Open main menu
Last modified on 29 June 2011, at 07:09

ACU Romboard (DIY)

Revision as of 07:09, 29 June 2011 by Arnoldemu (Talk | contribs)

A DIY project to make a romboard

Designed by Phil Craven, released in Amstrad Computer User (December 1988, pages 35,37,38).

  • ACU8812035.jpg
  • ACU8812037.jpg
  • ACU8812038.jpg

Technical

ROM Selection is made using a port decoded with A13=0, A14=1. D3 must be 0, D2..D0 select the ROM, allowing up to 7 ROMs to be selected. More than one value can select the same ROM (e.g. &11 will also select &1).