Difference between revisions of "INES Mapper 020"

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[[Category:iNES Mappers|020]]
 
[[Category:iNES Mappers|020]]
Mapper 20 is used for the Famicom Disk System ([[FDS]]) BIOS ROM-image (if it is dumped in [[iNES]] format; there are also raw BIOS dumps without iNES header).
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Mapper 20 is defined as reserved for the Famicom Disk System ([[FDS]]) in official [[iNES]] specs.
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Ie. the mapper number is mostly intended for being internally used by emulators (to indicate to themselves that they are emulating the FDS hardware).
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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 10:15, 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).