Invaders!

[LS_Dracon]

Would you like to play Space Invaders on our beloved Odyssey^2?

No, Alien invaders Plus do not count!

 

Invaders! (prototype name) is my 3rd and most ambitious homebrew game for the Odyssey2.

 

For now what you see is a "playable concept proof".

 

As you can see on the image, there's some limitations:

1 - I can put only 8 aliens in a row.

2 - I can't draw the iconic alien graphics, I need to use the non customizable Odyssey2 char set for most of the graphics.

3 - there's only 1 alien row because what you see is all I can put on a screen using the Odyssey 2 hardware.

 

I will use the "2600 kernel style" code to put more alien rows, but I don't know if emulators will support it in future versions.

I don't even know if it gonna works on real hardware, theoretically, it will.

I will try to add 5 rows on a screen. If it doesn't works, the project is over.

 

Follow the picture and the rom.

 

You can destroy the aliens, the game resets if you kill them all. There's no collision on the player ship and it's graphics is a placeholder, and there's no sound.

 

invO2.rom

Edited April 18, 2016 by LS_Dracon

[+eebuckeye]

How do people use the rom on real hardware? Looks great!

[LS_Dracon]

People use René's 7051 flash cart, I don't own one because I use Linux and the cart uses serial connection and usb-serial cable adapters doesn't works on my computer.

Check this great VectrexRoli video about it anyway :

 

https://www.youtube.com/watch?v=NUe_C_bwI-Q

Edited April 18, 2016 by LS_Dracon

[+atari2600land]

You're off to a great start! You don't happen to know where I could get the program that puts Odyssey 2 programs onto my C7050 cartridge, do you?

Anyway, it would be really cool if you could add the two background notes from the original.

[LS_Dracon]

Thanks!

I don't know anything about O2 flash carts.

I test my projects with a RAM cart and it's limited to 4kb rom, and very difficult to load stuffs as it was not exactly made for O2.

 

Yes, the background "heart beat" is a must need, don't worry

[+atari2600land]

What happened to this? It looked promising.

[LS_Dracon]

I was trying to make a code to display a char on screen. I don't want to use the BIOS code because it is too slow.

After many days, I made this code to work, so now I can progress with rest of the game.

 

Sadly, from now, the progress will be very slow.

[+Darrin9999]

Any updates on this game?

[LS_Dracon]

Sorry guys, the code stopped to work on real hardware.

Odyssey 2 is too sensible for timings and objects redrawing, I was pushing it too much, it seems. If you do something wrong, you have a black screen.

 

Not means I'll quit this project, but I'm working right now in a golf game and this new project is progressing nicely, I have plans to release a beta soon.