diff --git a/Source/RSP/Main.cpp b/Source/RSP/Main.cpp
index ece22ff86..162e7b2c7 100644
--- a/Source/RSP/Main.cpp
+++ b/Source/RSP/Main.cpp
@@ -141,15 +141,19 @@ uint32_t AsciiToHex(char * HexValue)
 	return Value;
 }
 
-void DisplayError (char * Message, ...)
+void DisplayError(char* Message, ...)
 {
-	char Msg[400];
-	va_list ap;
+    char Msg[400];
+    va_list ap;
 
 	va_start( ap, Message );
 	vsprintf( Msg, Message, ap );
 	va_end( ap );
-	MessageBox(NULL,Msg,"Error",MB_OK|MB_ICONERROR);
+#ifdef _WIN32
+    MessageBox(NULL, Msg, "Error", MB_OK | MB_ICONERROR);
+#else
+    fputs(&Msg[0], stderr);
+#endif
 }
 
 /******************************************************************
diff --git a/Source/RSP/Rsp.h b/Source/RSP/Rsp.h
index 78cc73b00..31680500b 100644
--- a/Source/RSP/Rsp.h
+++ b/Source/RSP/Rsp.h
@@ -146,7 +146,7 @@ EXPORT void EnableDebugging(int Enabled);
 EXPORT void PluginLoaded(void);
 
 uint32_t AsciiToHex(char * HexValue);
-void DisplayError (char * Message, ...);
+void DisplayError(char * Message, ...);
 int GetStoredWinPos(char * WinName, uint32_t * X, uint32_t * Y);
 
 #define InterpreterCPU	0
diff --git a/Source/RSP/dma.c b/Source/RSP/dma.c
index 7bdd05e73..ce5647796 100644
--- a/Source/RSP/dma.c
+++ b/Source/RSP/dma.c
@@ -24,8 +24,10 @@
  *
  */
 
-#include <Windows.h>
 #include <stdio.h>
+#include <string.h>
+#include <Common/stdtypes.h>
+
 #include "Rsp.h"
 #include "RSP Registers.h"
 #include "memory.h"
@@ -34,20 +36,20 @@
 
 void SP_DMA_READ (void)
 {
-	DWORD i, j, Length, Skip, Count, End, addr;
-	BYTE *Dest, *Source;
+    uint32_t i, j, Length, Skip, Count, End, addr;
+    uint8_t *Dest, *Source;
 
     addr = (*RSPInfo.SP_DRAM_ADDR_REG) & 0x00FFFFFF;
 
 	if (addr > 0x7FFFFF)
 	{
-		MessageBox(NULL,"SP DMA READ\nSP_DRAM_ADDR_REG not in RDRam space","Error",MB_OK);
+        DisplayError("SP DMA READ\nSP_DRAM_ADDR_REG not in RDRam space");
 		return;
 	}
 	
 	if ((*RSPInfo.SP_RD_LEN_REG & 0xFFF) + 1  + (*RSPInfo.SP_MEM_ADDR_REG & 0xFFF) > 0x1000)
 	{
-		MessageBox(NULL,"SP DMA READ\ncould not fit copy in memory segment","Error",MB_OK);
+        DisplayError("SP DMA READ\ncould not fit copy in memory segment");
 		return;
 	}
 
@@ -110,20 +112,20 @@ void SP_DMA_READ (void)
 
 void SP_DMA_WRITE (void)
 {
-	DWORD i, j, Length, Skip, Count, addr;
-	BYTE *Dest, *Source;
+    uint32_t i, j, Length, Skip, Count, addr;
+    uint8_t *Dest, *Source;
 
     addr = (*RSPInfo.SP_DRAM_ADDR_REG) & 0x00FFFFFF;
 
 	if (addr > 0x7FFFFF)
 	{
-		MessageBox(NULL,"SP DMA WRITE\nSP_DRAM_ADDR_REG not in RDRam space","Error",MB_OK);
+        DisplayError("SP DMA WRITE\nSP_DRAM_ADDR_REG not in RDRam space");
 		return;
 	}
 
 	if ((*RSPInfo.SP_WR_LEN_REG & 0xFFF) + 1  + (*RSPInfo.SP_MEM_ADDR_REG & 0xFFF) > 0x1000)
 	{
-		MessageBox(NULL,"SP DMA WRITE\ncould not fit copy in memory segment","Error",MB_OK);
+        DisplayError("SP DMA WRITE\ncould not fit copy in memory segment");
 		return;
 	}