Lab - 1: Optional Challenge

 

Optional Challenge: Drawing Border

I went further and attempted the border-drawing challenge:

  • Red line (Top): lda #$02 and writing to the first row of memory.

  • Green line (Bottom): Writing to the last row.

  • Blue line (Right): Iterating through column memory.

  • Purple line (Left): Adjusting X and Y registers accordingly.





This exercise reinforced structured bitmap manipulation.

Final Thoughts

This 6502 Assembly Language Lab was a rewarding deep dive into low-level programming. I gained hands-on experience with:

  • Direct memory manipulation

  • Optimizing assembly loops

  • Understanding CPU cycle timings

  • Creating unique display effects

While assembly coding is challenging, it provides unmatched control over hardware. This knowledge is invaluable, especially when transitioning to modern architectures like x86_64 and AArch64.

Next Steps

I plan to explore further performance optimizations and integrate interrupt-driven routines to enhance efficiency. Stay tuned for more assembly adventures! 😃

You’ve made it to the final challenge—tested your skills, tackled low-level logic, and truly embraced the art of 6502 assembly. Whether you conquered the challenge or picked up valuable insights, this journey has only just begun. Keep exploring, keep coding, and who knows—maybe one day, you’ll be writing your own retro game in pure assembly!

Let me know if you'd like any tweaks! 🚀 Drop a comment below! Let’s discuss assembly magic! 💡🔥

Comments

Post a Comment

Popular posts from this blog

Project Stage 3: Enhancing GCC Pass for Multiple Function Clone Handling: Progress Update

In my earlier work, I developed a basic GCC pass for identifying and comparing function clones. For this latest phase, I focused on improving the pass to handle programs containing multiple cloned functions. Additionally, I wanted to enhance code organization by consolidating data storage, replacing multiple parallel vectors and maps with a structured approach using a dedicated struct to store characteristics of clone variants. Implementation Process Phase 1: Code Revision for Multi-Function Support I modified the pass to properly handle programs with multiple cloned functions in x86 server environments. The updated code includes all critical support files. The revised implementation's core is a specialized pass that processes GIMPLE representation data. This pass systematically identifies resolver functions and creates appropriate tracking structures for each function being cloned. The implementation uses maps and vectors to store function characteristics, including basic block co...
Read more

Lab - 1: Exploring 6502 Assembly

Image
Exploring 6502 Assembly: A Journey into Low-Level Programming  Introduction Assembly language has always been both fascinating and challenging for programmers. Unlike high-level languages where abstractions make coding easier, assembly requires a deep understanding of how the CPU processes instructions. In this lab, we explore the basics of 6502 Assembly Language through bitmap displays, code modifications, performance enhancements, and using the 6502 Emulator. This experience is the first step towards learning more complex architectures such as x86_64 and AArch64.
Read more

Project Stage 1: Troubleshooting a bit - Coming soon

  Procedure for Troubleshooting Debugging using the following method: First Error Analysis: I carefully reviewed the error logs after my initial build attempt failed. Copy ./pass-instances.def:47:23: error: expected ';' at end of member declaration 47 | NEXT_PASS_WITH_ARG (pass_mypass, 1, 1) This suggested an issue with my pass registration syntax. Examining Pass Declaration Conventions: I ran the following to examine the passes that were already included in the GCC source code: Copy cd ~/git/gcc/gcc grep -r "NEXT_PASS" passes.def This showed that NEXT_PASS (pass_name, number) was the proper format instead of NEXT_PASS_WITH_ARG. Function name Pattern Analysis: I looked at various pass implementations to learn more about the name conventions: Copy cd ~/git/gcc/gcc find . -name "tree-*.cc" | xargs grep "make_pass_" This demonstrated to me that the pattern make_pass_X, where X is the pass name without the "pass_" prefix, is what GCC ...
Read more