Connects to the Joystick port (not to the Lightpen input on the Expansion Port).
Input:
Light Sensor --> Keyboard.Row9.Bit1 (aka Joystick Down) (0=Light, 1=No Light)
Output:
Keyboard.Row9 is constantly held LOW during lightpen access
Keyboard.Row6 is constantly held 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-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).
'''The pin-outs are unknown?''' * One pin is probably used as Light Sensor, but which?* Other pins might be used as power supply (needing to drag some pins HIGH and others LOW by software) (or does it contain a battery)?** Software seems to indicate it has a battery..? *** Rather not: The spectrum version connects to As seen on the spectrum EAR socket package and to a huge 9V battery (advert, both the amstrad version doesn't seem to have any such 9V plug)* There seems to be no additional button (like on LightLP-guns)?* According to the advert 1 and package, the CAD-MASTER light pen works pens work with '''color colour monitor only''' ("pour moniteur couleur uniquement"), ie. not with green screens.
== Pictures ==
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]]