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- Pokemon Puzzle Challenge uses a four-byte RAM address at 0000C83C to drive its random number generator (RNG). I am beginning to wonder if some of the most popular GBC emulators are handling parts of this address incorrectly.
- Both bgb and Gambatte (via BizHawk) boot the game with both C83E and C83F at their maximum value, 255. You can zero out C83E by holding a button as the title screen cutscene loads, but C83F is stuck at 255. It might be possible to roll it over to zero, but it would take ages.
- I have examined literally THOUSANDS of RNG values in BizHawk to get the starting stage patterns that they generate. Not ONCE have I gotten anything on console (GB Player or GBA SP) that matches one of these values... or even close, for that matter. And I am certain that bgb is in the same boat because the first stage I loaded in my bgb testing matched a stage in the BizHawk findings.
- Then, as I was about to lose hope, I booted the rerecording version of VBA hoping to see something different. And lo and behold, this boots the game with both of the above values at zero. I took a look at one RNG value and got something that matches none of my previous findings. I will investigate this further today after work to find out if this is actually behavior consistent with console. I am really hoping that it is because I am starting to get frustrated looking at this.
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