Of course just having a "working 'product'" isn't good enough for me, I actually wanted to know the HOW and or the WHY (does this work)! HOW/WHY does changing a 75 to EB work!?
So, just in case you're like me and it's just not good enough to get something done but to actually want to know the HOW or WHY - this page may be of some help
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So, and I could be massively wrong here BUT, this is my current "understanding" of all this! (please feel free to correct me if I'm wrong!)
it's all based on the machine opcodes - so, 75 is pretty much telling "it" to perform a CHECK, it's CHECKING some condition for "Jump short if not zero/not equal (ZF=0)" -or- in "assembly" a "JNZ" or "JNE"
and changing that to EB, EB is for "Jump" or "JMP" (in assembly)
So, if I am correct, it's "jumping" a/the "check"! And that's good enough for/to me - no need to dig deeper at this point to see WHAT exactly it was checking or WHY...! I can accept this as an "answer"!