Changes
[[Image:Amstrad lightgun.jpg|right|thumb|250px|The Light Phaser gun from Amstrad]]
== Technical ==
Connects to expansion port 50pin edge connector. Reportedly it uses only 4
pins: VCC, GND, LPEN, D7. Uh, that is, without decoding any address lines or
/IORQ lines?
Trigger Button ---> Request via output to Port FBFEh, then check CRTC input
Light Sensor ---> CRTC Light Pen Input
To read the Trigger button (to be done during vblank):
Port[BCxxh]=11h ;select CRTC register 11h
old=Port[BFxxh] ;-get old value
Port[FBFEh]=7Fh ;\force an edge on the lpen input
Port[FBFEh]=80h ;/(depending on whether button is pressed or not)
new=Port[BFxxh] ;-get new value
if old=new then ... else ...
== Supported Games ===
The Magnum Phazer was released later on in the Amstrads' life, and retailed for £24.99 in the UK. It came supplied with a cassette and a disk, both containing six games:
- Operation Wolf
