About making a hardware split screen

[kezax]

Hello everyone,

 

I wanted to make a screen with two quad sprites on the left and two quad sprites on the right of the screen. And while doing that, I remembered the RESP registers can be triggered only once per line, unless their associated NUSIZ instruct the TIA to output several copies of the sprite per line. Which cannot occur when using quad sprites since they are only 1 copy.

 

Some time ago, some people in this forum played with the RSYNC register, to introduce a delay in the display and make all graphics appear shifted horizontally on the screen, by a few pixels.

 

So I thought that maybe there would be a way to trigger two HSYNC per line using RSYNC, and that would also permit the TIA to reset its state regarding sprite display, and so to display two quad sprites per line.

 

Do you think that could be a working solution ?

 

Edited April 22, 2020 by kezax