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1 | typedef unsigned char u8; | |
2 | ||
3 | u8 i0, i1, i2; //MEM | |
4 | u8 acc; //ACC | |
5 | ||
6 | u8 notes[] = { | |
7 | 0x84, 0x9d, 0xb0, 0x69, 0x9d, 0x84, 0x69, 0x58, | |
8 | 0x75, 0x8c, 0xb0, 0x69, 0x8c, 0x75, 0x69, 0x58 | |
9 | }; | |
10 | ||
11 | void g(u8 t){ | |
12 | u8 notes_ix = t & 0x7; | |
13 | if(3&i2) | |
14 | notes_ix += 8; | |
15 | u8 result = ((i1<<8|i0)*notes[notes_ix])>>8; // keep hi byte | |
16 | acc = result; | |
17 | } | |
18 | void main(void){ | |
19 | i0 = i1 = i2 = 0; | |
20 | // clear i0 | |
21 | // clear i1 | |
22 | // clear i2 | |
23 | for(;;) { | |
24 | u8 sample; | |
25 | u8 n = i2<<2 | i1>>6; //MEM | |
26 | // mov n, i2 | |
27 | // sl n | |
28 | // sl n | |
29 | // mov acc, i1 | |
30 | // swap acc | |
31 | // and acc, 0xf | |
32 | // sr acc | |
33 | // sr acc | |
34 | // or n, acc | |
35 | ||
36 | g(n); | |
37 | //^TODO | |
38 | acc >>= 4; | |
39 | // swap acc | |
40 | acc &= 1; | |
41 | // and acc, 0x1 | |
42 | sample = acc; | |
43 | // mov sample, acc | |
44 | ||
45 | { u8 tmp; | |
46 | tmp = i2<<3 | i1>>5; | |
47 | tmp ^= n; | |
48 | g(tmp); | |
49 | //^TODO | |
50 | } //tmp | |
51 | acc >>= 1; | |
52 | // sr acc | |
53 | acc &= i2; | |
54 | // and acc, i2 | |
55 | acc >>= 1; | |
56 | // sr acc | |
57 | acc &= 3; | |
58 | // and acc, 3 | |
59 | sample += acc; | |
60 | // add sample, acc | |
61 | ||
62 | { u8 tmp2; | |
63 | tmp2 = (i2<<5|i1>>3)%3; | |
64 | tmp2 += n; | |
65 | g(tmp2); | |
66 | //^TODO | |
67 | } //tmp2 | |
68 | acc >>= 2; | |
69 | // sr acc | |
70 | // sr acc | |
71 | { u8 tmp1 = i2/6; | |
72 | acc &= tmp1; | |
73 | //^TODO | |
74 | } //tmp1 | |
75 | acc &= 3; | |
76 | // and acc, 3 | |
77 | sample += acc; | |
78 | // add sample, acc | |
79 | ||
80 | { u8 tmp2 = n; | |
81 | { u8 tmp3 = (i2<<6|i1>>2)%3; | |
82 | tmp2 -= tmp3; | |
83 | } // tmp3 | |
84 | tmp2 += 8; | |
85 | g(tmp2); | |
86 | } //tmp2 | |
87 | acc >>= 1; | |
88 | { u8 tmp1 = i2/10; | |
89 | acc &= tmp1; | |
90 | } //tmp1 | |
91 | acc &= 3; | |
92 | sample += acc; | |
93 | ||
94 | putchar(sample<<4); | |
95 | ||
96 | i0++; | |
97 | i1 += !i0; | |
98 | i2 += !i1 && !i0; | |
99 | } | |
100 | } |