Welcome!
> This is the command:
> LDA playf0,X ;load in the data for playfield 1
> STA PF0
I "think" in Basic, so here is the Basic version:
A=playf0(X)
We know that playf0 is at a certain location in memory (you set it with
the EQU at the beginning of your program).. X is an offset from that
location. In other words, it's an array (you can also use ,Y as an array
offset, but not A). But getting back to your example, if X=0 then you
might as well have said: LDA playf0, if X=1 then LDA playf0+1, etc, but
this way it's not stuck to a certain location. This is good for loops,
where you'll use X or Y as your loop variable.
calamari
>
> Also, what is X contributing to the process in the above LDA statement?
>
> That'll do for now, any help appreciated. I'm also seeking any baby-step
> docs similar to Kirk's redline demo... aka liberally commented source code
> for newbies! :)
> Thanks!
> Brian
>
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