definitions can emit many

src/main/scala/com/htmlism/mos6502/dsl/AsmDocumentContext.scala

@@ -65,7 +65,9 @@ class DefinitionGroupContext {
     ListBuffer()
 
   def push[A](x: A)(implicit ev: Definable[A]): Unit =
-    xs.append(ev.toDefinition(x))
+    ev
+      .toDefinitions(x)
+      .foreach(xs.append)
 
   def toGroup(s: String): DefinitionGroup =
     DefinitionGroup(s, xs.toList)
@@ -80,8 +82,8 @@ case class Definition[A: Operand](name: String, x: A) {
 object Definition {
   implicit def definitionDefinable[A]: Definable[Definition[A]] =
     new Definable[Definition[A]] {
-      def toDefinition(x: Definition[A]) =
-        x
+      def toDefinitions(x: Definition[A]): List[Definition[_]] =
+        List(x)
     }
 }
 

src/main/scala/com/htmlism/mos6502/dsl/Definable.scala

@@ -1,5 +1,9 @@
 package com.htmlism.mos6502.dsl
 
 trait Definable[A] {
-  def toDefinition(x: A): Definition[_]
+
+  /**
+    * A `Definable` can emit multiple definitions. Usually in the case of `word`s being split across two byte-definitions
+    */
+  def toDefinitions(x: A): List[Definition[_]]
 }

src/main/scala/com/htmlism/mos6502/dsl/ReadWriteLocation.scala

@@ -22,7 +22,9 @@ case class ReadWriteLocation[A](name: String, address: Address) {
 object ReadWriteLocation {
   implicit def readWriteLocationDefinable[A]: Definable[ReadWriteLocation[A]] =
     new Definable[ReadWriteLocation[A]] {
-      def toDefinition(x: ReadWriteLocation[A]): Definition[ZeroAddress] =
-        Definition(x.name, 0x00.z)
+      def toDefinitions(x: ReadWriteLocation[A]): List[Definition[ZeroAddress]] =
+        List {
+          Definition(x.name, 0x00.z)
+        }
     }
 }

src/main/scala/com/htmlism/mos6502/dsl/VolatileDevice.scala

@@ -19,7 +19,9 @@ case class VolatileDevice[A](name: String, address: Address) {
 object VolatileDevice {
   implicit def volatileDeviceDefinable[A]: Definable[VolatileDevice[A]] =
     new Definable[VolatileDevice[A]] {
-      def toDefinition(x: VolatileDevice[A]): Definition[ZeroAddress] =
-        Definition(x.name, 0x00.z)
+      def toDefinitions(x: VolatileDevice[A]): List[Definition[ZeroAddress]] =
+        List {
+          Definition(x.name, 0x00.z)
+        }
     }
 }