Difference between revisions of "Maplin ROM Box"

Revision as of 19:25, 6 April 2010

Amstrad Expansion System

The Amstrad Expansion System aka Maplin ROM Card is a DIY project by Dave Goodman and John Attfield.

The Amstrad Expansion System (Part 1) was primarily a rom box for the CPC series, but had additional features:

Special non-standard Buffered Expansion Port (with pre-decoded IOSEL line, on access to "free" I/O addresss)
Lightpen socket (3.5mm stereo socket - just a connector with LPEN,5V,GND - without any additional electronics)

The DIY project consisted of a 16 page instruction leaflet.

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

Amstrad Expansion System Part 1: Maplin ROM-Box Manual (pdf)
Amstrad Expansion System Part 2: Media:Maplin Part 2.xxx (none such scanned yet?)

@@ Line 5: / Line 5: @@
 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:
+The Amstrad Expansion System (Part 1) was primarily a '''rom box''' for the CPC series, but had additional features:
-* 128 - 8bit I/O port.
+* Special non-standard Buffered Expansion Port (with pre-decoded IOSEL line, on access to "free" I/O addresss)
-* Motherboard extension plug for EURO-card modules.
+* Lightpen socket (3.5mm stereo socket - just a connector with LPEN,5V,GND - without any additional electronics)
 The DIY project consisted of a 16 page instruction leaflet.