Software Sprites are 10 Times Better with Machine Language than BASIC - Part 2 

I can't get enough 6809 assembly stuff, it's so cool to see the CoCo getting some love. I always like to learn more and getting someone else's perspective is always a good thing. You did a great job with the example code and how you explained what the code is doing and your video production quality was excellent.

If I knew all of this back in the 80s, I could have been a Tom Mix millionaire. Or maybe thousandaire. ASM was black magic to me back then.

dont forget to post these programs, i am myself in the middle of learning 6809 asm myself!

Looks good,Keep up the good work.

very well done! thank you

Excellent explanation

Excellent video! High quality software and hardware in the same video!

Great stuff! Thank you 👍

Ah yes.... good old software blitting.

Could you share this code with us? Both the BASIC and assembly. It would help a lot.

Nice!

Nice video…I really like your explanations of handling these sprites in ASM. But I’m trying to determine how the idle instruction orange bar on the left works. I imagine you coded that. Is it just a matter of having an “idle” routine that counts until the next VSync fires? Then on the next frame you might have a draw idle bar to show how much cpu instructions are left?

I started to learn assembler on C64 6502 CPU and then i switched to intel 80286 CPU and there is a vsync that we can use on VGA display, but this is not enough for a flicker free movement with very large objects high resolution 32 bit color, we have to use double or triple buffering with vsync. We draw all objects on an invisible screen memory and if it is all done we switch the screen to this location and start to draw in the next unvisible screen.

Excellent video, when I was a kid I always wanted to understand how sprites worked in the CoCo. Would you recommend a book about the 6809E architecture and instruction set?

Good work.