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Posted By

javierglez
on 2020-12-12
16:40:34
 A game for C16

I wrote a game alike to the dino game from Chrome browser when in offline mode, two versions for both the VIC-20+8k and the C16.

You can watch the VIC20 gameplay here:
https://www.youtube.com/watch?v=RY7heUkOMww

And you can get the C16 binary if you like from here:
https://commodoremania.com/foro/index.php/topic,2404.0.html

Posted By

Csabo
on 2020-12-12
17:01:40
 Re: A game for C16

Awesome!

What is the official title of this game? Is it "Oflain16" (like the filename)? I don't see the title displayed in the game. It is temporarily available under that name on our site: Oflain16 - I'll be happy to change it if that's not the correct title.

Also, when I start it in YAPE, the display is garbled. I have to enter >FF12 0 from monitor to fix it. What emulator did you use to test your game? Or was it perhaps on a real C16?

Posted By

Verona
on 2020-12-12
17:08:50
 Re: A game for C16

I just saw the video. Awesome game! Even better that Godzilla.

Posted By

Csabo
on 2020-12-12
17:18:10
 Re: A game for C16

The culprit for the bug is the sound initialization at $3B8F. It ends up writing $7C into $FF12, which messes up the charset, even though in the beginning the code sets $FF12 carefully.

For now, we can run the game with POKE15261,44:RUN, after which it works just fine.

Posted By

javierglez
on 2020-12-12
19:02:31
 Re: A game for C16

I'm glad you like it, and thanks for the feedback. I used VICE, I haven't checked on a real machine although I do have them. I just changed the bugged line to clear only the 2 bits of the register which concern sound.

I adjusted the difficulty for a VIC 20, which has 25 columns and this version uses 32. I think I multiplied horizontal speeds and separations by the a factor of 1.25-1.3 but just noticed it feels a bit unfair. Maybe I should tweak parameters a little bit more.

Yes I like the title, it's spanglish for Offline. The lines of text with the instructions is retrieved from the REM lines and can be removed or translated at will.

Posted By

Mad
on 2020-12-13
02:28:32
 Re: A game for C16

Woohoo nice!! I think I remember some insanely long stream on youtube with people playing this game (or challenge themselves to play this game very very long).. Maybe it was (I don't remember) around a ??year??.. Nice that you brought this too the C16 / Plus/4!!

Posted By

Csabo
on 2020-12-13
07:13:09
 Re: A game for C16

Thanks for the quick fix, I uploaded the new PRG to Plus/4 World as well.

Posted By

javierglez
on 2021-05-24
10:50:42
 Re: A game for C16

Trying to fix the NTSC issues I noticed a major bug, I reloaded the files to the Spanish forum, now the game is a little bit easier though.

Also I'd like to introduce a new game with versions for both VIC20+16kb and C16, 16k.

You can get the C16 binary and read about the arcade game it is inspired from (actually just its1st level ), here:
https://commodoremania.com/foro/index.php/topic,2452.0.html

You can watch the VIC20 gameplay here:
https://www.youtube.com/watch?v=5vYkcGLmBTw

Posted By

Luca
on 2021-05-24
11:22:17
 Re: A game for C16

Very very well done, Javier! It's a lovable porting of one of the most obscure Berzerk's clones I0ve seen ever in my arcade standing's youthness. Hope to see more of these ones, there are dozens of Spanish ancient arcades which deserve a C16 conversion wink

I dated Sidelsa 2021 May the 4th, was I right?
And I also added the last fixed version of Oflain16. ;)

Posted By

javierglez
on 2021-05-24
13:18:48
 Re: A game for C16

That's nice you can remember the game from the era. We travelled by coach to Italy in the last year of school, I keep a magazine from that trip. That was big deal in the mid 80s.
I can't get to work the virtual keyboard in the web emulator. If it's not possible to emulate pressing F1, I'd add some other key to start the game.
If it is possible to add my user name, this was my 10th post but the registration form didn't show up.

Posted By

javierglez
on 2021-05-24
13:19:58
 Re: A game for C16

OK now the form did show up



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