In general, I've noticed the sound in BeebEm (for Windows) tends to go a bit screwy after its been running for a while. It seems to get worse if the computer is busy doing other things at the same time. A 'workaround' is to click on the BeebEm window title bar which appears to reset the sound back to normal, for a short while at least.

It's probably not an issue with your game code, especially since you say it works in other emulators.

Thanks Paul, it's re-assuring to know. It certainly works fine on v4.05 of BeebEm.

Certainly something to make note of anyway.

Neil

Ok small update...

Working on the changes requested :
I have done the following...

* Fixed Sound issue.
* Fixed Slow down issue.
* Extended the score display to five digits.
* Limited the number of lifes to six.
* Extended score for bonus life to 1500
* Removed the 'press fire' and sparse invaders name from 'next level' screen
(Added 4-5 second delay instead)
* Fixed Start level, so invaders appear correctly.
* Fixed issue where player wasn't getting drawn until moved on life loss.
(also added 1 second invin to stop deaths happening quickly - this might need to be extended)


Need to implement:
* Change the intro screen text.
* Pause while playing game
* Exit game option (while paused)
* Intro screen and loader. (Might do this in 6502, not sure about basic )
* Joystick control


Now, is there anything else that I've missed?

thanks, Neil

Unbelievably, I think there might be!

See attached vid!

(if you simply make it possible for the Aliens to collide with the player one row "higher up" then I think that should address things).

Thanks Dave, easy one to change - the invaders stop at the tip of the player now, not reducing him to a one line gfx !

Another update:

I've only the loader and joystick control to do, hmm at present ... !

I will upload another version today, at work given time, or over the next few days. There has been a FEW changes so really for you guys to have a play and hopefully you'll get the same vibs as myself - it's starting to get that FINISHED feel. I'll try not to leave test code in this time thou!

Juyst really wanted to wish all a fab time for the holidays,

Merry XMAS!

Neil

Merry Christmas to you to, what a great dedication and gives us all inspiration to get moving on with our projects.

Great work Neil,

Thanks Steve, hope your xmas is fab too.

Here's the update... Please see above for the chances. However press 'P' during game for pause. Also pressing 'ESC' while paused will quit the game.

I need to have a look at doing the joystick. Any clues would be cool LOL!!

Also I'm thinking of the loader, so will do it in 6502, I can do the screen loading, no worries, however is it easy to reduce the size and move the screen so it will show the loading messages etc? I'll have to have a read of the manual.

Right, back to it,
Neil (wishing he had taken the day off, sigh!)

Oops, not had much time to play this, though I think I've spotted an issue - the invaders no longer 'splat' when you Zap 'em (though the motherships are still 'splatterable').

And I still think that 'turns' can go on a tad too long - maybe increase the extra life requirement to 5,000 points (and make it a one-off bonus, as opposed to recurring?).

Btw, some cool news - there will be a Sparse Invaders competition at RetroVision (www.retrovision.org.uk) next month! Can you make it, Neil?

thanks for the newer version Neil

now i will have to wire up my PC to play it!, as xmas tree stole its place

Great work