Maplin ROM Box

Amstrad Expansion System aka Maplin ROM Card

Amstrad Expansion System

The Amstrad Expansion System is a DIY project by Dave Goodman and John Attfield.

The Amstrad Expansion System was primarily a rom box for the CPC series, but had additional features:

• 128 - 8bit I/O port.
• Motherboard extension plug for EURO-card modules.

The DIY project consisted of a 16 page instruction leaflet.

Maplin's Amstrad Projects

Maplin released various projects. The Amstrad CPC related ones are:

• MAPLIN PROJECTS BOOK 18 - Amstrad Expansion System Part 1: an external ROM card system for the Amstrad
• MAPLIN PROJECTS BOOK 19 - Amstrad Expansion System Part 2: describes the 6 x 8-bit parallel I/O Port and PSU Card
• MAPLIN PROJECTS BOOK 20 - Amstrad 8 Bit Input Port

Pictures

• 
  ROM Box with ROMs
• 
  ROM Box
• 
  ROM Box and photocopy of how-to build manual
• 
  Connected showing ROMs

Manual

• Maplin ROM-Box Manual (pdf)

Unclear if above manual covers both Part 1 and Part 2 of the Amstrad Expansion System project (?)

Weblinks

Info on EURO-card standard