iz80 0.5.1

Z80 and 8080 emulator
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128

use iz80::*;

#[test]
fn test_djnz_jump() {
    let mut sys = PlainMachine::new();
    let mut cpu = Cpu::new();

    sys.poke(0x0000, 0x10);  // DJNZ +$08
    sys.poke(0x0001, 0x06); 
    cpu.registers().set8(Reg8::B, 0x23);

    cpu.execute_instruction(&mut sys);
    assert_eq!(0x22, cpu.registers().get8(Reg8::B));
    assert_eq!(0x0008, cpu.registers().pc());
}

#[test]
fn test_djnz_no_jump() {
    let mut sys = PlainMachine::new();
    let mut cpu = Cpu::new();

    sys.poke(0x0000, 0x10);  // DJNZ +$08
    sys.poke(0x0001, 0x06); 
    cpu.registers().set8(Reg8::B, 0x01);

    cpu.execute_instruction(&mut sys);
    assert_eq!(0x00, cpu.registers().get8(Reg8::B));
    assert_eq!(0x0002, cpu.registers().pc());
}

#[test]
fn test_jr_z_jump() {
    let mut sys = PlainMachine::new();
    let mut cpu = Cpu::new();

    sys.poke(0x0000, 0x10);  // JR -$02
    sys.poke(0x0001, 0xfc); 
    cpu.registers().set_flag(Flag::Z);

    cpu.execute_instruction(&mut sys);
    assert_eq!(0xFFFE, cpu.registers().pc());
}

#[test]
fn test_jp() {
    let mut sys = PlainMachine::new();
    let mut cpu = Cpu::new();

    sys.poke(0x0000, 0xc3);  // JP $2000
    sys.poke(0x0001, 0x00); 
    sys.poke(0x0002, 0x20);
    
    cpu.execute_instruction(&mut sys);
    assert_eq!(0x2000, cpu.registers().pc());
}

#[test]
fn test_call() {
    let mut sys = PlainMachine::new();
    let mut cpu = Cpu::new();

    sys.poke(0x0000, 0xcd);  // CALL $2000
    sys.poke(0x0001, 0x00); 
    sys.poke(0x0002, 0x20);
    
 
    cpu.execute_instruction(&mut sys);
    assert_eq!(0x2000, cpu.registers().pc());
    //assert_eq!(0x0003, cpu.env.pop());
}

#[test]
fn test_call_z_jump() {
    let mut sys = PlainMachine::new();
    let mut cpu = Cpu::new();

    sys.poke(0x0000, 0xcc);  // CALL Z $2000
    sys.poke(0x0001, 0x00); 
    sys.poke(0x0002, 0x20);
    cpu.registers().set_flag(Flag::Z);
     
    cpu.execute_instruction(&mut sys);
    assert_eq!(0x2000, cpu.registers().pc());
    //assert_eq!(0x0003, cpu.env.pop());
}

#[test]
fn test_call_z_no_jump() {
    let mut sys = PlainMachine::new();
    let mut cpu = Cpu::new();

    sys.poke(0x0000, 0xcc);  // CALL Z $2000
    sys.poke(0x0001, 0x00); 
    sys.poke(0x0002, 0x20);
    cpu.registers().clear_flag(Flag::Z);
     
    cpu.execute_instruction(&mut sys);
    assert_eq!(0x0003, cpu.registers().pc());
}

#[test]
fn test_rst() {
    let mut sys = PlainMachine::new();
    let mut cpu = Cpu::new();

    sys.poke(0x0000, 0xff);  // RST 38h    
 
    cpu.execute_instruction(&mut sys);
    assert_eq!(0x0038, cpu.registers().pc());
    //assert_eq!(0x0001, cpu.env.pop());
}

#[test]
fn test_call_ret() {
    let mut sys = PlainMachine::new();
    let mut cpu = Cpu::new();

    sys.poke(0x0000, 0xcd);  // CALL $2000
    sys.poke(0x0001, 0x00); 
    sys.poke(0x0002, 0x20);

    sys.poke(0x2000, 0xc9);  // RET
    
    cpu.execute_instruction(&mut sys);
    assert_eq!(0x2000, cpu.registers().pc());
     cpu.execute_instruction(&mut sys);
    assert_eq!(0x0003, cpu.registers().pc());
}