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-rw-r--r--src/devices/cpu/sh/sh2.cpp4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/devices/cpu/sh/sh2.cpp b/src/devices/cpu/sh/sh2.cpp
index d38d8dcc6a8..e00c0e60c57 100644
--- a/src/devices/cpu/sh/sh2.cpp
+++ b/src/devices/cpu/sh/sh2.cpp
@@ -134,8 +134,8 @@ void sh2_device::sh7604_map(address_map &map)
// map(0xe0000000, 0xe00001ff).mirror(0x1ffffe00).rw(FUNC(sh2_device::sh7604_r), FUNC(sh2_device::sh7604_w));
// TODO: internal map takes way too much resources if mirrored with 0x1ffffe00
// we eventually internalize again via trampoline & sh7604_device
- // additionally SH7604 doc mentions that there's a DRAM located at 0xffff8000,
- // so this is not a full mirror? (needs confirmation)
+ // Also area 0xffff8000-0xffffbfff is for synchronous DRAM mode,
+ // so this isn't actually a full mirror
// SCI
map(0xfffffe00, 0xfffffe00).rw(FUNC(sh2_device::smr_r), FUNC(sh2_device::smr_w));
map(0xfffffe01, 0xfffffe01).rw(FUNC(sh2_device::brr_r), FUNC(sh2_device::brr_w));