Difference between revisions of "Amstrad Magnum Phaser"
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[[Image:Amstrad lightgun.jpg|right|thumb|250px|The Light Phaser gun from Amstrad]] | [[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: | 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 | - Operation Wolf | ||
Revision as of 07:46, 3 January 2010
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 - Bullseye - Missile Ground Zero - Rookie - Solar Invasion - Robot Attack
The main reason to buy this gun was for the excellent Amstrad conversion of Operation Wolf. Playing this with a light gun on your Arnold was the arcade experience people relished but rarely got back in the 80's. The other supplied games were fun for a while, but by far the high point was Operation Wolf.
Mastertronic released some more games with Magnum phaser support, but they were mostly budget type Spectrum ports, and were a poor relation to the mighty OperWolf!
