INES Mapper 177: Difference between revisions
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[[Category:Mappers with CHR RAM]]iNES Mapper 177 is used for games from 恒格电子 (Hénggé Diànzǐ). It's basically oversize [[BNROM]] without bus conflicts, with an additional mirroring control, and with 8 KiB of battery-backed WRAM at CPU $6000-$7FFF. | {{DEFAULTSORT:177}}[[Category:Mappers with CHR RAM]]iNES Mapper 177 is used for games from 恒格电子 (Hénggé Diànzǐ). It's basically oversize [[BNROM]] without bus conflicts, with an additional mirroring control, and with 8 KiB of battery-backed WRAM at CPU $6000-$7FFF. | ||
7 bit 0 | 7 bit 0 | ||
Latest revision as of 19:32, 24 April 2019
iNES Mapper 177 is used for games from 恒格电子 (Hénggé Diànzǐ). It's basically oversize BNROM without bus conflicts, with an additional mirroring control, and with 8 KiB of battery-backed WRAM at CPU $6000-$7FFF.
7 bit 0
---------
$8000-FFFF: ..MP PPPP
|+-++++- Select 32 KiB PRG-ROM bank at CPU $8000-$FFFF
+------- Select nametable mirroring
0: Vertical
1: Horizontal
Some Hengedianzi games use hard-wired mirroring and do not set the M bit correctly; they are set to INES Mapper 241 instead.
