Difference between revisions of "Maplin ROM Box"
From CPCWiki - THE Amstrad CPC encyclopedia!
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Image:ROMBOX_04_MANUAL.JPG|ROM Box and photocopy of how-to build manual | Image:ROMBOX_04_MANUAL.JPG|ROM Box and photocopy of how-to build manual | ||
Image:ROMBOX_05_SCREEN.JPG|Connected showing ROMs | Image:ROMBOX_05_SCREEN.JPG|Connected showing ROMs | ||
| + | Image:Maplin_ROMBoard_PCB_Top_(1).jpg|PCB Top (1) | ||
| + | Image:Maplin_ROMBoard_PCB_Bottom_(1).jpg|PCB Bottom (1) | ||
| + | Image:Maplin_ROMBoard_PCB_Top_(2).jpg|PCB Top (2) | ||
| + | Image:Maplin_ROMBoard_PCB_Bottom_(2).jpg|PCB Bottom (2) | ||
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Revision as of 09:40, 1 November 2010
Contents
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) is 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 Amstrad Expansion System (Part 2) adds some more features:
- 6x8bit I/O port (using two 8255 PPI chips)
- Additional power-supply module (PSU)
Pictures
ROM Box with ROMs
ROM Box
ROM Box and photocopy of how-to build manual
Connected showing ROMs
PCB Top (1)
PCB Bottom (1)
PCB Top (2)
PCB Bottom (2)
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Manual
- Amstrad Expansion System Part 1: Maplin ROM-Box Manual (pdf)
- Amstrad Expansion System Part 2: 6x8bit I/O Port (pdf)
