I am trying to place maybe five pixels on the screen at one time. I posted a few weeks back and somebody showed me how to get one pixel on. It went something like this in debug: mov ax, 0004 int 10h mov bx, b800 mov ds, bx mov bx, 1000 mov word ptr[bx], 0055h That would place one pixel in the video memory at b800:1000 and it would appear on the screen. So how can I do it for five pixels? Thanks

My assembler is a bit rusty - haven't used it in anger since 1985. Anyway, to access 5 consecutive pixels, it would be something like this mov ax, 0004 int 10h mov bx, b800 mov ds, bx mov bx, 1000 mov cx,5 ; Number of pixels more: mov word ptr[bx], 0055h inc bx loopnz more ; dec cx and do the next one

I do not have much experience in ASM yet. How do I dec CX?

I think the "dec cx" was meant as a comment.. > loopnz more ; dec cx and do the next one The loop operations decrease CX automagically and jump to the label (here: 'more:'), when cx satisfies a certain condition (here: nz = is not zero). Just ignore everything after ";"s - it is comments.

Thanks for the clairification!

The above responses will depend on the video mode being accessed. If we are talking about "mode x" (&h13) then direct video memory access as the examples above indicate would be sufficient. However, just about every higher definition mode requires page swapping through the video card registers and that can vary upon the video card and video modes supported so you may want to consider this or at least look into it if it applies to your application. borelli33