--- hatari/src/uae-cpu/memory.c	2019/04/09 08:49:42	1.1.1.15
+++ hatari/src/uae-cpu/memory.c	2019/04/09 08:54:38	1.1.1.17
@@ -7,11 +7,12 @@
   *
   * Adaptation to Hatari by Thomas Huth
   *
-  * This file is distributed under the GNU Public License, version 2 or at
-  * your option any later version. Read the file gpl.txt for details.
+  * This file is distributed under the GNU General Public License, version 2
+  * or at your option any later version. Read the file gpl.txt for details.
   */
 const char Memory_fileid[] = "Hatari memory.c : " __DATE__ " " __TIME__;
 
+#include <SDL.h>
 #include "config.h"
 #include "sysdeps.h"
 #include "hatari-glue.h"
@@ -32,6 +33,7 @@ const char Memory_fileid[] = "Hatari mem
 /* Set illegal_mem to 1 for debug output: */
 #define illegal_mem 1
 
+static int illegal_count = 50;
 
 static uae_u32 STmem_size, TTmem_size = 0;
 static uae_u32 TTmem_mask;
@@ -87,11 +89,21 @@ __inline__ void byteput (uaecptr addr, u
 
 
 /* Some prototypes: */
-extern void SDL_Quit(void);
 static int STmem_check (uaecptr addr, uae_u32 size) REGPARAM;
 static uae_u8 *STmem_xlate (uaecptr addr) REGPARAM;
 
 
+static void print_illegal_counted(const char *txt, uaecptr addr)
+{
+    if (!illegal_mem || illegal_count <= 0)
+        return;
+
+    write_log("%s at %08lx\n", txt, (long)addr);
+    if (--illegal_count == 0)
+        write_log("Suppressing further messages about illegal memory accesses.\n");
+}
+
+
 /* A dummy bank that only contains zeros */
 
 static uae_u32 dummy_lget(uaecptr addr)
@@ -157,8 +169,7 @@ static uae_u8 *dummy_xlate(uaecptr addr)
 
 static uae_u32 BusErrMem_lget(uaecptr addr)
 {
-    if (illegal_mem)
-	write_log ("Bus error lget at %08lx\n", (long)addr);
+    print_illegal_counted("Bus error lget", addr);
 
     M68000_BusError(addr, BUS_ERROR_READ);
     return 0;
@@ -166,8 +177,7 @@ static uae_u32 BusErrMem_lget(uaecptr ad
 
 static uae_u32 BusErrMem_wget(uaecptr addr)
 {
-    if (illegal_mem)
-	write_log ("Bus error wget at %08lx\n", (long)addr);
+    print_illegal_counted("Bus error wget", addr);
 
     M68000_BusError(addr, BUS_ERROR_READ);
     return 0;
@@ -175,8 +185,7 @@ static uae_u32 BusErrMem_wget(uaecptr ad
 
 static uae_u32 BusErrMem_bget(uaecptr addr)
 {
-    if (illegal_mem)
-	write_log ("Bus error bget at %08lx\n", (long)addr);
+    print_illegal_counted("Bus error bget", addr);
 
     M68000_BusError(addr, BUS_ERROR_READ);
     return 0;
@@ -184,24 +193,21 @@ static uae_u32 BusErrMem_bget(uaecptr ad
 
 static void BusErrMem_lput(uaecptr addr, uae_u32 l)
 {
-    if (illegal_mem)
-	write_log ("Bus error lput at %08lx\n", (long)addr);
+    print_illegal_counted("Bus error lput", addr);
 
     M68000_BusError(addr, BUS_ERROR_WRITE);
 }
 
 static void BusErrMem_wput(uaecptr addr, uae_u32 w)
 {
-    if (illegal_mem)
-	write_log ("Bus error wput at %08lx\n", (long)addr);
+    print_illegal_counted("Bus error wput", addr);
 
     M68000_BusError(addr, BUS_ERROR_WRITE);
 }
 
 static void BusErrMem_bput(uaecptr addr, uae_u32 b)
 {
-    if (illegal_mem)
-	write_log ("Bus error bput at %08lx\n", (long)addr);
+    print_illegal_counted("Bus error bput", addr);
 
     M68000_BusError(addr, BUS_ERROR_WRITE);
 }
@@ -380,6 +386,10 @@ static void SysMem_bput(uaecptr addr, ua
  * **** Void memory ****
  * Between the ST-RAM end and the 4 MB barrier, there is a void memory space:
  * Reading always returns the same value and writing does nothing at all.
+ * [NP] : this is not correct, reading does not always return 0, when there's
+ * no memory, it will return the latest data that was read on the bus.
+ * In many cases, this will return the word that was just read in the 68000's
+ * prefetch register to decode the next opcode (tested on a real STF)
  */
 
 static uae_u32 VoidMem_lget(uaecptr addr)
@@ -514,24 +524,21 @@ static uae_u32 ROMmem_bget(uaecptr addr)
 
 static void ROMmem_lput(uaecptr addr, uae_u32 b)
 {
-    if (illegal_mem)
-	write_log ("Illegal ROMmem lput at %08lx\n", (long)addr);
+    print_illegal_counted("Illegal ROMmem lput", (long)addr);
 
     M68000_BusError(addr, BUS_ERROR_WRITE);
 }
 
 static void ROMmem_wput(uaecptr addr, uae_u32 b)
 {
-    if (illegal_mem)
-	write_log ("Illegal ROMmem wput at %08lx\n", (long)addr);
+    print_illegal_counted("Illegal ROMmem wput", (long)addr);
 
     M68000_BusError(addr, BUS_ERROR_WRITE);
 }
 
 static void ROMmem_bput(uaecptr addr, uae_u32 b)
 {
-    if (illegal_mem)
-	write_log ("Illegal ROMmem bput at %08lx\n", (long)addr);
+    print_illegal_counted("Illegal ROMmem bput", (long)addr);
 
     M68000_BusError(addr, BUS_ERROR_WRITE);
 }
@@ -762,6 +769,8 @@ void memory_init(uae_u32 nNewSTMemSize,
 
     /* Illegal memory regions cause a bus error on the ST: */
     map_banks(&BusErrMem_bank, 0xF10000 >> 16, 0x9);
+
+    illegal_count = 50;
 }