NES 2.0 Mapper 340: Difference between revisions
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A~FEDC BA98 7654 3210 D~7654 3210 | A~FEDC BA98 7654 3210 D~7654 3210 | ||
------------------- ---- ---- | ------------------- ---- ---- | ||
.... .... ..MO | .... .... ..MO OmIm .... .III | ||
|| || | +++- Select 16 KiB inner PRG-ROM bank at CPU $8000-$BFFF in UNROM mode | || || | +++- Select 16 KiB inner PRG-ROM bank at CPU $8000-$BFFF in UNROM mode | ||
|| |+++- Select 16 KiB inner PRG-ROM bank at CPU $8000-$BFFF/$C000-$FFFF in NROM-128 mode | |||
|+-+|-|- Select 128 KiB outer PRG-ROM bank at CPU $8000-$FFFF | |+-+|-|- Select 128 KiB outer PRG-ROM bank at CPU $8000-$FFFF | ||
+---|-|- Select $C000-$FFFF behavior | +---|-|- Select $C000-$FFFF behavior | ||
Revision as of 20:10, 6 April 2019
NES 2.0 mapper 340 is used for a 35-in-1 multicart. Its UNIF board name is BMC-K-3036.
Banks
- CPU $8000-$BFFF: Switchable 16 KiB inner PRG-ROM bank and switchable 128 KiB outer PRG-ROM bank
- CPU $C000-$FFFF: Fixed 16 KiB inner PRG-ROM bank #7/Mirror of $8000-$BFFF and switchable 128 KiB outer PRG-ROM bank
- PPU $0000-$1FFF: Unbanked 8 KiB CHR-RAM
Address/Data Latch ($8000-$FFFF)
Mask: $8000
A~FEDC BA98 7654 3210 D~7654 3210
------------------- ---- ----
.... .... ..MO OmIm .... .III
|| || | +++- Select 16 KiB inner PRG-ROM bank at CPU $8000-$BFFF in UNROM mode
|| |+++- Select 16 KiB inner PRG-ROM bank at CPU $8000-$BFFF/$C000-$FFFF in NROM-128 mode
|+-+|-|- Select 128 KiB outer PRG-ROM bank at CPU $8000-$FFFF
+---|-|- Select $C000-$FFFF behavior
| | | 0: UNROM (Inner Bank forced to #7 at CPU $C000-$FFFF)
| | | 1: NROM-128 (CPU $C000-$FFFF mirror of $8000-$BFFF)
+---+-+- Select nametable mirroring type
0x25: Horizontal
all others: Vertical
