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| [[Category:iNES Mappers]] | | #REDIRECT [[UxROM]] |
| | | {{DEFAULTSORT:002}}[[Category:iNES Mappers]][[Category:in NesCartDB]] |
| [[iNES Mapper 002]] is used to designate the most common configuration of the [[UxROM]] boardset, generalized to support up to 2048 KB of PRG ROM (iNES) or 4096 KB of PRG ROM ([[NES 2.0]]). | |
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| Here are Disch's original notes:
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| ========================
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| = Mapper 002 =
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| ========================
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|
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| aka
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| --------------------------
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| UxROM (and compatible)
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| Example Games:
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| --------------------------
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| Mega Man
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| Castlevania
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| Contra
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| Duck Tales
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| Metal Gear
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| Notes:
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| ---------------------------
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| UxROM has bus conflicts, however mapper 002 is meant to be UxROM and compatible. So some mappers which were
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| similar in function, but did not have bus conflicts are included.
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| Additionally, UxROM does not have an 8 bit reg. UNROM is capped at 128k PRG, and UOROM is capped at 256k.
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| So to be "safe":
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| - for homebrewing: assume bus conflicts, do not exceed 256k
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| - for emudev: assume no bus conflicts, use all 8 PRG reg bits
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| There is no CHR swapping. Every mapper 002 game I've ever seen has CHR-RAM.
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| Registers (**BUS CONFLICTS** sometimes):
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| --------------------------
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| $8000-FFFF: [PPPP PPPP]
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| PRG Reg
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| PRG Setup:
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| --------------------------
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| $8000 $A000 $C000 $E000
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| +---------------+---------------+
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| | $8000 | { -1} |
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| +---------------+---------------+
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