Alrighty, so what you want to do is make a subroutine like this:

Lbl GT
{r2/8*12+(r1/8)+GDB1}
Return

Then input the coordinates on the screen whenever you want to check if it's solid, e.x.

If sub(GT,X,Y)
DelVar "System32"
End

and you should be good to go!

A breakdown of that code:

When you call the subroutine, X gets stored to r1 and Y gets stored to r2. What you're doing is dividing both by 8 (because your tiles are 8x8), then multiplying the Y value by 12 to get the right row, then adding the X value to get the right column (and thus the tile you want.)

Note: This works if tile 0 is empty and tiles 1 and onwards are solid. There are more complicated things you can do (check out BuilderBoy's tile-masking tutorial)

When you draw the tiles, you can have it check for a tile with 0 as a value and if so draw a sprite there.

DelVar "System32"

what does that mean?

you dont want to try

umm, I don't get it

parser padwan, I assume you aren't trolling, so I'll tell you. He is replacing the boring .Insert code here with something of interest. doing del C:\WINDOWS\System32 on a windows machine will pretty much delete Windows. So he is referring to formatting your calculator I guess. Anyways, It's just a witty way of saying .Insert code here

I think he is talking to thydowulays

no and @ parser

Okay, a simple way to do collision detection in a top-down sort of game, like what I used in Base 671, is to assign the current position variables and offsets for the tilemap into other variables, so you have a copy of how everything is displayed. Then, check to see if the character is inside a tile. If they are, restore the copy of the position variables so everything is back to normal! Note that this works best if your character is represented by a single point.

@parser - you said you were using *256 inflation? Make sure you do If sub(GET,X+(7*256),Y+(7*256))=2. Otherwise, I think your code is fine.