--- a/ByteArray.st	Mon Jun 06 10:37:21 2016 +0100
+++ b/ByteArray.st	Mon Jun 06 10:56:12 2016 +0100
@@ -164,7 +164,6 @@
 ! !
 
 
-
 !ByteArray class methodsFor:'queries'!
 
 elementByteSize
@@ -183,9 +182,22 @@
     ^ self == ByteArray
 
     "Modified: 23.4.1996 / 15:56:25 / cg"
+!
+
+maxVal
+    "the minimum value which can be stored in instances of me.
+     For ByteArrays, this is 255"
+
+    ^ 255
+!
+
+minVal
+    "the minimum value which can be stored in instances of me.
+     For ByteArrays, this is 0"
+
+    ^ 0
 ! !
 
-
 !ByteArray methodsFor:'Compatibility-Squeak'!
 
 bitXor:aByteArray
@@ -198,22 +210,24 @@
     size := self size.
     size1 := aByteArray size.
     size1 < size ifTrue:[
-	size := size1.
+        size := size1.
     ].
 
     ^ self copy
-	bitXorBytesFrom:1 to:size with:aByteArray startingAt:1;
-	yourself.
+        bitXorBytesFrom:1 to:size with:aByteArray startingAt:1;
+        yourself.
 
     "
-	#[0 1 2 3 4] bitXor:#[0 1 2 3 4]
-	#[0 1 2 3 4] bitXor:#[0 1 2 3]
+     #[0 1 2 3 4] bitXor:#[0 1 2 3 4]
+     #[0 1 2 3 4] bitXor:#[0 1 2 3]
     "
 ! !
 
 !ByteArray methodsFor:'Compatibility-VW'!
 
 asByteString
+    "same as asString, for visualworks compatibility"
+    
     ^ self asString
 ! !
 
@@ -3092,7 +3106,6 @@
     "
 ! !
 
-
 !ByteArray methodsFor:'searching'!
 
 indexOf:aByte startingAt:start
@@ -3158,7 +3171,6 @@
     "
 ! !
 
-
 !ByteArray methodsFor:'testing'!
 
 isByteArray