Denial

My immediate thought was that you were suggesting an update to the SSS to offer improved performance mainly by the greater use of the zero page. My understanding now is you are intending to use it as a customised package intended for your use only. Which is fine. As I said above good luck and enjoy ...

So there is a worthwhile challenge for you: integrate the SSS with a screen scroller. As far as your current project goes, you are dealing with an API designed for others to build a program around. I would worry that extensive use of zero page in the API will deprive the program developer of a valua...

I have to say I admire your tenacity and patience. However, I do wonder if this is the best application of your time and effort. Spending time looking for functional improvements would surely be more interesting and worthwhile. You say you have replaced almost all stack push/pull operations and many...

Sorry, I've been following this with some interest, but I can't recall a SBC/BCS technique being discussed. Unless you are referring to Mike's chunky Bresenham snippet. Can you either explain further, or point me to the right post please.

My thanks as well. A fine product, maturing nicely.

The version of Sprite-imation uploaded by hawk uses a user-defined character set (embedded in the program) at $1800. When the program is installed it enables the character set by setting $9005 to the value $fe. Your program seems to want to use the default ROM characters by setting $9005 to $f0. You...

Really impressive work. Must have taken a lot of hours. I admire your dedication and attention to detail. Well done.

If I could only choose one book to learn how to program in Assembly / Machine Language on the VIC-20 , what would it be (and perhaps, why)? If you want a good beginner's book, take a look at VIC-20 Machine Code by Bruce Smith. You will find it in the Internet Archive. I stumbled on it by accident a...

I have been trying to learn via CBM prg Studio , but don't feel the proverbial "light bulb" coming on such that I could design, code, build, and execute something with utility and (hopefully) longevity. I'm afraid design needs to be done elsewhere using whatever method you are happy with....

Hi, It looks to me like you are beginning to learn assembler, or perhaps returning to it after a long break. The strikes a chord with me as I came back to the VIC-20 after a nearly 40 year break while I scratched a living. For what it's worth, if you are using Windows to host a development environme...

Thank you. I will live happily ever after.
I liked your text. Perhaps you shouldn't restrict yourself to unexpanded memory and try something more expansive.
Well done.

Hi, You might like to take a look at CBM prg Studio. It is a Windows IDE giving you the ability to develop software for the VIC 20 and other Commodore machines in both Basic and assembly. The assembler is straight forward to use and is supported by a help facility and tutorials. The IDE has a built ...

For a first game this is pretty good. It is a big challenge to squeeze every thing you would like into standard memory. There was a recent poll on how much memory people have and 8k expansion seems to be available to most people. I too struggled to understand quite what the game is about, so address...

Thanks for the comments. Very much appreciated.

I think this is a font (typeface) problem. I see the same on my Vice 3.7 GTK3 installation on Win10. If I change the font from Monospace Normal to Monospace Bold the equals displays correctly. The equals seems to display correctly for most of the selectable fonts. Courier is another font which doesn...