diff --git a/firepower-core/src/main/scala/com/htmlism/firepower/core/AsmBlock.scala b/firepower-core/src/main/scala/com/htmlism/firepower/core/AsmBlock.scala
index 9b66380..e0a25f4 100644
--- a/firepower-core/src/main/scala/com/htmlism/firepower/core/AsmBlock.scala
+++ b/firepower-core/src/main/scala/com/htmlism/firepower/core/AsmBlock.scala
@@ -1,5 +1,7 @@
 package com.htmlism.firepower.core
 
+import cats.syntax.all._
+
 sealed trait AsmBlock
 
 object AsmBlock:
@@ -94,16 +96,13 @@ object AsmBlock:
   case class Intent(label: Option[String], instructions: List[Intent.Instruction])
 
   object Intent:
-    sealed trait Instruction:
-      def length: Int
+    case class Instruction(code: String, operand: Option[String], comment: Option[String]):
+      def length: Int =
+        (code + " " + operand.getOrElse("")).length
 
     object Instruction:
-      case class One(code: String, operand: String, comment: Option[String]) extends Instruction:
-        def length: Int =
-          operand.length + 4
-      case class Zero(code: String, comment: Option[String])                 extends Instruction:
-        def length: Int =
-          0
+      def one(code: String, operand: String, comment: Option[String]): Instruction =
+        Instruction(code, operand.some, comment)
 
     def toLines(opts: AssemblerOptions.InstructionCase)(x: Intent): List[String] =
       val comment =
@@ -118,28 +117,16 @@ object AsmBlock:
       val instructions =
         x
           .instructions
-          .map {
-            case Instruction.Zero(code, oComment) =>
-              val codeUpperLower =
-                instruction(code, opts)
+          .map { i =>
+            val leftSlug =
+              instruction(i.code, opts) + i.operand.map(" " + _).getOrElse("")
 
-              oComment match
-                case Some(c) =>
-                  String.format(s"%-${maximumLength}s", codeUpperLower) + " " + toComment(c)
+            i.comment match
+              case Some(c) =>
+                String.format(s"%-${maximumLength}s", leftSlug) + " " + toComment(c)
 
-                case None =>
-                  codeUpperLower
-
-            case Instruction.One(code, operand, oComment) =>
-              val leftSlug =
-                instruction(code, opts) + " " + operand
-
-              oComment match
-                case Some(c) =>
-                  String.format(s"%-${maximumLength}s", leftSlug) + " " + toComment(c)
-
-                case None =>
-                  leftSlug
+              case None =>
+                leftSlug
           }
           .map(withIndent)
 
diff --git a/firepower-core/src/main/scala/com/htmlism/firepower/core/Subroutine.scala b/firepower-core/src/main/scala/com/htmlism/firepower/core/Subroutine.scala
index a5e5f20..d3b02e8 100644
--- a/firepower-core/src/main/scala/com/htmlism/firepower/core/Subroutine.scala
+++ b/firepower-core/src/main/scala/com/htmlism/firepower/core/Subroutine.scala
@@ -6,7 +6,7 @@ import com.htmlism.firepower.core.AsmBlock._
 
 case class Subroutine(name: String, intents: List[Intent]):
   def call: Intent.Instruction =
-    Intent.Instruction.One("jsr", name, None)
+    Intent.Instruction.one("jsr", name, None)
 
   def attach: NamedCodeBlock =
     NamedCodeBlock(name, "this is a named block".some, intents)
diff --git a/firepower-demo/src/main/scala/com/htmlism/firepower/demo/AnnotatedSnake.scala b/firepower-demo/src/main/scala/com/htmlism/firepower/demo/AnnotatedSnake.scala
index 4e0019a..66a1e77 100644
--- a/firepower-demo/src/main/scala/com/htmlism/firepower/demo/AnnotatedSnake.scala
+++ b/firepower-demo/src/main/scala/com/htmlism/firepower/demo/AnnotatedSnake.scala
@@ -17,15 +17,15 @@ object AnnotatedSnake:
           AsmBlock.Intent(
             None,
             List(
-              AsmBlock.Intent.Instruction.One("lda", "$00", None),
-              AsmBlock.Intent.Instruction.One("lda", "$01", "instruction comment".some)
+              AsmBlock.Intent.Instruction.one("lda", "$00", None),
+              AsmBlock.Intent.Instruction.one("lda", "$01", "instruction comment".some)
             )
           ),
           AsmBlock.Intent(
             "this block has some preamble".some,
             List(
-              AsmBlock.Intent.Instruction.One("lda", "$00", None),
-              AsmBlock.Intent.Instruction.One("lda", "$01", "instruction comment".some)
+              AsmBlock.Intent.Instruction.one("lda", "$00", None),
+              AsmBlock.Intent.Instruction.one("lda", "$01", "instruction comment".some)
             )
           )
         )
@@ -37,15 +37,15 @@ object AnnotatedSnake:
           AsmBlock.Intent(
             None,
             List(
-              AsmBlock.Intent.Instruction.One("lda", "$00", None),
-              AsmBlock.Intent.Instruction.One("lda", "$01", "instruction comment".some)
+              AsmBlock.Intent.Instruction.one("lda", "$00", None),
+              AsmBlock.Intent.Instruction.one("lda", "$01", "instruction comment".some)
             )
           ),
           AsmBlock.Intent(
             "this block has some preamble".some,
             List(
-              AsmBlock.Intent.Instruction.One("lda", "$00", None),
-              AsmBlock.Intent.Instruction.One("lda", "$01", "instruction comment".some)
+              AsmBlock.Intent.Instruction.one("lda", "$00", None),
+              AsmBlock.Intent.Instruction.one("lda", "$01", "instruction comment".some)
             )
           )
         )
diff --git a/firepower-demo/src/main/scala/com/htmlism/firepower/demo/PrintThree.scala b/firepower-demo/src/main/scala/com/htmlism/firepower/demo/PrintThree.scala
index a24830f..559eb1c 100644
--- a/firepower-demo/src/main/scala/com/htmlism/firepower/demo/PrintThree.scala
+++ b/firepower-demo/src/main/scala/com/htmlism/firepower/demo/PrintThree.scala
@@ -78,11 +78,11 @@ object PrintThree:
             AsmBlock
               .Intent
               .Instruction
-              .One("LDA", argument, s"a = ${mv.src.toComment}".some),
+              .one("LDA", argument, s"a = ${mv.src.toComment}".some),
             AsmBlock
               .Intent
               .Instruction
-              .One(
+              .one(
                 "STA",
                 argumentTwo,
                 s"${mv.dest.toComment} = a".some