A game in graphic mode

[dedndave]

come to think of it, this code is one byte shorter because there is no segment override   :bg

        mov     quedas,180     ;falls = 180
        push    ax
        push    bx
        push    dx
        push    ds
        xor     ax,ax
        mov     ds,ax
        lds     ax,ds:[46Ch]
        mov     dx,ds
        mov     bx,301
        pop     ds
        div     bx
        mov     coluna,dx
        pop     dx
        pop     bx
        pop     ax

LDS is similar to LES, except it uses the DS register instead of ES

[amrac]

I've copied you're code and run it and the result is still exactly the same. The ball falls and then jumps to another column. I don't want to be dull  but I think I'm not preserving the registers the right way in another procedure.
I still don't understand that line of code:
lds     ax,ds:[46Ch]

[dedndave]

put your ASM file into a ZIP file
below the reply window is a link for Additional Options...
click that, and attach the ZIP file
i will look at the entire code and see if i can spot the problem

        lds     ax,ds:[46Ch]

that line of code is the same thing as

        mov     ax,ds:[46Ch]
        mov     ds,ds:[46Eh]

LDS stands for Load DS
LDS AX,[nnnn] loads DS and AX at the same time from the dword addressed by [nnnn]
it could be a label like SomeDwordPointer
LDS AX,SomeDwordPointer
you might see it used with SI
LDS SI,SomeDwordPointer

http://www.arl.wustl.edu/~lockwood/class/cs306/books/artofasm/Chapter_6/CH06-1.html#HEADING1-102

[amrac]

Hi
Here goes my code.

[dedndave]

hiya amrac
i am looking at the "pixel" proc
i think there is something wrong with the way the count is kept
let me play with it a little bit....