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Old 04 December 2018, 23:21   #7
ross
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Join Date: Mar 2017
Location: Crossing the Rubicon
Age: 53
Posts: 4,479
Quote:
Originally Posted by mcgeezer View Post
Cheers Ross.

Considering my Rygar implementation though it is running in 2x fetch mode. The challenge is to know if it's technically possible to get it running in 4x fetch mode.

When I played around with this initially I couldn't get it to work so settled on 2x mode... but the playfield is only 256px wide so I'm unsure if it is achievable or not.
Not if you want a centered screen.
1x -> DDFSTART=$38 -> DIWSTART=$91, DIWSTOP=$1b1 -> 288px
2x -> DDFSTART=$38 -> DIWSTART=$a1, DIWSTOP=$1a1 -> 256px
4x -> DDFSTART=$38 -> DIWSTART=$c1, DIWSTOP=$181 -> 192px
Sure you can have a screen in 4x with a 64px left screen part covered by sprites, and a full 256px right part, but for another game

Cheers
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