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
129
130
131
132
133
|
import { CPU, ICPU } from './cpu';
import { avrInstruction } from './instruction';
describe('avrInstruction', () => {
let cpu: CPU;
beforeEach(() => {
cpu = new CPU(new Uint16Array(0x8000));
});
function loadProgram(bytes: string) {
const progBuf = cpu.progBytes;
for (let i = 0; i < bytes.length; i += 2) {
progBuf[i / 2] = parseInt(bytes.substr(i, 2), 16);
}
}
it('should execute `CPC r27, r18` instruction', () => {
loadProgram('b207');
cpu.data[18] = 0x1;
cpu.data[27] = 0x1;
avrInstruction(cpu);
expect(cpu.pc).toEqual(1);
expect(cpu.cycles).toEqual(1);
expect(cpu.data[95]).toEqual(0); // SREG 00000000
});
it('should execute `CPI r26, 0x9` instruction', () => {
loadProgram('a930');
cpu.data[26] = 0x8;
avrInstruction(cpu);
expect(cpu.pc).toEqual(1);
expect(cpu.cycles).toEqual(1);
expect(cpu.data[95]).toEqual(53); // SREG 00110101 - HSNC
});
it('should execute `JMP 0xb8` instruction', () => {
loadProgram('0c945c00');
avrInstruction(cpu);
expect(cpu.pc).toEqual(0x5c);
expect(cpu.cycles).toEqual(3);
});
it('should execute `OUT 0x3f, r1` instruction', () => {
loadProgram('1fbe');
cpu.data[1] = 0x5a; // put the value 5a in r1
avrInstruction(cpu);
expect(cpu.pc).toEqual(0x1);
expect(cpu.cycles).toEqual(1);
expect(cpu.data[0x5f]).toEqual(0x5a);
});
it('should execute `LDI r28, 0xff` instruction', () => {
loadProgram('cfef');
avrInstruction(cpu);
expect(cpu.pc).toEqual(0x1);
expect(cpu.cycles).toEqual(1);
expect(cpu.data[28]).toEqual(0xff);
});
it('should execute `LD r1, X` instruction', () => {
loadProgram('1c90');
cpu.data[0xc0] = 0x15;
cpu.data[26] = 0xc0; // X <- 0xc0
avrInstruction(cpu);
expect(cpu.pc).toEqual(1);
expect(cpu.cycles).toEqual(1);
expect(cpu.data[1]).toEqual(0x15);
expect(cpu.data[26]).toEqual(0xc0); // verify that X was unchanged
});
it('should execute `LD r17, X+` instruction', () => {
loadProgram('1d91');
cpu.data[0xc0] = 0x15;
cpu.data[26] = 0xc0; // X <- 0x9a
avrInstruction(cpu);
expect(cpu.pc).toEqual(1);
expect(cpu.cycles).toEqual(2);
expect(cpu.data[0xc0]).toEqual(0x15);
expect(cpu.data[26]).toEqual(0xc1); // verify that X was incremented
});
it('should execute `LD r1, -X` instruction', () => {
loadProgram('1e90');
cpu.data[0x98] = 0x22;
cpu.data[26] = 0x99; // X <- 0x99
avrInstruction(cpu);
expect(cpu.pc).toEqual(1);
expect(cpu.cycles).toEqual(3);
expect(cpu.data[1]).toEqual(0x22);
expect(cpu.data[26]).toEqual(0x98); // verify that X was decremented
});
it('should execute `RJMP 2` instruction', () => {
loadProgram('01c0');
avrInstruction(cpu);
expect(cpu.pc).toEqual(2);
expect(cpu.cycles).toEqual(2);
});
it('should execute `ST X, r1` instruction', () => {
loadProgram('1c92');
cpu.data[1] = 0x5a; // r1 <- 0x5a
cpu.data[26] = 0x9a; // X <- 0x9a
avrInstruction(cpu);
expect(cpu.pc).toEqual(1);
expect(cpu.cycles).toEqual(1);
expect(cpu.data[0x9a]).toEqual(0x5a);
expect(cpu.data[26]).toEqual(0x9a); // verify that X was unchanged
});
it('should execute `ST X+, r1` instruction', () => {
loadProgram('1d92');
cpu.data[1] = 0x5a; // r1 <- 5a
cpu.data[26] = 0x9a; // X <- 0x9a
avrInstruction(cpu);
expect(cpu.pc).toEqual(1);
expect(cpu.cycles).toEqual(1);
expect(cpu.data[0x9a]).toEqual(0x5a);
expect(cpu.data[26]).toEqual(0x9b); // verify that X was incremented
});
it('should execute `ST -X, r17` instruction', () => {
loadProgram('1e93');
cpu.data[17] = 0x88; // r17 <- 0x88
cpu.data[26] = 0x99; // X <- 0x99
avrInstruction(cpu);
expect(cpu.pc).toEqual(1);
expect(cpu.cycles).toEqual(2);
expect(cpu.data[0x98]).toEqual(0x88);
expect(cpu.data[26]).toEqual(0x98); // verify that X was decremented
});
});
|
