Amstrad PC - ALT386 Laptop DIP Switches

To the right of the serial mouse connector, a set of dip switches with the following functions:

 

 

    ALT DIP switch settings (Bank A):

  1. Sw1=Off, Sw2=On, Sw3=On 512K memory
  2. Sw1=On, Sw2=Off, Sw3=On 1MB memory (default)
  3. Sw1=Off, Sw2=On, Sw3=Off 2MB memory
  4. Sw1=On, Sw2=Off, Sw3=Off 4MB memory
  5. Sw4 (ALT386SX Only) - Page mode - ALWAYS On
  6. Sw5 - Wait states - ALWAYS Off
  7. Sw6 - 8/16MHz clock - Off = 16MHz
  8. Sw7 - Mono/Colour - On = Colour
  9. Sw8 - Enable/Disable serial - On = Enable
  10. Sw9 - (ALT386SX Only) - Pipeline - ALWAYS ON
  11. Sw10 - Drive B: - type II - ALWAYS OFF

    ALT DIP switch settings (Bank B) are as follows:

  12. Sw1 and Sw2 ON = Onboard VGA enabled
  13. Sw1 and Sw2 OFF = Onboard VGA disabled