[[Image:Amstrad light pen.jpg|right|thumb|250px|The LP-1 Lightpen by Amstrad]]
A Lightpen by The '''LP-1''' is the official [[Amstrad]] lightpen (with software from [[Amsoft]], and hardware from [[Trojan]])... The '''CAD-MASTER''' seems to be the same hardware (but marketed directly by [[Trojan]], and with different Software included).
== Technical ==
Looking at the french manual, it seems to be connected 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-ZThe 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* As seen on the package and advert, both the LP-outs are unknown?1 and CAD-MASTER light pens work with '''colour monitor only''', ie. not with green screens.
There seems to be only the light-sensor (no additional button)?== Pictures ==
<gallery caption== Manual =="Amstrad LP-1 (Amstrad/Trojan)">File:Amstrad Crayon Optique LP-1 Advert.jpg|AdvertFile:Amstrad Crayon Optique LP-1 Package.jpg|PackageFile:Amstrad LP-1.jpg|Amstrad Light Pen LP-1 Package - EnglishFile:Amstrad light pen.jpg|Pen</gallery>
<gallery caption="Manual Trojan Cad-Master (in FrenchTrojan)">ImageFile:lp1 1Trojan-cad-master-light-pen-front.jpgjpeg|FrontpageFrontImageFile:lp1 2Trojan-cad-master-light-pen-back.jpgjpeg|Page 1BackImageFile:lp1 3Trojan-cad-master-light-pen-open.jpgjpeg|Page 2OpenImageFile:lp1 4Trojan-cad-master-light-pen-pen.jpgjpeg|Page 3Image:lp1 5.jpg|Page 4Image:lp1 6.jpg|Page 5Image:lp1 7.jpg|Page 6Image:lp1 8.jpg|Page 7Image:lp1 9.jpg|Page 8Image:lp1 10.jpg|Page 9Image:lp1 11.jpg|Page 10Image:lp1 12.jpg|Page 11Image:lp1 13.jpg|Page 12Image:lp1 14.jpg|Page 13Pen
</gallery>
== Software / Downloads == * [[Media:LIGHTPEN.ZIP|Amstrad LP-1 drivers]] - (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)* [[light pen driver|Source code of driver]]* [[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]]