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-rw-r--r--src/mame/machine/megadriv.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/machine/megadriv.cpp b/src/mame/machine/megadriv.cpp
index f87c8e73919..ee96f0d1f17 100644
--- a/src/mame/machine/megadriv.cpp
+++ b/src/mame/machine/megadriv.cpp
@@ -463,7 +463,7 @@ void md_base_state::megadriv_map(address_map &map)
map(0xc00000, 0xc0001f).rw(m_vdp, FUNC(sega315_5313_device::vdp_r), FUNC(sega315_5313_device::vdp_w));
map(0xd00000, 0xd0001f).rw(m_vdp, FUNC(sega315_5313_device::vdp_r), FUNC(sega315_5313_device::vdp_w)); // the earth defend
map(0xe00000, 0xe0ffff).ram().mirror(0x1f0000).share("megadrive_ram");
-// AM_RANGE(0xff0000, 0xffffff) AM_READONLY
+// map(0xff0000, 0xffffff).readonly();
/* 0xe00000 - 0xffffff) == MAIN RAM (64kb, Mirrored, most games use ff0000 - ffffff) */
}