Sprite graphics format
The 16x16 pixels sprite tiles are divided in 4 8x8 blocks, like this:
| 3 | 1 |
| 4 | 2 |
Each row of these 8x8 blocks are stored in a 4bit planar organization. Bitplanes 1 and 2 go in the odd C ROMs (C1, C3...), while bitplanes 3 and 4 go in the even ones (C2, C4...).
(Need diagrams)
