Riatoju
RSS

  1. Cracking the code.

    08-31-2019 at 10:03 PM
    Thanksdatagod thanked this post
    LikesJace Hall, datagod, Rogerpoco, wayfinder, nads liked this post


    Making progress, I almost have the main algorithm of Dragster decoded, but I still got alot of work ahead of me! I think I may have found something of interest, but I won't know if it is anything until I fully understand how the code works.

    Updated 08-31-2019 at 10:07 PM by Riatoju

  2. This came in the mail today.

    08-29-2019 at 02:14 AM

    This came in the mail today. It's a special made reproduction of the Stella programmer's guide that developers where given so they can program Atari 2600 games. I'm really surprised such things don't exist for the NES or Sega Genesis.This book has been floating around the Internet ...
  3. A cool hack I discovered as a kid from Mortal Kombat for Genesis

    08-25-2019 at 07:19 PM
    Thanksdatagod thanked this post


    When I was a kid I discovered that if you enter the game genie codes to fight smoke on every level, there was a way you could play as him, as well as all the other secret characters. They all had glitched moves that I'm sure not anyone has ever seen before. Anyhow here's some old videos ...
  4. Dragster Atari 2600 MAXIMUM SPEED possible under impossible conditions.

    08-25-2019 at 06:31 PM
    Thanksnads thanked this post

    This is a hack of Dragster I made to find the -MAXIMUM SPEED- possible under impossible conditions. 3.27 is the fastest possible if the speed counter was set to its maximum and kept there until the end of the race. The maximum speed is possible, what is not possible is the ability to start the game ...
  5. An early draft from my Dragster research.

    08-25-2019 at 06:06 PM
    Thanksnads thanked this post
    Likesnads, datagod, Garrett Holland, Barthax liked this post
    Here is an early draft from my Dragster research with all the various memory locations I could identify. Some of them may not be listed and some might have very vague descriptions but as I continue to work I'll be updating these pages with the correct info. As I know there are others who have done ...

    Updated 08-31-2019 at 01:03 PM by Riatoju

  6. Dragster Overdrive Cheat!

    08-25-2019 at 01:25 AM
    Thanksnads, JJT_Defender thanked this post
    Likesnads, Rogerpoco, datagod, JJT_Defender liked this post

    I developed a cheat that allows the tachometer to max out without blowing out the engine. It also adds a new challenge to the game play as it's possible to achieve a variety of scores. My personal best is 5.61. I strongly believe 5.57 is possible using this cheat.Enter the following codes in ...

    Updated 08-25-2019 at 01:35 AM by Riatoju

  7. See if you can spot the timer in memory.

    08-24-2019 at 01:25 PM
    ThanksJJT_Defender thanked this post
    LikesRogerpoco, Barthax, JJT_Defender liked this post

    I found out where in memory the timer is updated and stored. Using the top right hand portion of the screen, try to see if you can spot it. It's in that small table that represents the Atari's RAM! Even more interesting, it's formatted in binary coded decimal!

    Updated 08-24-2019 at 01:32 PM by Riatoju

  8. $F217

    08-20-2019 at 06:31 PM
    Thanksfrancoisadt thanked this post
    LikesSnowflake, nads, datagod, Rogerpoco liked this post


    Onto the most crucial part of the Dragster code: Where I suspect the notorious algorithm lies: $F217 ($F221) . If it isn't here, I could say for upmost certainty that alot of very important components happen here, like sound, and VSYN/VBLANK which signals the next frame update. During ...

    Updated 08-20-2019 at 06:41 PM by Riatoju

  9. Was having a bad day today until...

    08-20-2019 at 06:15 PM


    This made my day. Just got this in the mail! Roger Blair is a multi world record holder who I met on Twin Galaxies during the Dragster dispute. He, I and several others were in a race to get the 5.57 world record. Although I never achieved mine (The best I got was a 5.61), we kind of formed ...
  10. Got some goodies in the mail today.

    08-19-2019 at 04:32 PM
    LikesSnowflake, datagod, Pat Larocque liked this post
    Got some goodies in the mail today. The first is How to Draw Comics the Marvel Way. I been needing to get this book for a while, alot of people have recommended it and I enjoyed the video featuring Stan Lee on YouTube.
    The second is How to Program the Apple 2 Using 6502 Assembly ...

    Updated 08-19-2019 at 04:43 PM by Riatoju

  11. Dragster Analysis: Progress!

    08-17-2019 at 09:33 PM
    This is the most craziest project I have ever took on because I have never done it before. Dissemble a rom and figure out how it works. This is the beginning of my analysis of Dragster for the Atari 2600. At the moment I'm documenting a function that is responsible for drawing the Dragracers. This ...

    Updated 08-17-2019 at 09:42 PM by Riatoju

  12. The time has come!

    08-17-2019 at 11:01 AM

    This is it! I'm finally going to start disassembling and documenting Dragster. I reacquired knowledge on 6502 assembly language and mastered a basic understanding of Atari 2600 programming. Now let's put this knowledge to use!
  13. Wasted time demystifying the 2600.

    08-16-2019 at 11:34 PM
    I wasted more than an hour trying to figure out where the Atari 2600 maps its collision detection and joystick inputs to.
    Apparently addresses $00-$0D can be set to READ from one location and WRITE to another. For example address $00 is a trigger that can be WRITTEN to in order ...
  14. Progress...

    08-16-2019 at 03:57 PM
    Likesdatagod, francoisadt liked this post
    The Stella instruction manual only has 50 pages. I could finish it in a day and I'm absorbing all the information very quickly.
    If I keep going at this pace it will be all I need to start taking apart Dragster!
  15. Finished reading Using 6502 Assembly Language

    08-15-2019 at 06:48 PM
    Finished reading Using 6502 Assembly Language and now moving onto The Stella Programmers Guide.
  16. This came in the mail yesterday...

    08-14-2019 at 06:06 AM
    Likesdatagod liked this post
    This came in the mail yesterday. A strategy guide by Rudy Ferretti. For the record, I blocked him a year or two ago. I needed a good laugh, which is why I bought this. After I review it, I might burn it, or give it to a homeless guy, or use the pages as toilet paper. I haven't decided yet.
  17. The first ever prism Walter Day Trading Card!

    08-12-2019 at 04:12 PM
    ThanksRogerpoco thanked this post
    LikesRogerpoco, datagod, Pat Larocque liked this post
    ----------

    Updated 08-12-2019 at 08:16 PM by Riatoju

  18. Time to relearn 6502 Assembly Language!

    08-11-2019 at 10:52 AM
    Thanksdatagod, francoisadt thanked this post
    Likesdatagod, Jace Hall, nads, CageFreeman, Barthax and 1 others liked this post

    I decided to refresh on 6502 Assembly. One of the best books ever written on the subject is "How to Program the Apple 2 Using 6502 Assembly Language" By Randy Hyde.

    I also downloaded DiStella, a disassembler for Atari 2600 games, DOSBox to use in order to run DiStella, Ophis a great ...

    Updated 08-11-2019 at 10:55 AM by Riatoju

Join us