hle bios memset fix (issue 11764);

git-svn-id: https://pcsxr.svn.codeplex.com/svn/pcsxr@90952 e17a0e51-4ae3-4d35-97c3-1a29b211df97

1 files changed, 18 insertions, 3 deletions

diff --git a/libpcsxcore/psxbios.c b/libpcsxcore/psxbios.c
index 5947d407..bf501356 100755
--- a/libpcsxcore/psxbios.c
+++ b/libpcsxcore/psxbios.c
@@ -642,10 +642,25 @@ void psxBios_memcpy() { // 0x2a
 }
 
 void psxBios_memset() { // 0x2b
-	char *p = (char *)Ra0;
-	while (a2-- > 0) *p++ = (char)a1;
+	a1 &= 0xff;
 
-	v0 = a0; pc0 = ra;
+	if(!a0)
+	{
+		v0 = 0; 
+	}
+	else
+	{
+		v0 = a0;
+		
+		while((s32)a2 > 0)
+		{
+			a2--;
+			psxMu8ref(a0) = a1;
+			a0++;
+		}
+	}
+	
+	pc0 = ra;
 }
 
 void psxBios_memmove() { // 0x2c