Emulator: Change register af 16-bit => a 8-bit

src/cpu.cpp

@@ -33,13 +33,13 @@ void CPU::add(uint8_t byte, uint8_t immediate)
 		// clock += 8;
 
 		// Flags: Z0HC
-		m_z = (m_af >> 8) + immediate == 0;
+		m_z = m_a + immediate == 0;
 		m_n = 0;
-		m_h = (m_af >> 8) + immediate > 16;
+		m_h = m_a + immediate > 16;
-		m_c = (m_af >> 8) + immediate > 255;
+		m_c = m_a + immediate > 255;
 
 		// A = A + r
-		m_af = m_af + (immediate << 8);
+		m_a += immediate;
 		break;
 	default:
 		break;

src/cpu.h

@@ -37,15 +37,15 @@ public:
 	// Miscellaneous Instructions
 
 private:
-	// 16-bit registers
+	// Registers
-	uint16_t m_af { 0 }; // Accumulator & Flags
+	uint8_t m_a { 0 };   // Accumulator
 	uint16_t m_bc { 0 }; // BC
 	uint16_t m_de { 0 }; // DE
 	uint16_t m_hl { 0 }; // HL
 	uint16_t m_sp { 0 }; // Stack Pointer
 	uint16_t m_pc { 0 }; // Program Counter
 
-	// 8-bit registers (flags)
+	// Flags
 	uint8_t m_z { 0 }; // Zero flag
 	uint8_t m_n { 0 }; // Subtraction flag (BCD)
 	uint8_t m_h { 0 }; // Half Carry flag (BCD)