A85: Carry
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A85: Carry
Okay, it looks like this, I'm not gonna include the source cause it has
a lot of calls and things so i would have to include almost the whole
source. I'm gonna get it working hten, I'm gonna optimize it, I might
need a lot of help with that part!
but I have my board, I'll explain with an ASCII graphics.
_1__2__3__4__5_
1 | |**|P1|**| | P1 = Player 1's pieces
|__|**|__|**|__| P2 = Player 2's pieces
2 |**|P1|**|P1|**|
|**|__|**|__|**| In this example P2 can jump P1 either to the left
3 | |**|P2|**| | or right! So, to jump the player, you move the
|__|**|__|**|__| your player (P2) from 3,3 to either 2,2 or 4,2.
4 |**| |**| |**| Then it checks to see if the place you are moving
|**|__|**|__|**| to has someone at it, if it does then it searches
one more space in the diagnol direction that the
piece was moving! So lets say we moved from 3,3 to 4,2. The program
searches and finds out that a piece is there, then it sees if it's it's
own piece, since you can't hop over your own pieces! It finds out that
it belongs to player 1 so then it wants to search which diagnol
dierection you were going. So it takes your alst place that it stored,
which was 3,3 and then takes your new place 4,2. Then to ifnd out which
direction to go it does this but in asm form (Pos)-(Last Pos) and store
that as A or whatever it goes into. Then I use the carry flag to see if
it is negative, if it's not, it is moving to the right since 4-3=1 it
didn't need to carry, so then it calls the jump to the right routine.
So it jumps over 4,2 and puts you at 5,1. My problem is when I try to
jump left, say instead of jumping from 3,3 to 4,2 we went left from 3,3
to 2,2. This is where it messes up, I don't think I'm using the carry
coretly cause it should go left since it is negative and shoudl call the
left routine, but instead it calls the right routine and ends up at 5,1.
Not 1,1 like it should! Does anyone understand this, or how do I use
carry, maybe I'm doing it wrong?
John