nraygun

Hope the developer or someone who knows how this works can help. I tried compiling the ASM output and I get unresolved symbol errors in both Visual Code with the extension and also from dasm via command line. I also tried the bB code and it seems that the timing is all off or is just using a static temp instead of honoring the timing in the midi. If I play the midi with VLC, it sounds correct. Any ideas?

Not sure what I'm getting myself into, but I'll give it a try! And sorry if my first question is a simple one. OK, I setup my dev environment in Linux using this as a guide: https://youtu.be/LxKreALp-Ec I then grabbed a sample app to set the background to blue from here: https://github.com/kreiach/8Blit/blob/main/s01e02/8blit-s01e02-background.asm In Eclipse, I get this single error when compiling, however, the app runs fine in Stella. For input string: "End" I searched for "End" and I only see two occurrences: one in a comment and one at the very end. I'm sure it's something simple. Can anyone help me with eliminating this error or should I just ignore it?

Oh, I see, I didn't realize the cartridge had a whole other processor in it. Found this, "DPC+ is an extension of the original DPC chip that was developed by Activision and included in the Pitfall 2 game released in 1982. It basically allows you to update graphics faster and much easier, and also includes more ROM, RAM and better sound. The DPC is actually implemented using a 70mhz ARM processor, so in addition to its features, it also allows you to write game logic in C which is then executed by the ARM. All interaction with the TIA still needs to be done in 6502 assembler." So it's really like a whole new system given the additional ARM CPU. Sort of.

I had to join this forum specifically to congratulate the team on Mappy for a job well done! The port is absolutely stunning and an impressive achievement given the hardware. Wonder if Atari could have made an Atari 2600+ with a built-in DPC chip back in the day. Seems like it would have given the NES a run for its money. Hat's off to the developers of Mappy!