diff --git a/source/Debugger/Debug.cpp b/source/Debugger/Debug.cpp
index 85426bd37..1a08edca1 100644
--- a/source/Debugger/Debug.cpp
+++ b/source/Debugger/Debug.cpp
@@ -8391,7 +8391,7 @@ void DebugContinueStepping(const bool bCallerWillUpdateDisplay/*=false*/)
 			else if (g_bDebugBreakpointHit & BP_HIT_INTERRUPT)
 				sprintf_s(szStopMessage, sizeof(szStopMessage), "Interrupt occurred at $%04X", g_LBR);
 			else if (g_bDebugBreakpointHit & BP_DMA_TO_IO_MEM)
-				sprintf_s(szStopMessage, sizeof(szStopMessage), "HDD DMA to I/O memory $%04X", g_uDebugBreakOnDmaIoMemoryAddr);
+				sprintf_s(szStopMessage, sizeof(szStopMessage), "HDD DMA to I/O memory or ROM $%04X", g_uDebugBreakOnDmaIoMemoryAddr);
 			else if (g_bDebugBreakpointHit & BP_DMA_FROM_IO_MEM)
 				sprintf_s(szStopMessage, sizeof(szStopMessage), "HDD DMA from I/O memory $%04X", g_uDebugBreakOnDmaIoMemoryAddr);
 			else
diff --git a/source/Harddisk.cpp b/source/Harddisk.cpp
index 6c36ebe57..4da7d6d1a 100644
--- a/source/Harddisk.cpp
+++ b/source/Harddisk.cpp
@@ -519,7 +519,7 @@ BYTE __stdcall HarddiskInterfaceCard::IORead(WORD pc, WORD addr, BYTE bWrite, BY
 								{
 									memdirty[dstAddr >> 8] = 0xFF;
 									LPBYTE page = memwrite[dstAddr >> 8];
-									if (!page)
+									if (!page)	// I/O space or ROM
 									{
 										if (g_nAppMode == MODE_STEPPING)
 											DebuggerBreakOnDmaToOrFromIoMemory(dstAddr, true);	//  GH#1007