Mapper 30?
- Thread starter cbmeeks
- Start date
Kasumi
New member
Technical documentation: https://wiki.nesdev.com/w/index.php/UNROM_512
Can swap the 512 tiles NES has access to to any one of four sets tiles quickly. (Only all 512 at once, no finer swapping like, say, MMC3).
It's CHR RAM, so runtime modifications of tiles is possible, with the usual pros and cons that comes with. (Except because it has four sets of 512 tiles in RAM at once, tile animation is less of something one has to plan around than it usually is with CHR RAM.)
Up to 512 KB. 16KB fixed (always loaded/available), the rest is divided into 16KB segments (banks). You can have one segment in memory at a time with the fixed bank, there are no real restrictions on how often you can swap that one segment.
Can have flash memory with a somewhat involved process to write even a single byte.
Edit: If you're familiar with mappers, it's like UNROM/UOROM: https://wiki.nesdev.com/w/index.php/UxROM except its CHR RAM can be bankswitched (4 banks) and it has double the potential PRG space. Edit2: Oh, right. And flash memory as an option.
Can swap the 512 tiles NES has access to to any one of four sets tiles quickly. (Only all 512 at once, no finer swapping like, say, MMC3).
It's CHR RAM, so runtime modifications of tiles is possible, with the usual pros and cons that comes with. (Except because it has four sets of 512 tiles in RAM at once, tile animation is less of something one has to plan around than it usually is with CHR RAM.)
Up to 512 KB. 16KB fixed (always loaded/available), the rest is divided into 16KB segments (banks). You can have one segment in memory at a time with the fixed bank, there are no real restrictions on how often you can swap that one segment.
Can have flash memory with a somewhat involved process to write even a single byte.
Edit: If you're familiar with mappers, it's like UNROM/UOROM: https://wiki.nesdev.com/w/index.php/UxROM except its CHR RAM can be bankswitched (4 banks) and it has double the potential PRG space. Edit2: Oh, right. And flash memory as an option.