Output:
Keyboard.Row9 is constantly held LOW during lightpen access
Keyboard.Row6 is constantly held HIGH floating during lightpen access(isn't HIGH because it's open collector)
Keyboard.Colums aka PSG.Ext.PortA are configured as inputs aka HIGH-Z
The above LOW and HIGH (or HIGH-Z) levels seem to be misused as power supply GND and 5V. There seems to be no power-supply required for the CPC version (unlike the ZX Spectrum version, which connects to cassette EAR port, and which requires an external 9V battery).
* As seen on the package and advert, both the LP-1 and CAD-MASTER light pens work with '''colour monitor only''', ie. not with green screens.
File:Amstrad Crayon Optique LP-1 Advert.jpg|Advert
File:Amstrad Crayon Optique LP-1 Package.jpg|Package
File:NoPictureAmstrad LP-1.gifjpg|Connector/SchematicAmstrad Light Pen LP-1 Package - English
File:Amstrad light pen.jpg|Pen
</gallery>
== Software / Downloads ==
* [[Media:LIGHTPEN.ZIP|Amstrad LP-1 drivers]] - Software taken from John King's website(English) (bas/bin) - [http://www.cpcwiki.eu/index.php/User:Jonathanen Jonathanen]* [[Media:LP-1.zip|Amstrad LP-1 drivers]] - (English) (DSK for Emulators) - [http://www.cpcwiki.eu/index.php/User:Jonathanen Jonathanen]* [[Media:Amstrad Crayon Optique Trojan LP-1 Tape.zip|Amstrad LP-1 drivers]] - (French) (cdt)* [[Trojan CAD-MASTER drivers.zip]] - none such? The LP-1 package consists of MCPEN.BIN (machine code driver), and LIGHTPEN.BAS (instructions, demonstration, and NIM game).
== Manual ==
* [[Amstrad LP-1 Light Pen Manual]] (jpg's) (French)
* [[Media:Lightpen LP-1.pdf|Amstrad LP-1 Light Pen Manual]] (pdf) (French)
* [[Trojan CAD-MASTER Manual]] - none such?
[[Category:HardwareInput Device]] [[Category:Peripherals]][[Category:Amstrad Products]]