SPR file
SPR files contain the sprites graphics (equivalent to the C ROMs on cartridge systems). The format is described here: sprite graphics format.
Even if the total memory available for sprites is 4MiB, SPR files can't exceed 1MiB (?).
- Maximum file size: 1MiB
- Type code: 4
- Loadable in: Sprite DRAM
- Banks: 4 (4MiB total)