diff --git a/OSBindings/Mac/Clock SignalTests/Bridges/TestMachineZ80.h b/OSBindings/Mac/Clock SignalTests/Bridges/TestMachineZ80.h
index 5ffaf2ed6..a7e6d7612 100644
--- a/OSBindings/Mac/Clock SignalTests/Bridges/TestMachineZ80.h	
+++ b/OSBindings/Mac/Clock SignalTests/Bridges/TestMachineZ80.h	
@@ -62,4 +62,6 @@ typedef NS_ENUM(NSInteger, CSTestMachineZ80Register) {
 @property(nonatomic, assign) BOOL captureBusActivity;
 @property(nonatomic, readonly) NSArray<CSTestMachineZ80BusOperationCapture *> *busOperationCaptures;
 
+@property(nonatomic, readonly) BOOL isHalted;
+
 @end
diff --git a/OSBindings/Mac/Clock SignalTests/Bridges/TestMachineZ80.mm b/OSBindings/Mac/Clock SignalTests/Bridges/TestMachineZ80.mm
index 2dd3109a0..ab014dbe9 100644
--- a/OSBindings/Mac/Clock SignalTests/Bridges/TestMachineZ80.mm	
+++ b/OSBindings/Mac/Clock SignalTests/Bridges/TestMachineZ80.mm	
@@ -154,6 +154,10 @@ static CPU::Z80::Register registerForRegister(CSTestMachineZ80Register reg) {
 	[self.trapHandler testMachine:self didTrapAtAddress:address];
 }
 
+- (BOOL)isHalted {
+	return _processor.get_halt_line() ? YES : NO;
+}
+
 #pragma mark - Z80-specific Runner
 
 - (void)runToNextInstruction {
diff --git a/OSBindings/Mac/Clock SignalTests/FUSETests.swift b/OSBindings/Mac/Clock SignalTests/FUSETests.swift
index 68ce9a7ba..004bfed6e 100644
--- a/OSBindings/Mac/Clock SignalTests/FUSETests.swift	
+++ b/OSBindings/Mac/Clock SignalTests/FUSETests.swift	
@@ -113,8 +113,8 @@ fileprivate struct RegisterState {
 
 		interruptMode = Int(machine.value(for: .IM))
 
-		isHalted = false	// TODO
-		tStates = 0			// TODO
+		isHalted = machine.isHalted
+		tStates = 0			// TODO	 (?)
 	}
 }
 
@@ -137,7 +137,8 @@ fileprivate func ==(lhs: RegisterState, rhs: RegisterState) -> Bool {
 			lhs.r == rhs.r &&
 			lhs.iff1 == rhs.iff1 &&
 			lhs.iff2 == rhs.iff2 &&
-			lhs.interruptMode == rhs.interruptMode
+			lhs.interruptMode == rhs.interruptMode &&
+			lhs.isHalted == rhs.isHalted
 }
 
 class FUSETests: XCTestCase {
diff --git a/Processors/Z80/Z80.hpp b/Processors/Z80/Z80.hpp
index 95a86f0e4..116d4181a 100644
--- a/Processors/Z80/Z80.hpp
+++ b/Processors/Z80/Z80.hpp
@@ -129,7 +129,9 @@ struct MicroOp {
 
 		SetInstructionPage,
 		CalculateIndexAddress,
+
 		RETN,
+		HALT,
 
 		DJNZ,
 		DAA,
@@ -177,6 +179,7 @@ template <class T> class Processor: public MicroOpScheduler<MicroOp> {
 		bool iff1_, iff2_;
 		int interrupt_mode_;
 		uint8_t sign_result_, zero_result_, bit5_result_, half_carry_flag_, bit3_result_, parity_overflow_flag_, subtract_flag_, carry_flag_;
+		bool is_halted_;
 
 		int number_of_cycles_;
 
@@ -547,7 +550,7 @@ template <class T> class Processor: public MicroOpScheduler<MicroOp> {
 				/* 0x73 LD (HL), E */	Program(INDEX(), STOREL(de_.bytes.low, INDEX_ADDR())),
 				/* 0x74 LD (HL), H */	Program(INDEX(), STOREL(hl_.bytes.high, INDEX_ADDR())),	// neither of these stores parts of the index register;
 				/* 0x75 LD (HL), L */	Program(INDEX(), STOREL(hl_.bytes.low, INDEX_ADDR())),	// they always store exactly H and L.
-				/* 0x76 HALT */			XX,
+				/* 0x76 HALT */			Program({MicroOp::HALT}),
 				/* 0x77 LD (HL), A */	Program(INDEX(), STOREL(a_, INDEX_ADDR())),
 
 				/* 0x78 LD A, B;  0x79 LD A, C;	0x7a LD A, D;	0x7b LD A, E;	0x7c LD A, H;	0x7d LD A, L;	0x7e LD A, (HL);	0x7f LD A, A */
@@ -641,7 +644,7 @@ template <class T> class Processor: public MicroOpScheduler<MicroOp> {
 		}
 
 	public:
-		Processor() : MicroOpScheduler() {
+		Processor() : MicroOpScheduler(), is_halted_(false) {
 			assemble_base_page(base_page_, hl_, false, cb_page_);
 			assemble_base_page(dd_page_, ix_, true, ddcb_page_);
 			assemble_base_page(fd_page_, iy_, true, fdcb_page_);
@@ -1374,12 +1377,17 @@ template <class T> class Processor: public MicroOpScheduler<MicroOp> {
 						temp8_ = 0;
 					break;
 
-#pragma mark - Return
+#pragma mark - Special-case Flow
 
 					case MicroOp::RETN:
 						iff1_ = iff2_;
 					break;
 
+					case MicroOp::HALT:
+						is_halted_ = true;
+						pc_.full --;
+					break;
+
 #pragma mark - Internal bookkeeping
 
 					case MicroOp::SetInstructionPage:
@@ -1570,6 +1578,13 @@ template <class T> class Processor: public MicroOpScheduler<MicroOp> {
 				default: break;
 			}
 		}
+
+		/*!
+			Gets the value of the HALT output line.
+		*/
+		bool get_halt_line() {
+			return is_halted_;
+		}
 };
 
 }