i was wondering how to create player stats that stay there and are available for when the program is restarted. i know i cant use saferam for this because it gets deleted when program is done running. and than i can also do something like


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but if i did that how would i access each different element of it.

Looks like you have an array set up. In that case, use hl to index the array, and load from offsets of hl. For instance:


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I know the above could have been done better with ldir, but it's important that you understand the concept of loading from (hl).

As for saving it after the program quits: you can either have an area of the program set off for it and use SMC, or you can create an appvar, list, or other object to house it. I prefer to use appvars, but that's just me.

can you please comment the above code so that i can understand what exactly is going on.

Most shells, including Ion, DCS, and MOS, use some form of writeback. Therefore SMC would be the way to go.

how could i do it with ion since that is what the game is going to be made with

Just have your .db whatever somewhere in the program, and directly read and write to it. No need to do anything else fancy...

Sure thing lafferjm


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Good stuff @ Chip. That's an impressive amount of commenting...

how would i do that. and thanks for the commenting chipmaster it helped a lot.

heh, thanks. I just wish I could have written it fast enough to be the next post after lafferjm's request. Drat, I couldn't even type up this response fast enough to be right after you, Kerm.

That's what I was demonstrating in my code segment. Well, at least the reading part. To write, you essentially do the reverse of that process.

By reading a tutorial like "Learn Z80 ASM in 28 Days"

is this possible and if so i think i might do it because it would be a lot easier.


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and do the same for the other stats.

Incorrect use of hl. You need:


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Or, alternatively:
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kinda. Its actually "inc (hl)" because you want increase the number stored at the location HL points to, not HL itself

here's what your code is doing


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here's what it should be


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EDIT: You beat me Kerm

thanks kllrnohj and Kerm. i think i might use that way since it is a lot easier.

But not as reliable. There is always the possibility that the writeback routine is buggy (i know its a slim chance - but a chance nonetheless), or more likely that the user has turned writebacks off

My way = Kerm and Kllnohj's way, except that mine is dynamic, meaning you can have variable amounts of stats instead of loading them individually. In any case, ldir is the way to go with moving sequentially located memory.

if i load the stats individually could i display them with the code that i thought would increase atk.

If you're loading stats individually, you are programming very inefficiently. Beyond that, how do you expect that code segment to display the stats. That's only going to copy them somewhere.

To display a number you have a multitude of options. You can use _DispHL which will display HL in big text. You can use _dispOp1a which will display a digits of Op1 in small text. You can convert the number to a string and use _puts or _vputs. You can also write your own display routine.