Screen Flip on Mode 3
- ggvicviper
- Posts: 16
- Joined: Sat Oct 24, 2015 8:54 pm
Screen Flip on Mode 3
Hi, I was wondering if there was a way to flip the screen in Mode 3. I'm building another game for the JAMMA UzeBox, but I'd like to be able to render things 180 degrees if need be. Is there an easy way to do this, or even a way to potentially edit the Kernel to do so?
Re: Screen Flip on Mode 3
So you need horizontal flipping or really 180 degrees rotation? And permanent or dynamically settable? In any of those cases there's no quick way to do this. You need to create a new video mode derived from mode3. It's pretty doable.
- ggvicviper
- Posts: 16
- Joined: Sat Oct 24, 2015 8:54 pm
Re: Screen Flip on Mode 3
Well, it would be both horizontal and vertical flipping, so yeah, 180 degrees. It would need to be dynamic, too.
Re: Screen Flip on Mode 3
It's indeed quite possible to have such a mode but the simplest solution would require a second render loop since you have to traverse the RAM and tiles data "backwards". What would be the purpose of such screen rotation?
- ggvicviper
- Posts: 16
- Joined: Sat Oct 24, 2015 8:54 pm
Re: Screen Flip on Mode 3
Most vertical arcade games have an option for this via dipswitch, since machines can vary which way they rotate the screen to be vertical. Was wondering if there was any way to do this easily with Mode 3.