Light Guns and Speccy

For experts to discuss very technical stuff and newbies to ask why the Spectrum they bought off ebay doesn't work.
retro_collector
Berk
Posts: 15
Joined: Fri Sep 13, 2019 6:58 pm
Location: Chicago, IL USA

Light Guns and Speccy

Post by retro_collector » Mon Sep 16, 2019 1:57 am

I am thinking of getting a light gun for the spectrum.

So these questions:

Any SPectrums with Composite or do I need to do the mod?

Which spectrum is the best for composite and light gun?

Are there enough light gun games to make it worth while?

Please let me know your opinions

Thanks

Bill
0 x

User avatar
ZXDunny
Manic Miner
Posts: 239
Joined: Tue Nov 14, 2017 3:45 pm

Re: Light Guns and Speccy

Post by ZXDunny » Mon Sep 16, 2019 8:16 am

You absolutely, definitely need an old CRT TV to play on. LCD will not work. I'm not sure if composite will affect it; I suspect not.
0 x

User avatar
1024MAK
Manic Miner
Posts: 514
Joined: Wed Nov 15, 2017 2:52 pm
Location: Sunny Somerset in the U.K. in Europe

Re: Light Guns and Speccy

Post by 1024MAK » Mon Sep 16, 2019 8:52 am

UHF / Composite Video / RGB Video - does not matter. But results may be better if using composite or RGB.

The 16K/48K/+ only have UHF TV outputs as standard, but can be modified to output composite video (may not work with all TVs).

128K toastrack: RGB (TTL level) and composite video both available from the RGB/video/monitor socket.

+2 (grey): RGB (TTL level) and composite video both available from the RGB/video/monitor socket (assuming the default configuration is wired up on the PCB). But some units require a modification to correct a manufacturing problem.

+2A, +2B, +3: Only RGB (TTL level) is available from the RGB/video/monitor socket. Composite video is not available. It can be added, but requires extra circuitry.

Note: the video output using any of the above connections may not work with all TVs, as there are limitations between the output signals and the signals that modern TVs expect. Older CRT TVs, being analogue are much more forgiving in this respect.

No ZX Spectrum model has any specific hardware support for a light gun or light pen. Because of this, performance is nowhere near as good as computers where there is built-in hardware support and a CRT display is used.

Some light guns were produced for the 128K models, they connect to the RS232 or Aux port (sorry, can’t remember which).

Before then, light guns either used a bespoke interface, or connected to a compatible joystick interface (with the 9 way D-connector wired to the Atari standard).

Mark
0 x

retro_collector
Berk
Posts: 15
Joined: Fri Sep 13, 2019 6:58 pm
Location: Chicago, IL USA

Re: Light Guns and Speccy

Post by retro_collector » Mon Sep 16, 2019 2:43 pm

Thanks Mark and ZXdunny,

I have 2 CRTS, one is VGA and the other accepts Composite or Svideo.

I have my eye on Cheetah Defender Light Gun. I have a +3 speccy but as we all know there is no composite.

How many games are there for this light gun?

Thanks
0 x

User avatar
Alessandro
Manic Miner
Posts: 491
Joined: Wed Nov 15, 2017 11:10 am
Location: Messina, Italy
Contact:

Re: Light Guns and Speccy

Post by Alessandro » Mon Sep 16, 2019 3:20 pm

retro_collector wrote:
Mon Sep 16, 2019 2:43 pm
How many games are there for this light gun?
This is a compilation which came with the Cheetah light gun: https://spectrumcomputing.co.uk/index.p ... 6&id=11242

You could also try the compilation which was bundled with models sold with the Sinclair light gun: https://spectrumcomputing.co.uk/index.p ... 6&id=11353

With the Magnum Light Phaser was included a special edition of The Living Daylights, plus two bonus mini-games; maybe they will work: https://spectrumcomputing.co.uk/index.p ... 6&id=11292

These games were designed for the Spanish Gun Stick, you might try them as well: https://spectrumcomputing.co.uk/index.p ... up_id=1006
0 x

retro_collector
Berk
Posts: 15
Joined: Fri Sep 13, 2019 6:58 pm
Location: Chicago, IL USA

Re: Light Guns and Speccy

Post by retro_collector » Mon Sep 16, 2019 5:00 pm

Gratzie Alessandro!

I will try those.

Nowe I just need a Spectrum that works with the light gun and my CRT :)
0 x

Joefish
Manic Miner
Posts: 621
Joined: Tue Nov 14, 2017 10:26 am

Re: Light Guns and Speccy

Post by Joefish » Mon Sep 16, 2019 5:55 pm

Didn't those early light-guns with interfaces just detect one moving bright spot on a dark background, like the old 70s TV game units, rather than try and measure the exact raster position like a lightpen?
0 x

User avatar
1024MAK
Manic Miner
Posts: 514
Joined: Wed Nov 15, 2017 2:52 pm
Location: Sunny Somerset in the U.K. in Europe

Re: Light Guns and Speccy

Post by 1024MAK » Mon Sep 16, 2019 8:05 pm

Because the hardware does not support light guns/light pens, it’s not very practical to get an exact raster position... :-(

Mark
0 x

User avatar
Guesser
Microbot
Posts: 121
Joined: Wed Nov 15, 2017 2:35 pm
Contact:

Re: Light Guns and Speccy

Post by Guesser » Mon Sep 16, 2019 8:42 pm

1024MAK wrote:
Mon Sep 16, 2019 8:52 am
+2A, +2B, +3: Only RGB (TTL level) is available from the RGB/video/monitor socket. Composite video is not available. It can be added, but requires extra circuitry.
You mean analogue surely.
0 x

User avatar
1024MAK
Manic Miner
Posts: 514
Joined: Wed Nov 15, 2017 2:52 pm
Location: Sunny Somerset in the U.K. in Europe

Re: Light Guns and Speccy

Post by 1024MAK » Mon Sep 16, 2019 9:22 pm

Guesser wrote:
Mon Sep 16, 2019 8:42 pm
1024MAK wrote:
Mon Sep 16, 2019 8:52 am
+2A, +2B, +3: Only RGB (TTL level) is available from the RGB/video/monitor socket. Composite video is not available. It can be added, but requires extra circuitry.
You mean analogue surely.
Well, it’s not any known standard... It’s not normal analogue video level signals. And it’s not simple true TTL either...

Mark
0 x

Post Reply