diff --git a/src/binaryfile/disassembler.cxx b/src/binaryfile/disassembler.cxx
index a70a40a..ee16d25 100644
--- a/src/binaryfile/disassembler.cxx
+++ b/src/binaryfile/disassembler.cxx
@@ -705,3 +705,75 @@ void Disassembler::makeOpcodeTable()
 #endif
 
 }
+
+AssyInstruction::AssyInstruction(quint8 opcode, QString mnemonic, AddressMode am) {
+    m_opcode = opcode;
+    m_mnemonic = mnemonic;
+    m_addressMode = am;
+}
+
+quint8 AssyInstruction::numArgs() {
+    switch (m_addressMode) {
+    case AM_Absolute:
+    case AM_AbsoluteIndexedIndirect:
+    case AM_AbsoluteIndexedWithX:
+    case AM_AbsoluteIndexedWithY:
+    case AM_AbsoluteIndirect:
+        return 2;
+    case AM_ProgramCounterRelative:
+    case AM_ZeroPage:
+    case AM_ZeroPageIndirectIndexedWithY:
+    case AM_ZeroPageIndexedIndirect:
+    case AM_ZeroPageIndexedWithX:
+    case AM_ZeroPageIndexedWithY:
+    case AM_ZeroPageIndirect:
+    case AM_Immediate:
+        return 1;
+    case AM_InvalidOp:
+    case AM_Implied:
+    case AM_Accumulator:
+    default:
+        return 0;
+    }
+}
+
+DisassembledItem::DisassembledItem(AssyInstruction instr) {
+    setInstruction(instr);
+}
+
+void DisassembledItem::setInstruction(AssyInstruction instr) {
+    m_instruction = instr;
+    if (instr.opcode() == 0x20) { m_is_jsr = true; }
+    if (instr.opcode() == 0x10) { m_is_branch = true; } // BPL
+    if (instr.opcode() == 0x30) { m_is_branch = true; } // BMI
+    if (instr.opcode() == 0x50) { m_is_branch = true; } // BVC
+    if (instr.opcode() == 0x70) { m_is_branch = true; } // BVS
+    if (instr.opcode() == 0x90) { m_is_branch = true; } // BCC
+    if (instr.opcode() == 0xB0) { m_is_branch = true; } // BCS
+    if (instr.opcode() == 0xD0) { m_is_branch = true; } // BNE
+    if (instr.opcode() == 0xF0) { m_is_branch = true; } // BEQ
+    if (instr.opcode() == 0x80) { m_is_jump = true; }   // BRA
+    if (instr.opcode() == 0x4C) { m_is_jump = true; }   // JMP a
+    if (instr.opcode() == 0x6C) { m_is_jump = true; }   // JMP (a)
+    if (instr.opcode() == 0x7C) { m_is_jump = true; }   // JMP (a,x)
+}
+
+QString DisassembledItem::disassembledString() {
+    QString retval = rawDisassembledString();
+    if (hasArg()) {
+        if (retval.contains("_ARG16_")) {
+            retval.replace("_ARG16_","$"+arg16Str());
+        } else if (retval.contains("_ARG8_")) {
+            retval.replace("_ARG8_","$"+arg8Str());
+        }
+    }
+    return retval;
+}
+
+void DisassembledItem::init() {
+    m_address = m_target_address = 0;
+    m_is_jump = m_is_branch = m_is_jsr = false;
+    m_unknown_ta = true;
+    m_raw_arg = 0;
+    m_has_arg = false;
+}
diff --git a/src/binaryfile/disassembler.h b/src/binaryfile/disassembler.h
index 82947b7..aea9843 100644
--- a/src/binaryfile/disassembler.h
+++ b/src/binaryfile/disassembler.h
@@ -29,11 +29,7 @@ struct AssyInstruction {
 
 public:
 
-    AssyInstruction(quint8 opcode = 0x00, QString mnemonic = "???", AddressMode am = AM_InvalidOp) {
-        m_opcode = opcode;
-        m_mnemonic = mnemonic;
-        m_addressMode = am;
-    }
+    AssyInstruction(quint8 opcode = 0x00, QString mnemonic = "???", AddressMode am = AM_InvalidOp);
 
     AddressMode addressMode() { return m_addressMode; }
 
@@ -41,32 +37,7 @@ public:
 
     quint8 opcode() { return m_opcode; }
 
-
-
-    quint8 numArgs() {
-        switch (m_addressMode) {
-        case AM_Absolute:
-        case AM_AbsoluteIndexedIndirect:
-        case AM_AbsoluteIndexedWithX:
-        case AM_AbsoluteIndexedWithY:
-        case AM_AbsoluteIndirect:
-            return 2;
-        case AM_ProgramCounterRelative:
-        case AM_ZeroPage:
-        case AM_ZeroPageIndirectIndexedWithY:
-        case AM_ZeroPageIndexedIndirect:
-        case AM_ZeroPageIndexedWithX:
-        case AM_ZeroPageIndexedWithY:
-        case AM_ZeroPageIndirect:
-        case AM_Immediate:
-            return 1;
-        case AM_InvalidOp:
-        case AM_Implied:
-        case AM_Accumulator:
-        default:
-            return 0;
-        }
-    }
+    quint8 numArgs();
 
 private:
     QString m_mnemonic;
@@ -79,27 +50,10 @@ class DisassembledItem {
 public:
     DisassembledItem() { init(); }
 
-    DisassembledItem(AssyInstruction instr) {
-        setInstruction(instr);
-    }
+    DisassembledItem(AssyInstruction instr);
 
 
-    void setInstruction(AssyInstruction instr) {
-        m_instruction = instr;
-        if (instr.opcode() == 0x20) { m_is_jsr = true; }
-        if (instr.opcode() == 0x10) { m_is_branch = true; } // BPL
-        if (instr.opcode() == 0x30) { m_is_branch = true; } // BMI
-        if (instr.opcode() == 0x50) { m_is_branch = true; } // BVC
-        if (instr.opcode() == 0x70) { m_is_branch = true; } // BVS
-        if (instr.opcode() == 0x90) { m_is_branch = true; } // BCC
-        if (instr.opcode() == 0xB0) { m_is_branch = true; } // BCS
-        if (instr.opcode() == 0xD0) { m_is_branch = true; } // BNE
-        if (instr.opcode() == 0xF0) { m_is_branch = true; } // BEQ
-        if (instr.opcode() == 0x80) { m_is_jump = true; }   // BRA
-        if (instr.opcode() == 0x4C) { m_is_jump = true; }   // JMP a
-        if (instr.opcode() == 0x6C) { m_is_jump = true; }   // JMP (a)
-        if (instr.opcode() == 0x7C) { m_is_jump = true; }   // JMP (a,x)
-    }
+    void setInstruction(AssyInstruction instr);
 
     void setAddress(quint16 add) { m_address = add; }
     void setDisassembledString(QString ds) { m_disassembly_text = ds; }
@@ -113,17 +67,7 @@ public:
 
     AssyInstruction assyInstruction() const { return m_instruction; }
     QString rawDisassembledString() const { return m_disassembly_text; }
-    QString disassembledString() {
-        QString retval = rawDisassembledString();
-        if (hasArg()) {
-            if (retval.contains("_ARG16_")) {
-                retval.replace("_ARG16_","$"+arg16Str());
-            } else if (retval.contains("_ARG8_")) {
-                retval.replace("_ARG8_","$"+arg8Str());
-            }
-        }
-        return retval;
-    }
+    QString disassembledString();
     quint16 address()  const { return m_address; }
     QString hexAddress() const { return QString("%1").arg(m_address,4,16,QChar('0')).toUpper(); }
     QByteArray hexValues() const { return m_hexvalues; }
@@ -142,13 +86,7 @@ public:
     QString arg8Str() { return QString("%1").arg(arg8(),2,16,QChar('0')).toUpper(); }
 
 private:
-    void init() {
-        m_address = m_target_address = 0;
-        m_is_jump = m_is_branch = m_is_jsr = false;
-        m_unknown_ta = true;
-        m_raw_arg = 0;
-        m_has_arg = false;
-    }
+    void init();
 
     quint16 m_address;
     QByteArray m_hexvalues;