INES Mapper 111: Difference between revisions

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(note about self-flash)
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#REDIRECT [[GTROM]]
{{DEFAULTSORT:111}}[[Category:iNES Mappers]][[Category:GNROM-like mappers]][[Category:Mappers using $4020-$5FFF]]
{{DEFAULTSORT:111}}[[Category:iNES Mappers]][[Category:GNROM-like mappers]][[Category:Mappers using $4020-$5FFF]]
Mapper 111 is used by Memblers' Cheapocabra GT-ROM 512k self-flashable board.
It is only well-defined for 512KiB PRG, 32 KiB CHR-RAM, and 4-screen nametables.
Mask: $D000
$5000: [grnc pppp]
        |||| ||||
        |||| ++++- Select 32 KiB PRG at CPU $8000-$FFFF
        |||+------ Select 8 KiB CHR RAM at PPU $0000-$1FFF
        ||+------- Select 8 KiB nametable and scratch RAM at PPU $2000-$3EFF
        |+-------- 0: red LED is lit, 1: off
        +--------- 0: green LED is lit, 1: off
Like [[iNES Mapper 030]], the specific flash used on this board is the SST39SF040. Games are expected to use the chip's self-erase and self-write abilities for game saves.
Information: [http://forums.nesdev.org/viewtopic.php?p=146039 Membler Industries in 2015] - forum post describing the board.

Latest revision as of 03:50, 10 October 2017

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