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'''[[Image:Amstrad Expansion System''' aka '''Maplin ROM Card'''.jpg|thumb|150px|Amstrad Expansion System]]

* MAPLIN PROJECTS BOOK 18 - == Description == The '''Amstrad Expansion System ''' aka '''Maplin ROM Card''' from [[Maplin]] is a DIY project by [[Dave Goodman]] and [[John Attfield]]. The '''Amstrad Expansion System (Part 1: an external ROM card system )''' is primarily a '''rom box''' for the AmstradCPC series, but had additional features:  * MAPLIN PROJECTS BOOK 19 Special non- standard Buffered Expansion Port (with pre-decoded IOSEL line, on access to "free" I/O address)* Lightpen socket (3.5mm stereo socket - just a connector with LPEN,5V,GND - without any additional electronics) The '''Amstrad Expansion System (Part 2)''' adds some more features: describes the 6 x 8-bit parallel  * 6x8bit I/O Port and PSU Cardport (using two [[8255 PPI chip]]s)* MAPLIN PROJECTS BOOK 20 Additional power- Amstrad supply module (PSU) == Technical == ROM is selected using an I/O port decoded with A15=1, A13=0. The ROM number is decoded using D3-D0 only, meaning a maximum of 16 ROMs can be used, but the PCB only has 8 Bit Input Portsockets available.In addition more then one value can select the same ROM.

* [[Media:Maplin ROM-Box Manual.pdf|Amstrad Expansion System Part 1: Maplin ROM-Box Manual]] (pdf)* [[Media:Maplins Amstrad Expansion System Part 2 (Project Book19).pdf|Amstrad Expansion System Part 2: 6x8bit I/O Port]] (pdf) == Additional == * [[Media:Maplin Video Digitiser.pdf| Maplin Video Digitiser DIY Kit Article]] (pdf)"Electronics - The Maplin Magazine" Dec 1985-Nov 1986. Published by Maplin Electronic Supplies Ltd. Page 12 - 18; Video Digitiser. This DIY Kit could be assembled for use in the Buffered Eurocard Extension board of the Maplin ROM Box for use with Amstrad CPC and Z80 Computers. Gives full instructions on how to build it with board layout and list of components. == Weblinks == * [http://en.wikipedia.org/wiki/Eurocard Info on EURO-card standard]* http://www.maplin.co.uk

[[Category:Expansion ROM]] [[Category:Peripherals]] [[Category:manual]]