[ross]

Originally Posted by deimos

0x01fc, 0x0000

Disable AGA fetches.

        0x2b07, 0xfffe,

A line before start of BPL DMA fetches.
07 because is the first position where COLOR00 do not appear on previous line, but you can change in case.

        0xabd7, 0xfffe,

Position near the right edge before the horizontal blank where you do not interact with the previous DMA fetch.
This way you have time to set parameters and colors before the next line, which is located in the vertical middle of the screen.

        BPL1MOD, 0xffd8,
        BPL2MOD, 0xffd8,
        BPLCON1, 0x0000

You need to change this to your needs.