diff --git a/Src/Model3/Model3.cpp b/Src/Model3/Model3.cpp
index d1554ab..fd80b72 100644
--- a/Src/Model3/Model3.cpp
+++ b/Src/Model3/Model3.cpp
@@ -984,9 +984,9 @@ UINT8 CModel3::Read8(UINT32 addr)
       if (addr > 0xc00101ff)
       {
         printf("R8 ATTENTION OUT OF RANGE\n");
-        MessageBox(NULL, "Out of Range", NULL, MB_OK);
+        SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Out of Range", NULL);
       }
-      printf("R8 ioreg @%x=%x\n", (addr & 0x1FF), netBuffer[0x10000 + ((addr & 0x1FF) / 2)]);
+      //printf("R8 ioreg @%x=%x\n", (addr & 0x1FF), netBuffer[0x10000 + ((addr & 0x1FF) / 2)]);
       return netBuffer[0x10000 + ((addr & 0x1FF) / 2)];
 
     case 2:
@@ -994,7 +994,7 @@ UINT8 CModel3::Read8(UINT32 addr)
       if (addr > 0xc002ffff)
       {
         printf("R8 ATTENTION OUT OF RANGE\n");
-        MessageBox(NULL, "Out of Range", NULL, MB_OK);
+        SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Out of Range", NULL);
       }
       //printf("R8 netram @%x=%x\n", (addr & 0x1FFFF), netRAM[addr & 0x1ffff]);
       return netRAM[((addr & 0x1FFFF) / 2)];
@@ -1004,7 +1004,7 @@ UINT8 CModel3::Read8(UINT32 addr)
     
     default:
       printf("R8 ATTENTION OUT OF RANGE\n");
-      MessageBox(NULL, "Out of Range", NULL, MB_OK);
+      SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Out of Range", NULL);
       break;
     }
   }
@@ -1130,7 +1130,7 @@ UINT16 CModel3::Read16(UINT32 addr)
   default:
 #ifdef NET_BOARD
     printf("CMODEL3 : unknown R16 : %x (%x)\n", addr, addr >> 24);
-    MessageBox(NULL, "CMODEL3 : Unknown R16", NULL, MB_OK);
+    SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "CMODEL3 : Unknown R16", NULL);
 #endif
     break;
   }
@@ -1297,10 +1297,10 @@ UINT32 CModel3::Read32(UINT32 addr)
 
         UINT32 test;
         test = (*(UINT32 *)&netBuffer[0x10000 + ((addr & 0x1FF) / 2)]);
-        if (((FLIPENDIAN32(test) & 0x00ff0000) != 0x00900000) && ((FLIPENDIAN32(test) & 0x00ff0000) != 0x00a00000) && ((FLIPENDIAN32(test) & 0x00ff0000) != 0x00b00000) && ((FLIPENDIAN32(test) & 0x00ff0000) != 0x00800000) && ((FLIPENDIAN32(test) & 0x00ff0000) != 0x00f00000)) 
+        /*if (((FLIPENDIAN32(test) & 0x00ff0000) != 0x00900000) && ((FLIPENDIAN32(test) & 0x00ff0000) != 0x00a00000) && ((FLIPENDIAN32(test) & 0x00ff0000) != 0x00b00000) && ((FLIPENDIAN32(test) & 0x00ff0000) != 0x00800000) && ((FLIPENDIAN32(test) & 0x00ff0000) != 0x00f00000)) 
         {
-          printf("R32 ioreg @%x=%04x\n", (addr /*& 0x1FF*/), FLIPENDIAN32(test) >> 16);
-        }
+          printf("R32 ioreg @%x=%04x\n", (addr), FLIPENDIAN32(test) >> 16);
+        }*/
         result = (*(UINT32 *)&netBuffer[0x10000 + ((addr & 0x1FF) / 2)]) & 0x0000ffff;
         return FLIPENDIAN32(result);
 
@@ -1469,7 +1469,7 @@ void CModel3::Write8(UINT32 addr, UINT8 data)
           printf("W8 ATTENTION OUT OF RANGE\n");
         }
 
-        printf("W8 ioreg @%x<-%x\n", (addr & 0x1FF), data);
+        //printf("W8 ioreg @%x<-%x\n", (addr & 0x1FF), data);
         *(UINT8 *)&netBuffer[0x10000 + ((addr & 0x1FF) / 2)] = data;
         break;
 
@@ -1812,7 +1812,7 @@ void CModel3::Write32(UINT32 addr, UINT32 data)
           printf("W32 ATTENTION OUT OF RANGE\n");
         }
 
-        printf("W32 ioreg @%x<-%04x\n", (addr /*& 0x1FF*/), data>>16);
+        //printf("W32 ioreg @%x<-%04x\n", (addr /*& 0x1FF*/), data>>16);
         *(UINT16 *)&netBuffer[0x10000 + ((addr & 0x1FF) / 2)] = FLIPENDIAN16(data >> 16);
         break;
 
diff --git a/Src/Network/NetBoard.cpp b/Src/Network/NetBoard.cpp
index 998ed34..a840b6f 100644
--- a/Src/Network/NetBoard.cpp
+++ b/Src/Network/NetBoard.cpp
@@ -149,8 +149,7 @@ UINT8 CNetBoard::Read8(UINT32 a)
 		if (a > 0x0ffff)
 		{
 			printf("OUT OF RANGE RAM[%x]\n", a);
-			MessageBox(NULL, "Out of Range", NULL, MB_OK);
-			//MessageBeep(MB_ICONWARNING);
+			SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Out of Range", NULL);
 		}
 		return RAM[a];
 
@@ -159,8 +158,7 @@ UINT8 CNetBoard::Read8(UINT32 a)
 		if ((a & 0xfff) > 0xff)
 		{
 			printf("OUT OF RANGE ctrlrw[%x]\n", a);
-			MessageBox(NULL, "Out of Range", NULL, MB_OK);
-			//MessageBeep(MB_ICONWARNING);
+			SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Out of Range", NULL);
 		}
 		switch (a & 0xff)
 		{
@@ -171,8 +169,7 @@ UINT8 CNetBoard::Read8(UINT32 a)
 
 		default:
 			printf("unknown 400(%x)\n", a & 0xff);
-			MessageBox(NULL, "Unknown R8 CTRLRW", NULL, MB_OK);
-			//MessageBeep(MB_ICONWARNING);
+			SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Unknown R8 CTRLRW", NULL);
 			return ctrlrw[a&0xff];
 			break;
 
@@ -184,8 +181,7 @@ UINT8 CNetBoard::Read8(UINT32 a)
 		if ((a & 0x3ffff) > 0xffff)
 		{
 			printf("OUT OF RANGE CommRAM[%x]\n", a);
-			MessageBox(NULL, "Out of Range", NULL, MB_OK);
-			//MessageBeep(MB_ICONWARNING);
+			SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Out of Range", NULL);
 		}
 		return CommRAM[a & 0xffff];
 
@@ -194,8 +190,7 @@ UINT8 CNetBoard::Read8(UINT32 a)
 		if ((a & 0xfff) > 0xff)
 		{
 			printf("OUT OF RANGE ioreg[%x]\n", a);
-			MessageBox(NULL, "Out of Range", NULL, MB_OK);
-			//MessageBeep(MB_ICONWARNING);
+			SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Out of Range", NULL);
 		}
 
 		switch (a & 0xff)
@@ -234,8 +229,7 @@ UINT8 CNetBoard::Read8(UINT32 a)
 
 		default:
 			printf("unknown c00(%x)\n", a & 0xff);
-			//MessageBeep(MB_ICONWARNING);
-			MessageBox(NULL, "Unknown R8 IOREG", NULL, MB_OK);
+			SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Unknown R8 IOREG", NULL);
 			return ioreg[a&0xff];
 			break;
 
@@ -244,8 +238,7 @@ UINT8 CNetBoard::Read8(UINT32 a)
 
 	default:
 		printf("NetBoard 68K: Unknown R8 (%02X) addr=%x\n", (a >> 16) & 0xF,a&0x0fffff);
-		//MessageBeep(MB_ICONWARNING);
-		MessageBox(NULL, "Unknown R8", NULL, MB_OK);
+		SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Unknown R8", NULL);
 		break;
 	}
 
@@ -262,8 +255,7 @@ UINT16 CNetBoard::Read16(UINT32 a)
 		if (a > 0x0ffff)
 		{
 			printf("OUT OF RANGE RAM[%x]\n", a);
-			//MessageBeep(MB_ICONWARNING);
-			MessageBox(NULL, "Out of Range", NULL, MB_OK);
+			SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Out of Range", NULL);
 		}
 		result = *(UINT16 *)&RAM[a];
 		return result;
@@ -273,8 +265,7 @@ UINT16 CNetBoard::Read16(UINT32 a)
 		if ((a & 0xfff) > 0xff)
 		{
 			printf("OUT OF RANGE ctrlrw[%x]\n", a);
-			//MessageBeep(MB_ICONWARNING);
-			MessageBox(NULL, "Out of Range", NULL, MB_OK);
+			SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Out of Range", NULL);
 		}
 
 		switch (a & 0xff)
@@ -288,8 +279,7 @@ UINT16 CNetBoard::Read16(UINT32 a)
 		default:
 			result = *(UINT16 *)&ctrlrw[a & 0xff];
 			printf("unknown 400(%x)\n", a & 0xff);
-			MessageBox(NULL, "Unknown R16 CTRLRW", NULL, MB_OK);
-			//MessageBeep(MB_ICONWARNING);
+			SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Unknown R16 CTRLRW", NULL);
 			return result;
 			break;
 
@@ -300,8 +290,7 @@ UINT16 CNetBoard::Read16(UINT32 a)
 		if ((a & 0x3ffff) > 0xffff)
 		{
 			printf("OUT OF RANGE CommRAM[%x]\n", a);
-			//MessageBeep(MB_ICONWARNING);
-			MessageBox(NULL, "Out of Range", NULL, MB_OK);
+			SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Out of Range", NULL);
 		}
 		result = *(UINT16 *)&CommRAM[a & 0xffff];
 		return result;
@@ -311,8 +300,7 @@ UINT16 CNetBoard::Read16(UINT32 a)
 		if ((a & 0xfff) > 0xff)
 		{
 			printf("OUT OF RANGE ioreg[%x]\n", a);
-			MessageBox(NULL, "Out of Range", NULL, MB_OK);
-			//MessageBeep(MB_ICONWARNING);
+			SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Out of Range", NULL);
 		}
 
 		switch (a & 0xff)
@@ -330,15 +318,13 @@ UINT16 CNetBoard::Read16(UINT32 a)
 		default:
 			result = *(UINT16 *)&ioreg[a & 0xff];
 			printf("unknown c00(%x)\n", a & 0xff);
-			MessageBox(NULL, "Unknown R16 IOREG", NULL, MB_OK);
-			//MessageBeep(MB_ICONWARNING);
+			SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Unknown R16 IOREG", NULL);
 			return result;
 		}
 
 	default:
 		printf("NetBoard 68K: Unknown R16 %02X addr=%x\n", (a >> 16) & 0xF,a&0x0fffff);
-		//MessageBeep(MB_ICONWARNING);
-		MessageBox(NULL, "Unknown R16", NULL, MB_OK);
+		SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Unknown R16", NULL);
 		break;
 	}
 
@@ -357,8 +343,7 @@ UINT32 CNetBoard::Read32(UINT32 a)
 		if (a > 0x0ffff)
 		{
 			printf("OUT OF RANGE RAM[%x]\n", a);
-			//MessageBeep(MB_ICONWARNING);
-			MessageBox(NULL, "Out of Range", NULL, MB_OK);
+			SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Out of Range", NULL);
 		}
 		//printf("Netboard R32\tRAM[%x]=%x\n", a,(hi << 16) | lo);
 		result = (hi << 16) | lo;
@@ -371,7 +356,6 @@ UINT32 CNetBoard::Read32(UINT32 a)
 		{
 			printf("OUT OF RANGE ctrlrw[%x]\n", a);
 			MessageBox(NULL, "Out of Range", NULL, MB_OK);
-			//MessageBeep(MB_ICONWARNING);
 		}
 		printf("Netboard R32\tctrlrw[%x]=%x\n", a, (hi << 16) | lo);
 		result = (hi << 16) | lo;
@@ -383,8 +367,7 @@ UINT32 CNetBoard::Read32(UINT32 a)
 		if ((a & 0x3ffff) > 0xffff)
 		{
 			printf("OUT OF RANGE CommRAM[%x]\n", a);
-			MessageBox(NULL, "Out of Range", NULL, MB_OK);
-			//MessageBeep(MB_ICONWARNING);
+			SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Out of Range", NULL);
 		}
 		//if (((a & 0xffff) > 0 && (a & 0xffff) < 0xff) || ((a & 0xffff) > 0xefff && (a & 0xffff) < 0xffff)) printf("Netboard R32\tCommRAM[%x] = %x\n", a & 0xffff, (hi << 16) | lo);
 		result = (hi << 16) | lo;
@@ -397,7 +380,6 @@ UINT32 CNetBoard::Read32(UINT32 a)
 		{
 			printf("OUT OF RANGE ioreg[%x]\n", a);
 			MessageBox(NULL, "Out of Range", NULL, MB_OK);
-			//MessageBeep(MB_ICONWARNING);
 		}
 		printf("Netboard R32\tioreg[%x]=%x\n", a, (hi << 16) | lo);
 		result = (hi << 16) | lo;
@@ -405,8 +387,7 @@ UINT32 CNetBoard::Read32(UINT32 a)
 
 	default:
 		printf("NetBoard 68K: Unknown R32 (%02X) a=%x\n", (a >> 16) & 0xF, a & 0xffff);
-		//MessageBeep(MB_ICONWARNING);
-		MessageBox(NULL, "Unknown R32", NULL, MB_OK);
+		SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Unknown R32", NULL);
 		break;
 	}
 
@@ -422,8 +403,7 @@ void CNetBoard::Write8(UINT32 a, UINT8 d)
 		if (a > 0x0ffff)
 		{
 			printf("OUT OF RANGE RAM[%x]\n", a);
-			//MessageBeep(MB_ICONWARNING);
-			MessageBox(NULL, "Out of Range", NULL, MB_OK);
+			SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Out of Range", NULL);
 		}
 		RAM[a] = d;
 		break;
@@ -433,8 +413,7 @@ void CNetBoard::Write8(UINT32 a, UINT8 d)
 		if ((a & 0xfff) > 0xff)
 		{
 			printf("OUT OF RANGE ctrlrw[%x]\n", a);
-			MessageBox(NULL, "Out of Range", NULL, MB_OK);
-			//MessageBeep(MB_ICONWARNING);
+			SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Out of Range", NULL);
 		}
 
 		switch (a & 0xff)
@@ -465,8 +444,7 @@ void CNetBoard::Write8(UINT32 a, UINT8 d)
 		default:
 			printf("unknown 400(%x)\n", a & 0xff);
 			ctrlrw[a & 0xff] = d;
-			MessageBox(NULL, "Unknown W8 CTRLRW", NULL, MB_OK);
-			//MessageBeep(MB_ICONWARNING);
+			SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Unknown W8 CTRLRW", NULL);
 			break;
 
 		}
@@ -478,8 +456,7 @@ void CNetBoard::Write8(UINT32 a, UINT8 d)
 		if ((a & 0x3ffff) > 0xffff)
 		{
 			printf("OUT OF RANGE CommRAM[%x]\n", a);
-			MessageBox(NULL, "Out of Range", NULL, MB_OK);
-			//MessageBeep(MB_ICONWARNING);
+			SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Out of Range", NULL);
 		}
 		CommRAM[a & 0xffff] = d;
 		break;
@@ -489,8 +466,7 @@ void CNetBoard::Write8(UINT32 a, UINT8 d)
 		if ((a & 0xfff) > 0xff)
 		{
 			printf("OUT OF RANGE ioreg[%x]\n", a);
-			MessageBox(NULL, "Out of Range", NULL, MB_OK);
-			//MessageBeep(MB_ICONWARNING);
+			SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Out of Range", NULL);
 		}
 
 		switch (a & 0xff)
@@ -923,8 +899,7 @@ void CNetBoard::Write8(UINT32 a, UINT8 d)
 		default:
 			printf("unknown c00(%x)\n", a & 0xff);
 			ioreg[a & 0xff] = d;
-			MessageBox(NULL, "Unknown W8 IOREG", NULL, MB_OK);
-			//MessageBeep(MB_ICONWARNING);
+			SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Unknown W8 IOREG", NULL);
 			break;
 
 		}
@@ -934,8 +909,7 @@ void CNetBoard::Write8(UINT32 a, UINT8 d)
 
 	default:
 		printf("NetBoard 68K: Unknown W8 (%x) %06X<-%02X\n", (a >> 16) & 0xF, a, d);
-		MessageBox(NULL, "Unknown W8", NULL, MB_OK);
-		//MessageBeep(MB_ICONWARNING);
+		SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Unknown W8", NULL);
 		break;
 	}
 }
@@ -949,8 +923,7 @@ void CNetBoard::Write16(UINT32 a, UINT16 d)
 		if (a > 0x0ffff)
 		{
 			printf("OUT OF RANGE RAM[%x]\n", a);
-			MessageBox(NULL, "Out of Range", NULL, MB_OK);
-			//MessageBeep(MB_ICONWARNING);
+			SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Out of Range", NULL);
 		}
 		*(UINT16 *)&RAM[a] = d;
 		break;
@@ -960,8 +933,7 @@ void CNetBoard::Write16(UINT32 a, UINT16 d)
 		if ((a & 0xfff) > 0xff)
 		{
 			printf("OUT OF RANGE ctrlrw[%x]\n", a);
-			MessageBox(NULL, "Out of Range", NULL, MB_OK);
-			//MessageBeep(MB_ICONWARNING);
+			SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Out of Range", NULL);
 		}
 
 		switch (a & 0xff)
@@ -1017,8 +989,7 @@ void CNetBoard::Write16(UINT32 a, UINT16 d)
 		default:
 			*(UINT16 *)&ctrlrw[a & 0xff] = d;
 			printf("unknown 400(%x)\n", a & 0xff);
-			MessageBox(NULL, "Unknown W16 CTRLRW", NULL, MB_OK);
-			//MessageBeep(MB_ICONWARNING);
+			SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Unknown W16 CTRLRW", NULL);
 			break;
 
 		}
@@ -1029,8 +1000,7 @@ void CNetBoard::Write16(UINT32 a, UINT16 d)
 		if ((a & 0x3ffff) > 0xffff)
 		{
 			printf("OUT OF RANGE CommRAM[%x]\n", a);
-			MessageBox(NULL, "Out of Range", NULL, MB_OK);
-			//MessageBeep(MB_ICONWARNING);
+			SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Out of Range", NULL);
 		}
 		*(UINT16 *)&CommRAM[a & 0xffff] = d;
 		break;
@@ -1040,8 +1010,7 @@ void CNetBoard::Write16(UINT32 a, UINT16 d)
 		if ((a & 0xfff) > 0xff)
 		{
 			printf("OUT OF RANGE ioreg[%x]\n", a);
-			MessageBox(NULL, "Out of Range", NULL, MB_OK);
-			//MessageBeep(MB_ICONWARNING);
+			SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Out of Range", NULL);
 		}
 
 		switch (a & 0xff)
@@ -1071,7 +1040,6 @@ void CNetBoard::Write16(UINT32 a, UINT16 d)
 				DPRINTF("d=%x\n", d);
 				*(UINT16 *)&ioreg[a & 0xff] = d;
 				//MessageBox(NULL, "d > 1", NULL, MB_OK);
-				//MessageBeep(MB_ICONWARNING);
 			}
 
 			DPRINTF("d = %x \n",d);
@@ -1089,8 +1057,7 @@ void CNetBoard::Write16(UINT32 a, UINT16 d)
 
 		default:
 			printf("unknown c00(%x)\n", a & 0xff);
-			MessageBox(NULL, "Unknown W16 IOREG", NULL, MB_OK);
-			//MessageBeep(MB_ICONWARNING);
+			SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Unknown W16 IOREG", NULL);
 			break;
 
 		}
@@ -1100,8 +1067,7 @@ void CNetBoard::Write16(UINT32 a, UINT16 d)
 
 	default:
 		printf("NetBoard 68K: Unknown W16 (%x) %06X<-%04X\n", (a >> 16) & 0xF,a, d);
-		MessageBox(NULL, "Unknown W16", NULL, MB_OK);
-		//MessageBeep(MB_ICONWARNING);
+		SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Unknown W16", NULL);
 		break;
 	}
 }
@@ -1115,8 +1081,7 @@ void CNetBoard::Write32(UINT32 a, UINT32 d)
 		if (a > 0x0ffff)
 		{
 			printf("OUT OF RANGE RAM[%x]\n", a);
-			MessageBox(NULL, "Out of Range", NULL, MB_OK);
-			//MessageBeep(MB_ICONWARNING);
+			SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Out of Range", NULL);
 		}
 		*(UINT16 *)&RAM[a] = (d >> 16);
 		*(UINT16 *)&RAM[a + 2] = (d & 0xFFFF);
@@ -1128,7 +1093,6 @@ void CNetBoard::Write32(UINT32 a, UINT32 d)
 		{
 			printf("OUT OF RANGE ctrlrw[%x]\n", a);
 			MessageBox(NULL, "Out of Range", NULL, MB_OK);
-			//MessageBeep(MB_ICONWARNING);
 		}
 		*(UINT16 *)&ctrlrw[a] = (d >> 16);
 		*(UINT16 *)&ctrlrw[a + 2] = (d & 0xFFFF);
@@ -1139,8 +1103,7 @@ void CNetBoard::Write32(UINT32 a, UINT32 d)
 		if ((a & 0x3ffff) > 0xffff)
 		{
 			printf("OUT OF RANGE CommRAM[%x]\n", a);
-			MessageBox(NULL, "Out of Range", NULL, MB_OK);
-			//MessageBeep(MB_ICONWARNING);
+			SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Out of Range", NULL);
 		}
 
 		*(UINT16 *)&CommRAM[a & 0xffff] = (d >> 16);
@@ -1153,7 +1116,6 @@ void CNetBoard::Write32(UINT32 a, UINT32 d)
 		{
 			printf("OUT OF RANGE ioreg[%x]\n", a);
 			MessageBox(NULL, "Out of Range", NULL, MB_OK);
-			//MessageBeep(MB_ICONWARNING);
 		}
 		*(UINT16 *)&ioreg[a] = (d >> 16);
 		*(UINT16 *)&ioreg[a + 2] = (d & 0xFFFF);
@@ -1164,8 +1126,7 @@ void CNetBoard::Write32(UINT32 a, UINT32 d)
 
 	default:
 		printf("NetBoard 68K: Unknown W32 (%x) %08X<-%08X\n", (a >> 16) & 0xF,a, d);
-		MessageBox(NULL, "Unknown W32", NULL, MB_OK);
-		//MessageBeep(MB_ICONWARNING);
+		SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Info", "Unknown W32", NULL);
 		break;
 	}
 
diff --git a/Src/Network/NetBoard.h b/Src/Network/NetBoard.h
index 0889dae..3446f05 100644
--- a/Src/Network/NetBoard.h
+++ b/Src/Network/NetBoard.h
@@ -4,8 +4,6 @@
 #include "Types.h"
 #include "CPU/Bus.h"
 #include "OSD/Thread.h"
-#include <winsock2.h>
-#include <ws2tcpip.h>
 #include <memory>
 #include "TCPSend.h"
 #include "TCPReceive.h"
diff --git a/Src/Supermodel.h b/Src/Supermodel.h
index 9922074..fb41590 100644
--- a/Src/Supermodel.h
+++ b/Src/Supermodel.h
@@ -27,7 +27,7 @@
  
 #ifndef INCLUDED_SUPERMODEL_H
 #define INCLUDED_SUPERMODEL_H
-#ifdef NET_BOARD
+#if (defined NET_BOARD && defined _WIN32)
 #include "Winsock2.h" // force include winsock2 before windows.h because conflict with winsock1
 #endif
 // Used throughout Supermodel