Description
The Amstrad Expansion System aka Maplin ROM Card 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 (?)