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| [[Category:ASIC_mappers]]
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| '''Subor''' is a company in Zhongshan, China, making NES clones with keyboards.
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| Subor famiclones are reportedly the second most popular famiclone brand in Russia next to Dendy, and one may be the base for the playpower.org project.
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| A mapper used in Subor releases uses a glob that provides 16KB PRG banks swappable at $8000 and $C000.
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| The [[iNES]] format assigns mappers [[iNES Mapper 166|166]] and [[iNES Mapper 167|167]] to these boards.
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| == Overview ==
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| == Banks ==
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| == Registers ==
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| Nestopia and FCEUX implement mappers 166 and 167 as follows:
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| === Outer bank ($8000-$9FFF) ===
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| 7 bit 0
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| ...B ....
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| +------ XORed with B from Mode below, selects 512KiB outer bank
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| === Mode ($A000-$BFFF) ===
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| 7 bit 0
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| ...B MM..
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| | ++--- Banking mode:
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| | 0- 512 KiB UNROM
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| | 4- 512 KiB inverted UNROM (mapper 180)
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| | 8,C- 32 KiB NROM
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| +------ XORed with B from Outer bank above, selects 512 KiB outer bank
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| The source of the fixed bank '''ignores the outer bank''', and varies depending on mapper number:
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| {| class="tabular" | |
| | colspan=2| || colspan=2|Mode
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| |-
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| | colspan=2| || 0 || 4
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| |-
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| | rowspan=2|Mapper # || 166 || upper bank fixed to 7 || rowspan=2|lower bank fixed to 0x1F
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| |-
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| | 167 || upper bank fixed to 0x20
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| |}
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| The 32 KiB NROM mode ignores the LSB of the 6 bit sum of inner and outer banks, selecting one of 32 different possible slices. However, for mapper 167, the upper and lower halves are '''reversed'''.
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| === Inner bank 1 ($C000-$DFFF) ===
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| 7 bit 0
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| ...b bbbb
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| +-++++- XORed with Inner bank 2 below, selects 16KiB inner bank
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| === Inner bank 2 ($E000-$FFFF) ===
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| 7 bit 0
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| ...b bbbb
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| +-++++- XORed with Inner bank 1 above, selects 16KiB inner bank
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| == References ==
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| *[http://bootleggames.wikia.com/wiki/Subor Subor on BootlegGames Wiki]
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