INES Mapper 020: Difference between revisions
From NESdev Wiki
Jump to navigationJump to search
No edit summary |
m (then it isn't really used for carts and is thus categorized as "bad" per the definition in Mapper) |
||
| Line 1: | Line 1: | ||
[[Category:iNES Mappers|020]] | [[Category:iNES Mappers|020]][[Category:Bad iNES Mappers|020]] | ||
Mapper 20 is defined as reserved for the Famicom Disk System ([[FDS]]) in official [[iNES]] specs. | Mapper 20 is defined as reserved for the Famicom Disk System ([[FDS]]) in official [[iNES]] specs. | ||
Ie. the mapper number is mostly intended for being internally used by emulators (to indicate to themselves that they are emulating the FDS hardware). | Ie. the mapper number is mostly intended for being internally used by emulators (to indicate to themselves that they are emulating the FDS hardware). | ||
The mapper number could be theoretically used for the FDS BIOS ROM-image, but this isn't done in practice. The FDS BIOS is typically assingned as [[NROM]] (if it is dumped in [[iNES]] format), or it's stored as raw BIOS dump (without iNES header and without mapper number). | The mapper number could be theoretically used for the FDS BIOS ROM-image, but this isn't done in practice. The FDS BIOS is typically assingned as [[NROM]] (if it is dumped in [[iNES]] format), or it's stored as raw BIOS dump (without iNES header and without mapper number). | ||
Revision as of 16:46, 15 October 2012
Mapper 20 is defined as reserved for the Famicom Disk System (FDS) in official iNES specs. Ie. the mapper number is mostly intended for being internally used by emulators (to indicate to themselves that they are emulating the FDS hardware).
The mapper number could be theoretically used for the FDS BIOS ROM-image, but this isn't done in practice. The FDS BIOS is typically assingned as NROM (if it is dumped in iNES format), or it's stored as raw BIOS dump (without iNES header and without mapper number).
