interface, parallel port, serial port, VGA
                       port, display connector
NPU Options            80287 (exact location unidentified)

[Image]

                                CONNECTIONS

  Purpose                  Location     Purpose                 Location

  Parallel port               CN1       External Memory card       CN5
                                        slot

  VGA port                    CN2       IDE interface              CN6

  Serial port                 CN3       Floppy drive               CN7
                                        interface

  Display controller          CN4

                        USER CONFIGURABLE SETTINGS

              Function                 Jumper/Switch         Position

     Hard drive enabled                   CN8/5                On

      Hard drive disabled                  CN8/5                Off

     CPU speed select 8MHz                CN8/6                On

      CPU speed select 12MHz               CN8/6                Off

     Video type select boots              CN8/7                On
      plasma display in color mode

      Video type select boots              CN8/7                Off
      plasma display in monochrome
      mode

     Factory configured - do not          CN8/8                Off
      alter

     CPU access speed select 8/12           E1              pins 1 & 2
                                                              closed

      CPU access speed select 8              E1              pins 2 & 3
                                                              closed

     Factory configured - do not            E2                 N/A
      alter

     Printer port enabled                   E7              pins 2 & 3
                                                              closed

      Printer port disabled                  E7              pins 1 & 2
                                                              closed

     Controller address select              E8           pins 1 & 2, 4 &
      primary                                                5 closed

      Controller address select              E8           pins 2 & 3, 4 &
      secondary                                              5 closed

     System ROM select 16KB                E10              pins 1 & 2
                                                              closed

      System ROM select 32KB                E10              pins 2 & 3
                                                              closed

     ROM Set2 enabled                      E12              pins 1 & 2
                                                              closed

      ROM Set2 disabled                     E12              pins 2 & 3
                                                              closed

              DRAM CONFIGURATION

      Size          Bank 0          Bank 1

     256KB        (1) 256K x 9       NONE

     512KB        (1) 256K x 9   (1) 256K x 9

      1MB         (1) 1M x 9         NONE

     1.5MB        (1) 1M x 9     (1) 256K x 9

      2MB         (1) 1M x 9      (1) 1M x 9

          COM/IRQ CONFIGURATION

       COM/IRQ              E5/E16

  COM1/IRQ4 Serial    pins 2 & 4 closed

   COM1/IRQ4 Modem    pins 3 & 4 closed

  COM2/IRQ3 Serial    pins 1 & 2 closed

   COM2/IRQ3 Modem    pins 1 & 3 closed

        SERIAL PORT CONFIGURATION

      COM port              E3/E4

     COM1 Serial      pins 1 & 2 closed

     COM1 Modem       pins 1 & 3 closed

     COM2 Serial      pins 1 & 3 closed

     COM2 Modem       pins 3 & 4 closed

  DRAM BASE MEMORY SWITCH CONFIGURATION

     Size         CN8/1         CN8/2

     None          On            On

    256KB          On            Off

    512KB          Off           On

    640KB          Off           Off

                 DRAM EXTENDED MEMORY SWITCH CONFIGURATION

    Base memory     Extended memory     CN8 Switch 3       CN8 Switch 4

       640KB             256KB               On                Off

       640KB              1MB                Off                On

                DRAM BANK CONFIGURATION

            Bank                        E17

            None             pins 2 & 3, 4 & 5 closed

           Bank 1            pins 2 & 3, 5 & 6 closed

         Bank 1 & 2          pins 1 & 2, 4 & 5 closed

       Bank 1, 2, & 3        pins 1 & 2, 5 & 6 closed

[Image]

                      DRAM CONFIGURATION

      Size          Bank 0          Bank 1          Bank 2

     512KB       (2) 256K x 9        NONE            NONE

      1MB        (2) 256K x 9    (2) 256K x 9        NONE

     1.5MB       (2) 256K x 9    (2) 256K x 9    (2) 256K x 9

      2MB         (2) 1M x 9         NONE            NONE

      4MB         (2) 1M x 9      (2) 1M x 9         NONE

      6MB         (2) 1M x 9      (2) 1M x 9      (2) 1M x 9

            DRAM CONFIGURATION

        Size                  S1

      256K x 9        pins 1 & 2 closed

       1M x 9         pins 2 & 3 closed

