nesdev.org

Posted: **Sun Jul 20, 2014 11:14 am**

I have a problem scrolling, I thought it would be simple
but when I write for example:

lda x
sta $210D

lda y
sta $210E

There is a bug, Horizontal and Vertical scrolling does not work , x becomes vertical.
I put my demo, I remove a bug, I've written only :

lda x
sta $210D

How to scrolling Horizontal and Vertical ?
Thank you for your help.

Posted: **Sun Jul 20, 2014 12:13 pm**

You have to write 2 8-bit values to each register.

lda lowX
sta $210D
lda highX
sta $210D

lda lowY
sta $210E
lda highY
sta $210E

Posted: **Sun Jul 20, 2014 1:37 pm**

The solution was simple ><
Thank you for your help, I can continue

Posted: **Sun Jul 20, 2014 1:49 pm**

Posted: **Sun Jul 20, 2014 2:29 pm**

Thank you for documents

Problem scrolling