DLI question on 5200/8bit

[Ecernosoft]

Hello!

So I wanted to port ICT over to the 5200 (Because why not) BUT I ran into an issue:

1. 4 highres sprites 

2. 4 lowres sprites

3. add 2 sprites together to get 2bpp sprite

4. 2bpp sprites = 2 sprites (!) per line

 

Welp, EVERY SINGLE SPRITE in ICT is 2bpp. And 1 color isn't enough. So I realised I could trigger a DLI at the start of a frame, then change the colors for the BACKGROUND and SPRITES (or just sprites because I don't think I need more than 5 colors for the BK) and then WSYNC. That would give me atari 2600 capability! But, I don't know how to do the DLI ...

I know how to enable it, just how do I trigger it?

 

Thanks. ?

[Ecernosoft]

Oh wait, does the DLI trigger on every 8 pixels (or 16 if the DL is 16 pixels high for that row)?

[TGB1718]

You get 1 DLI per mode line, so depends on what graphics mode you use.

So a 24 line text mode you get 24 DLI's (actually you get 3 more if you count the blank lines  )

[Ecernosoft]

Ok! Thanks.

[Rybags]

What is ICT?

 

DLI limitations shouldn't be taken as meaning something isn't possible, there's alternative ways.

[miker]

@Rybags I bet it's this one:

 

 

@Ecernosoft what about making it more or less stable on one platform first? 

Edited July 31, 2022 by miker