Merge pull request #136 from TomHarte/ZX8081Options

Finally adjusts ZX80/81 tape loading so that the fast loading hack is optional as per the GUI

Machines/ZX8081/ZX8081.cpp

@@ -21,7 +21,8 @@ Machine::Machine() :
 	vsync_(false),
 	hsync_(false),
 	nmi_is_enabled_(false),
-	tape_player_(ZX8081ClockRate) {
+	tape_player_(ZX8081ClockRate),
+	use_fast_tape_hack_(false) {
 	set_clock_rate(ZX8081ClockRate);
 	tape_player_.set_motor_control(true);
 	clear_all_keys();
@@ -118,7 +119,7 @@ int Machine::perform_machine_cycle(const CPU::Z80::PartialMachineCycle &cycle) {
 		case CPU::Z80::PartialMachineCycle::ReadOpcodeStart:
 		case CPU::Z80::PartialMachineCycle::ReadOpcodeWait:
 			// Check for use of the fast tape hack.
-/*			if(address == tape_trap_address_) { // TODO: && fast_tape_hack_enabled_
+			if(use_fast_tape_hack_ && address == tape_trap_address_) {
 				int next_byte = parser_.get_next_byte(tape_player_.get_tape());
 				if(next_byte != -1) {
 					uint16_t hl = get_value_of_register(CPU::Z80::Register::HL);
@@ -127,7 +128,7 @@ int Machine::perform_machine_cycle(const CPU::Z80::PartialMachineCycle &cycle) {
 					set_value_of_register(CPU::Z80::Register::ProgramCounter, tape_return_address_ - 1);
 					return 0;
 				}
-			}*/
+			}
 			is_opcode_read = true;
 
 		case CPU::Z80::PartialMachineCycle::Read:

Machines/ZX8081/ZX8081.hpp

@@ -62,6 +62,8 @@ class Machine:
 		void set_key_state(uint16_t key, bool isPressed);
 		void clear_all_keys();
 
+		inline void set_use_fast_tape_hack(bool activate) { use_fast_tape_hack_ = activate; }
+
 	private:
 		std::shared_ptr<Video> video_;
 		std::vector<uint8_t> zx81_rom_, zx80_rom_;
@@ -90,6 +92,8 @@ class Machine:
 		bool nmi_is_enabled_;
 		int vsync_start_cycle_, vsync_end_cycle_;
 		uint8_t latched_video_byte_;
+
+		bool use_fast_tape_hack_;
 };
 
 }

OSBindings/Mac/Clock Signal/Machine/Wrappers/CSZX8081.mm

@@ -101,4 +101,13 @@
 
 - (NSString *)userDefaultsPrefix {	return @"zx8081";	}
 
+#pragma mark - Options
+
+- (void)setUseFastLoadingHack:(BOOL)useFastLoadingHack {
+	@synchronized(self) {
+		_useFastLoadingHack = useFastLoadingHack;
+		_zx8081.set_use_fast_tape_hack(useFastLoadingHack ? true : false);
+	}
+}
+
 @end