diff --git a/codeGenVirtual/src/prog8/codegen/virtual/CodeGen.kt b/codeGenVirtual/src/prog8/codegen/virtual/CodeGen.kt
index eab914cc5..b97faf3fd 100644
--- a/codeGenVirtual/src/prog8/codegen/virtual/CodeGen.kt
+++ b/codeGenVirtual/src/prog8/codegen/virtual/CodeGen.kt
@@ -279,6 +279,7 @@ class CodeGen(internal val program: PtProgram,
             code += addConstMem(loopvarDt, loopvarAddress.toUInt(), step)
             code += VmCodeInstruction(Opcode.LOADM, loopvarDt, reg1 = indexReg, value = loopvarAddress)
         } else {
+            // TODO WHY THID DISTINCTION?
             code += VmCodeInstruction(Opcode.LOADM, loopvarDt, reg1 = indexReg, value = loopvarAddress)
             code += addConstReg(loopvarDt, indexReg, step)
             code += VmCodeInstruction(Opcode.STOREM, loopvarDt, reg1 = indexReg, value = loopvarAddress)
@@ -318,6 +319,7 @@ class CodeGen(internal val program: PtProgram,
             code += addConstMem(loopvarDt, loopvarAddress.toUInt(), step)
             code += VmCodeInstruction(Opcode.LOADM, loopvarDt, reg1 = indexReg, value = loopvarAddress)
         } else {
+            // TODO WHY THIS DISTICTION ?
             code += VmCodeInstruction(Opcode.LOADM, loopvarDt, reg1 = indexReg, value = loopvarAddress)
             code += addConstReg(loopvarDt, indexReg, step)
             code += VmCodeInstruction(Opcode.STOREM, loopvarDt, reg1 = indexReg, value = loopvarAddress)
@@ -383,13 +385,13 @@ class CodeGen(internal val program: PtProgram,
                 if(value>0) {
                     code += VmCodeInstruction(Opcode.LOADM, dt, reg1=valueReg, value=address.toInt())
                     code += VmCodeInstruction(Opcode.LOAD, dt, reg1=operandReg, value=value)
-                    code += VmCodeInstruction(Opcode.ADDR, dt, reg1 = valueReg, reg2 = operandReg)
+                    code += VmCodeInstruction(Opcode.ADDR, dt, reg1 = valueReg, reg2 = operandReg)          // TODO USE ADDM?
                     code += VmCodeInstruction(Opcode.STOREM, dt, reg1=valueReg, value=address.toInt())
                 }
                 else {
                     code += VmCodeInstruction(Opcode.LOADM, dt, reg1=valueReg, value=address.toInt())
                     code += VmCodeInstruction(Opcode.LOAD, dt, reg1=operandReg, value=-value)
-                    code += VmCodeInstruction(Opcode.SUBR, dt, reg1 = valueReg, reg2 = operandReg)
+                    code += VmCodeInstruction(Opcode.SUBR, dt, reg1 = valueReg, reg2 = operandReg)          // TODO USE ADDM?
                     code += VmCodeInstruction(Opcode.STOREM, dt, reg1=valueReg, value=address.toInt())
                 }
             }
diff --git a/compiler/res/prog8lib/conv.p8 b/compiler/res/prog8lib/conv.p8
index a7b74ca4c..2e050a2e5 100644
--- a/compiler/res/prog8lib/conv.p8
+++ b/compiler/res/prog8lib/conv.p8
@@ -416,6 +416,9 @@ _loop
 	beq  _stop
 	cmp  #7                 ; screencode letters A-F are 1-6
 	bcc  _add_letter
+	and  #127
+	cmp  #97
+	bcs  _try_iso            ; maybe letter is iso:'a'-iso:'f' (97-102)
 	cmp  #'g'
 	bcs  _stop
 	cmp  #'a'
@@ -451,6 +454,11 @@ _add_letter
 	sta  P8ZP_SCRATCH_B1
 	pla
 	jmp  _calc
+_try_iso
+        cmp  #103
+        bcs  _stop
+        and  #63
+        bne  _add_letter
 	}}
 }
 
diff --git a/compiler/res/prog8lib/virtual/conv.p8 b/compiler/res/prog8lib/virtual/conv.p8
index 6518366c8..43b0d7d0c 100644
--- a/compiler/res/prog8lib/virtual/conv.p8
+++ b/compiler/res/prog8lib/virtual/conv.p8
@@ -251,4 +251,13 @@ sub  bin2uword(str string) -> uword {
     }
 }
 
+sub  any2uword(str string) -> uword {
+    ; -- convert any number string (any prefix allowed) to uword.
+    when string[0] {
+        '$' -> return hex2uword(string)
+        '%' -> return bin2uword(string)
+        else -> return str2uword(string)
+    }
+}
+
 }
diff --git a/docs/source/todo.rst b/docs/source/todo.rst
index d904be634..b3c5fd8ba 100644
--- a/docs/source/todo.rst
+++ b/docs/source/todo.rst
@@ -3,9 +3,10 @@ TODO
 
 For next release
 ^^^^^^^^^^^^^^^^
-- conv.any2uword doesn't accept uppercase hex letters
 - see if we can let for loops skip the loop if end<start, without adding a lot of code size/duplicating the loop condition
-  this is documented behiavor to now loop around but it's too easy to forget about
+  this is documented behavior to now loop around but it's too easy to forget about
+    Lot of work because of so many special cases in ForLoopsAsmgen.....
+    How is it for the vm target? -> just 2 special cases in CodeGen.
 
 ...