NES 2.0 Mapper 261: Difference between revisions
From NESdev Wiki
Jump to navigationJump to search
NewRisingSun (talk | contribs) mNo edit summary |
NewRisingSun (talk | contribs) mNo edit summary |
||
| Line 1: | Line 1: | ||
[[Category:Multicart mappers]] | [[Category:Multicart mappers|261]] | ||
NES 2.0 Mapper 261 was assigned by FCEUX for the ''200-in-1 - Elfland'' multicart. Its UNIF board name is '''BMC-810544-C-A1'''. | NES 2.0 Mapper 261 was assigned by FCEUX for the ''200-in-1 - Elfland'' multicart. Its UNIF board name is '''BMC-810544-C-A1'''. | ||
Revision as of 17:47, 14 July 2018
NES 2.0 Mapper 261 was assigned by FCEUX for the 200-in-1 - Elfland multicart. Its UNIF board name is BMC-810544-C-A1.
Address latch
A~1... ..PP PmpM CCCC
|| |||| ++++- Select 8 KiB CHR-ROM bank at PPU $0000-$1FFF
|| |||+------ Select nametable mirroring type
|| ||| 0: Vertical
|| ||| 1: Horizontal
|| ||+------- Lowest bit of 16 KiB PRG-ROM bank number
|| || at CPU $8000-$BFFF/$C000-$FFF in NROM-128 mode
|| |+-------- PRG-ROM banking mode
|| | 0: NROM-128 (16 KiB PRG-ROM at $8000-$BFFF, mirrored)
|| | 1: NROM-256 (32 KiB PRG-ROM at $8000-$FFFF)
++-+--------- Select 32 KiB PRG-ROM bank in NROM-256 mode/
bits 1-3 of 16 KiB PRG-ROM bank in NROM-128 mode
The first game on that multicart, Elfland, is actually a CNROM game that writes to the multicart address latch to switch CHR-ROM banks.
