diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/devices/bus/nes/mmc3.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/devices/bus/nes/mmc3.cpp b/src/devices/bus/nes/mmc3.cpp index d6f7f37dc4a..dfc57f59b71 100644 --- a/src/devices/bus/nes/mmc3.cpp +++ b/src/devices/bus/nes/mmc3.cpp @@ -283,7 +283,8 @@ void nes_txrom_device::txrom_write(offs_t offset, uint8_t data) break; case 0x2000: - set_nt_mirroring(BIT(data, 0) ? PPU_MIRROR_HORZ : PPU_MIRROR_VERT); + if (m_mirroring != PPU_MIRROR_4SCREEN) + set_nt_mirroring(BIT(data, 0) ? PPU_MIRROR_HORZ : PPU_MIRROR_VERT); break; case 0x2001: |
