attempted to fix flag handling of PLP

cpu.c

@@ -344,6 +344,8 @@ void PLP_(State6502* state) {
 	byte value = pop_byte_from_stack(state);
 	//we don't read the BRK flag
 	value &= ~(1 << 4);
+	//the bit 5 always comes in as true
+	value |= 1 << 5;
 	memset(&state->flags, value, sizeof(Flags));
 }
 
@@ -353,7 +355,6 @@ void PHP_(State6502* state) {
 	push_byte_to_stack(state, flags_value);
 }
 
-
 int emulate_6502_op(State6502 * state) {
 	byte* opcode = &state->memory[state->pc++];
 	switch (*opcode) {

test6502.c

@@ -1987,7 +1987,33 @@ void test_PLP2() {
 	assert_flag_z(&state, 0);
 	assert_flag_v(&state, 0);
 	assert_flag_n(&state, 0);
-	assert_flag_i(&state, 0);
+	assert_flag_i(&state, 1);
+
+	//cleanup
+	test_cleanup(&state);
+}
+
+void test_PHA_PLP() {
+	State6502 state = create_blank_state();
+
+	//arrange
+	char program[] = { LDA_IMM, 0x04, PHA, PLP };
+	memcpy(state.memory, program, sizeof(program));
+
+	//act
+	test_step(&state);
+
+	assertA(&state, 0x04);
+
+	//assert	
+	assert_sp(&state, 0xFF);
+	assert_flag_c(&state, 0);
+	assert_flag_d(&state, 0);
+	assert_flag_b(&state, 0);
+	assert_flag_z(&state, 0);
+	assert_flag_v(&state, 0);
+	assert_flag_n(&state, 0);
+	assert_flag_i(&state, 1);
 
 	//cleanup
 	test_cleanup(&state);