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Rev | Author | Line No. | Line |
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485 | heavyiron | 1 | ; |
2 | ; Mathematical functions |
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3 | ; |
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4 | ; Author: Trans |
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5 | ; Date: 08.03.2005 |
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6 | ; Compiler: FASM |
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7 | ; Target: Hunter - MeOS game |
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8 | ; |
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9 | |||
10 | rinit dw 0 |
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11 | |||
12 | ; Randomize of 8 bits |
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13 | ; In: |
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14 | ; Out: AL - random value |
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15 | random_8: |
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16 | push ebx |
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17 | push ecx |
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18 | xor eax,eax |
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19 | mov ax,[rinit] |
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20 | cmp ax,0 |
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21 | jnz rand_loc_00 |
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22 | mov eax,26 |
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23 | mov ebx,9 |
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24 | int 40h |
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25 | mov [rinit],ax |
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26 | shl eax,16 |
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27 | shr eax,16 |
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28 | rand_loc_00: |
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29 | mov ecx,8 |
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30 | rand_loc_01: |
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31 | mov bx,ax |
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32 | and bx,002Dh |
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33 | xor bh,bl |
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34 | clc |
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35 | jpe rand_loc_01a |
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36 | stc |
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37 | rand_loc_01a: |
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38 | rcr ax,1 |
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39 | loop rand_loc_01 |
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40 | mov [rinit],ax |
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41 | xor ah,ah |
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42 | pop ecx |
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43 | pop ebx |
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44 | retn |