Denial

Train Track by thegg I know I said I wouldn't be doing any more puzzle games, but I got bogged down in my main project and needed a bit of a break. So here is a computer version of the pen and paper puzzle Train Tracks. The object of the game is to find a train track that connects two points in a re...

Sure, see my first post http://sleepingelephant.com/ipw-web/bulletin/bb/viewtopic.php?p=114214&hilit=Reliving#p114214 for an example. You need to use raster timing techniques so assembler is necessary. Mike's recent summary of how to synchronise VIA timers with raster lines to avoid flicker is a...

Can't test this as I'm away from my computer at the moment. But as a matter of interest you could try: Trace load m1 m2 with the condition A==value. To see if it would have helped with your debugging. I'm not sure Vice treats the stack as memory, but I suspect it does. This would log all reads of 'v...

Martin, Do you have some sort of specification for your project? For example, some text describing the requirements, diagrams, or anything that is guiding your development. It would be helpful for anybody wanting to help you if you can describe the functionality of the code you are struggling with a...

I'm assuming that you are building your individual .prg files by selecting each .asm separately and using 'Build Program to file' option in the Build menu. When you build that way you are not building the project and the assembler will only have access to data defined within the file being assembled...

For what it's worth, 'undocumented' seems clearer to me.

AndyH is exactly right. Look at the demo I've just posted and on the Repeat Sprites screen you will see the multicolour sprites moving twice as fast as the single colour sprites. That is because I increment the X parameter by 2 at each update of the multicolour sprites and by 1 for the single colour...

Robert: glad you approve. Attached is an update to the project that includes much of beamrider's modifications for the handling of multicolour and taller (3x2) sprites and a small addition of my own. The archive contains a Readme giving a bit more detail. There is an executable for the demo as well ...

The glitch in the graphic display is happening at the point the SSS switches to the other screen in the double buffered display. I don't yet understand why it switches at that point, but I think it has been deliberately chosen: perhaps to allow enough time to rebuild the whole screen before it appea...

According to the VSS-SSS-MMX document (included in my archive and well worth a read), the maximum is 64. The document goes on to suggest a practical limit of 16 discrete sprites. However, there is a 'repeat sprite' facility which allows multiple sprites with the same shape and animation. These copie...

Glad you sorted your problem. I did address text issue in my post above: There is however an issue with my post. I assumed that the character mapping changes are held in the CBM prg Studio project file I supplied as part of the archive. Unfortunately, the custom mapping is held as part of the CBM pr...

But, if i load the sss.cbmprj in the CBM Studio 3.14.0 it do not work. The erros are "Invalid operand, label or variable ... Strange. As I say in the Readme file in the archive, the project was developed using CBM prg Studio Version 4.0.1. I don't think there are any differences in the Assembl...

beamrider:
Thanks for the link, I've copied your code snippet to merge with my code. I'm interested in any further developments, when you have time.

Sven: Sorry to here you are having problems with my conversion. You say you get errors when loading the basic file. The program to load is sss.prg. The other files (including basic.asm) are the source files used in CBM prg Studio to create the program. Try loading sss.prg. If I have misunderstood yo...

A while ago Mike suggested that I take a look at Robert Hurst's Software Sprite Stack (VIC-SSS-MMX). I finally found some time to take a closer look and convert the API and the demo configured in GitHub to a set of files that will compile in CBM prg Studio. The demo runs pretty much as it does when ...