Boink Bouncing Ball demo on CoCo 3

Boink demo running on the Tandy Color Computer 3.
This was another great demo that took advantage of the tricks that could be pulled off with CoCo hardware. The demo isn't actually drawing anything as it runs, nor does the CoCo have the ability to use sprites or multi-layer graphics. This is all done by manipulation of the video & palette registers.

For more information and a download, check out:
http://www.axess.com/twilight/sock/cocofile/demo.html

Category:

Entertainment

Tags:

• CoCo
• Color
• Computer
• Demo
• Sock
• Master
• tandy
• trs-80

[navydave1]

What happened? It looks squished now. I think when YouTube went to a widescreen type box it squished it somehow.

[sockypoo]

I have no idea! Some of my videos are okay, others are now squished like this. I can't find any settings or other way to convince YouTube not to squish it.

[sockypoo]

The CoCo has a 1.79Mhz 6809 - no graphics acceleration but it has an interrupt controller and you can fiddle with the video registers on-the-fly to achieve effects.

In this demo there isn't actually anything being drawn at all - it's all tricks. There is one 16 color graphics plane. The static background is created with palette remapping and the bottom part is only one line below the ball but that line is repeated so as to match the position of the ball.

[CrazyJesseful]

I loved making "screen-saver " looking stuff written in basic on the coco3. Those were the days. A=A+x LOL

[Petrander]

Is this one of these tricks you simply cannot emulate? With the currently available emulators anyway...

[A1260T]

this is gobsmackingly delightful and even more so considering the hardware!! Truely a great piece of code!!

[remtube]

This demo is incredibly smooth when running on a real CoCo 3. Outstanding job, Sock Master!

I just tried posting a video response of a realtime scaling demo I did.

[owlfood]

ahh i had the old coco1 the trs-80. which we lovingly called a trash-80. it had a whole 8 colours! only 4 of which you can use at the same time. but you couldnt use any 4, nooooo, that would be too easy. you could only use either red, green, yellow and blue. or buff, cyan, magenta and orange. i think you could use black and white as well in "hi res"..memories!

[navydave1]

Hmm, wonder if you re-submit the video it would fix it. But then you would probably loose all the comments.

[ShamW0W]

I remember this demo. I used to have it. I need to hit my parents up and see if they kept my old CoCo's I, II, III. Wasn't there a spoof of this called B'Joink or something?

[m1omg]

IBM PC won because the Commodore crashed not because it was "more powrful".

The Commodore Amiga was the powerhouse.