diff --git a/codeGeneration/src/prog8/compiler/target/cpu6502/codegen/ExpressionsAsmGen.kt b/codeGeneration/src/prog8/compiler/target/cpu6502/codegen/ExpressionsAsmGen.kt
index 5c40c4d59..10f746edf 100644
--- a/codeGeneration/src/prog8/compiler/target/cpu6502/codegen/ExpressionsAsmGen.kt
+++ b/codeGeneration/src/prog8/compiler/target/cpu6502/codegen/ExpressionsAsmGen.kt
@@ -94,7 +94,26 @@ internal class ExpressionsAsmGen(private val program: Program, private val asmge
                 }
             }
             DataType.BYTE, DataType.WORD -> {
-                TODO("signed BYTE/UWORD comparison $operator")
+                if(dt==DataType.BYTE) {
+                    asmgen.assignExpressionToRegister(left, RegisterOrPair.A)
+                    if (left is FunctionCall && !left.isSimple)
+                        asmgen.out("  cmp  #0")
+                } else {
+                    asmgen.assignExpressionToRegister(left, RegisterOrPair.AY)
+                    asmgen.out("  sty  P8ZP_SCRATCH_B1 |  ora  P8ZP_SCRATCH_B1")        // TODO PROBABLY NOT OKAY FOR WORDS
+                }
+                when (operator) {
+                    "==" -> asmgen.out("  bne  $jumpIfFalseLabel")
+                    "!=" -> asmgen.out("  beq  $jumpIfFalseLabel")
+                    ">" -> asmgen.out("  beq  $jumpIfFalseLabel |  bmi  $jumpIfFalseLabel")
+                    "<" -> asmgen.out("  bpl  $jumpIfFalseLabel")
+                    ">=" -> asmgen.out("  bmi  $jumpIfFalseLabel")
+                    "<=" -> asmgen.out("""
+                          beq  +
+                          bpl  $jumpIfFalseLabel
+                      +   """)
+                    else -> throw AssemblyError("invalid comparison operator $operator")
+                }
             }
             DataType.FLOAT -> {
                 asmgen.assignExpressionToRegister(left, RegisterOrPair.FAC1)
diff --git a/examples/test.p8 b/examples/test.p8
index 628a9dba1..3cc40bfb6 100644
--- a/examples/test.p8
+++ b/examples/test.p8
@@ -4,7 +4,7 @@
 main {
 
     sub start() {
-        ubyte xx
+        byte xx
 
         xx=0
 
@@ -16,7 +16,7 @@ main {
         if xx<=0 {
             txt.print("xx<=0\n")
         } else {
-            txt.print("error1\n")
+            txt.print("error1qq\n")
         }
         if xx>0 {
             txt.print("xx>0 error\n")
@@ -53,27 +53,27 @@ main {
         }
         txt.nl()
 
-;        xx=-11
-;        if xx>=0 {
-;            txt.print("xx>=0 error\n")
-;        } else {
-;            txt.print("ok3\n")
-;        }
-;        if xx<=0 {
-;            txt.print("xx<=0\n")
-;        } else {
-;            txt.print("error3\n")
-;        }
-;        if xx>0 {
-;            txt.print("xx>0 error\n")
-;        } else {
-;            txt.print("ok3\n")
-;        }
-;        if xx<0 {
-;            txt.print("xx<0\n")
-;        } else {
-;            txt.print("error3\n")
-;        }
+        xx=-11
+        if xx>=0 {
+            txt.print("xx>=0 error\n")
+        } else {
+            txt.print("ok3\n")
+        }
+        if xx<=0 {
+            txt.print("xx<=0\n")
+        } else {
+            txt.print("error3\n")
+        }
+        if xx>0 {
+            txt.print("xx>0 error\n")
+        } else {
+            txt.print("ok3\n")
+        }
+        if xx<0 {
+            txt.print("xx<0\n")
+        } else {
+            txt.print("error3\n")
+        }