diff --git a/include/memory.h b/include/memory.h
index dc937d0..bdad330 100755
--- a/include/memory.h
+++ b/include/memory.h
@@ -91,7 +91,7 @@ u8* physical_page_getfree(void);
 void physical_init(void);
 void initpaging(void);
 void virtual_init(void);
-tmalloc *mallocpage(u8 size);
+tmalloc *mallocpage(u64 size);
 void *vmalloc(u32 size);
 void vfree(void *vaddr);
 page *virtual_page_getfree(void);
diff --git a/include/shell.h b/include/shell.h
index 6e7e8e9..e983d98 100644
--- a/include/shell.h
+++ b/include/shell.h
@@ -29,3 +29,4 @@ int help();
 int logo();
 int detectpci();
 int mem();
+int testmem();
diff --git a/lib/memory.c b/lib/memory.c
index b1c58b5..e7e1a6e 100755
--- a/lib/memory.c
+++ b/lib/memory.c
@@ -22,11 +22,14 @@ void panic(u8 *string)
 /*******************************************************************************/ 
 /* Alloue plusieurs pages virtuelles (size) pour le heap du noyau */ 
 
-tmalloc *mallocpage(u8 size)
+tmalloc *mallocpage(u64 size)
 {
 	tmalloc *chunk;
 	u8 *paddr;
-	u32 realsize=size * PAGESIZE;
+	u16 nbpages=size / PAGESIZE;
+    u64 realsize=nbpages * PAGESIZE;
+    if (size%PAGESIZE!=0)
+        realsize+=PAGESIZE;
 	if ((kernelcurrentheap - KERNEL_HEAP + realsize) > MAXHEAPSIZE)
 		panic("Plus de memoire noyau heap disponible a allouer !\n");
 	chunk = (tmalloc *) kernelcurrentheap;
@@ -47,7 +50,7 @@ u32 getmallocnb(void)
 	chunk = KERNEL_HEAP;
 	while (chunk < (tmalloc *) kernelcurrentheap) {
             realsize++;
-		chunk = chunk + chunk->size;
+		chunk = (tmalloc *)((u8 *) chunk + chunk->size);
     }
     return realsize;
 }
@@ -64,7 +67,7 @@ u32 getmallocused(void)
 	while (chunk < (tmalloc *) kernelcurrentheap) {
         if (chunk->used)
             realsize+=chunk->size;
-		chunk = chunk + chunk->size;
+		chunk = (tmalloc *)((u8 *) chunk + chunk->size);
     }
     return realsize;
 }
@@ -80,7 +83,7 @@ u32 getmallocfree(void)
 	while (chunk < (tmalloc *) kernelcurrentheap) {
         if (!chunk->used)
             realsize+=chunk->size;
-		chunk = chunk + chunk->size;
+		chunk = (tmalloc *)((u8 *) chunk + chunk->size);
     }
     return realsize;
 }
@@ -107,16 +110,16 @@ void *vmalloc(u32 size)
 	while (chunk->used || chunk->size < realsize) {
 		if (chunk->size == 0)
 			panic(sprintf("Element du heap %x defectueux avec une taille nulle (heap %x) !",chunk, kernelcurrentheap));
-		chunk = chunk + chunk->size;
+		chunk = (tmalloc *)((u8 *) chunk + chunk->size);
 		if (chunk == (tmalloc *) kernelcurrentheap)
-			mallocpage((realsize / PAGESIZE) + 1);
+			mallocpage(realsize);
 		else if (chunk > (tmalloc *) kernelcurrentheap)
 			panic (sprintf("Element du heap %x depassant la limite %x !",chunk, kernelcurrentheap));
 	}
 	if (chunk->size - realsize < MALLOC_MINIMUM)
 		chunk->used = 1;
 	else {
-		new = chunk + realsize;
+		new = (tmalloc *)((u8 *) chunk + realsize);
 		new->size = chunk->size - realsize;
 		new->used = 0;
 		chunk->size = realsize;
@@ -133,7 +136,7 @@ void vfree(void *vaddr)
 	tmalloc *chunk, *new;
 	chunk = (tmalloc *) (vaddr - sizeof(tmalloc));
 	chunk->used = 0;
-	while ((new = (tmalloc *) chunk + chunk->size) && new < (tmalloc *) kernelcurrentheap && new->used == 0)
+	while ((new = (tmalloc *)((u8 *) chunk + chunk->size)) && new < (tmalloc *) kernelcurrentheap && new->used == 0)
 		chunk->size += new->size;
 }
 
@@ -379,14 +382,18 @@ void virtual_range_use(pd *dst, u8 *vaddr, u8 *paddr, u64 len, u32 flags)
 	if (len%PAGESIZE!=0) realen++;
 	for(i=0;i<realen;i++)
 	{
-		pg = (page *) vmalloc(sizeof(page));
-		pg->paddr = paddr+i*PAGESIZE; 
-		pg->vaddr = vaddr+i*PAGESIZE;
-		if (dst!=NULL)
-            TAILQ_INSERT_TAIL(&dst->page_head, pg, tailq);
+        if (dst==NULL)
+        {
+            virtual_pd_page_add(dst, vaddr+i*PAGESIZE, paddr+i*PAGESIZE, flags);
+        }
         else
-            vfree(pg);
-		virtual_pd_page_add(dst, pg->vaddr, pg->paddr, flags);
+        {
+		    pg = (page *) vmalloc(sizeof(page));
+		    pg->paddr = paddr+i*PAGESIZE; 
+		    pg->vaddr = vaddr+i*PAGESIZE;
+            TAILQ_INSERT_TAIL(&dst->page_head, pg, tailq);
+    		virtual_pd_page_add(dst, pg->vaddr, pg->paddr, flags);
+        }
 	}
 }
 
@@ -416,15 +423,19 @@ void virtual_range_new(pd *dst, u8 *vaddr, u64 len, u32 flags)
 	if (len%PAGESIZE!=0) realen++;
 	for(i=0;i<realen;i++)
 	{
-		pg = (page *) vmalloc(sizeof(page));
-		pg->paddr = physical_page_getfree(); 
-		pg->vaddr = (u8 *) (vaddr+i*PAGESIZE);
-		if (dst!=NULL)
-            TAILQ_INSERT_TAIL(&dst->page_head, pg, tailq);
+        if (dst==NULL)
+        {
+            virtual_pd_page_add(dst, vaddr+i*PAGESIZE, physical_page_getfree(), flags);
+        }
         else
-            vfree(pg);
-		virtual_pd_page_add(dst, pg->vaddr, pg->paddr, flags);
-	}
+        {
+		    pg = (page *) vmalloc(sizeof(page));
+		    pg->paddr = physical_page_getfree();
+		    pg->vaddr = vaddr+i*PAGESIZE;
+            TAILQ_INSERT_TAIL(&dst->page_head, pg, tailq);
+    		virtual_pd_page_add(dst, pg->vaddr, pg->paddr, flags);
+        }
+    }
 }
 
 /*******************************************************************************/ 
diff --git a/lib/shell.c b/lib/shell.c
index 539c353..bf3155b 100644
--- a/lib/shell.c
+++ b/lib/shell.c
@@ -41,6 +41,8 @@ static command commands[] = {
 	{"test3d"      , "", &test3d},
 	{"detectpci"      , "", &detectpci},
 	{"mem"      , "", &mem},
+	{"testmem"      , "", &testmem},
+
 };
 
 /*******************************************************************************/
@@ -80,13 +82,29 @@ int test(void)
     return;
 }
 
+/*******************************************************************************/
+/* Test la memoire */
+int testmem()
+{
+    u8* test;
+    print("**** AVANT ALLOCATION\r\n");    
+    mem();
+    test=vmalloc(4096*10); /* 10 pages */
+    print("**** APRES ALLOCATION\r\n");
+    mem();
+    vfree(test);
+    print("**** APRES LIBERATION\r\n");
+    mem();
+
+}
+
 /*******************************************************************************/
 /* Affiche des informations sur la mémoire */
 int mem()
 {
     u32 libre=getmemoryfree();
     u32 total=physical_getmemorysize();
-    printf("Memoire physique (TOTAL)\r\n -libre \33[40D\33[15C%H\r\n -occupee \33[40D\33[15C%H\r\n -total \33[40D\33[15C%H\r\n\r\n",libre,total-libre,total);
+    printf("Memoire physique (TOTAL)\r\n -libre \33[40D\33[15C%H (%.2f%%)\r\n -occupee \33[40D\33[15C%H\r\n -total \33[40D\33[15C%H\r\n\r\n",libre,(float) libre/total*100,total-libre,total);
     printf("Memoire HEAP (NOYAU) - % u blocs\r\n -libre \33[40D\33[15C%H\r\n -occupee \33[40D\33[15C%H\r\n -allouables \33[40D\33[15C%H\r\n\r\n",getmallocnb(),getmallocfree(),getmallocused(),getmallocnonallocated());
     printf("Plan de memoire (NOYAU)\r\n -IDT \33[40D\33[15C%X\r\n -GDT \33[40D\33[15C%X\r\n -PGD \33[40D\33[15C%X\r\n -STACK \33[40D\33[15C%X\r\n -CODE \33[40D\33[15C%X\r\n -PAGES \33[40D\33[15C%X\r\n -HEAP \33[40D\33[15C%X\r\n -VESAFB \33[40D\33[15C%X\r\n\r\n",IDT_ADDR,GDT_ADDR,KERNEL_PD_ADDR,KERNEL_STACK_ADDR,KERNEL_CODE_ADDR,KERNEL_PAGES,KERNEL_HEAP,VESA_FBMEM);
     printf("Memoire Virtuelle (NOYAU)\r\n -pages libres \33[40D\33[16C% u\r\n -pages occupees \33[40D\33[16C% u\r\n",virtual_getpagesfree(),virtual_getpagesused());
diff --git a/lib/video.c b/lib/video.c
index bd9079c..6134f95 100755
--- a/lib/video.c
+++ b/lib/video.c
@@ -1158,6 +1158,10 @@ u32 format(const u8 * string, va_list args, u32 maxsize, u32 (*fonction)(u8* src
 				counter += fonction(&buffer,&dest,buffersize);
 				flag = false;
 				break;
+            case '%':
+			    fonction(&achar,string,1);
+				counter++;
+				flag = false;                
 			case 'c':
 				temp = (u8) va_arg(args, u8);
 			    fonction(&temp,string,1);