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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.
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| It is only well-defined for 512KiB PRG, 32 KiB CHR-RAM, and 4-screen nametables.
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| Mask: $D000
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| $5000: [grnc pppp]
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| |||| ++++- Select 32 KiB PRG at CPU $8000-$FFFF
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| |||+------ Select 8 KiB CHR RAM at PPU $0000-$1FFF
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| ||+------- Select 8 KiB nametable and scratch RAM at PPU $2000-$3EFF
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| |+-------- 0: red LED is lit, 1: off
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| +--------- 0: green LED is lit, 1: off
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| 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.
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| The specific hardware on this board is a [[74377]], a [[7402]], and a [[7410]]. The exact connectivity is not known, but the functions evaluated by the logic must include:
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| * CHRRAMA14 = if (PPUA13==1) { n } else { c }
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| * PRGROM/OE = NOT(R/W)
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| * Latch on M2, /ROMSEL, A14, A12 high, and maybe on R/W low
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| Information: [http://forums.nesdev.org/viewtopic.php?p=146039 Membler Industries in 2015] - forum post describing the board.
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