diff --git a/src/emu/debug/dvmemory.cpp b/src/emu/debug/dvmemory.cpp
index 63c2f445b30..fd27ca40abd 100644
--- a/src/emu/debug/dvmemory.cpp
+++ b/src/emu/debug/dvmemory.cpp
@@ -464,14 +464,16 @@ void debug_view_memory::view_char(int chval)
 			if (hexchar == nullptr)
 				break;
 
+			const debug_view_memory_source &source = downcast<const debug_view_memory_source &>(*m_source);
+			offs_t address = (source.m_space != nullptr) ? source.m_space->byte_to_address(pos.m_address) : pos.m_address;
 			u64 data;
-			bool ismapped = read(m_bytes_per_chunk, pos.m_address, data);
+			bool ismapped = read(m_bytes_per_chunk, address, data);
 			if (!ismapped)
 				break;
 
 			data &= ~(u64(0x0f) << pos.m_shift);
 			data |= u64(hexchar - hexvals) << pos.m_shift;
-			write(m_bytes_per_chunk, pos.m_address, data);
+			write(m_bytes_per_chunk, address, data);
 			// fall through to the right-arrow press
 		}