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Rev | Author | Line No. | Line |
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479 | kastigar | 1 | ;************************************** |
2 | ;* ОБРАБОТЧИК ПРЕРЫВАНИЯ ОТ МЫШИ PS/2 * |
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3 | ;************************************** |
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4 | |||
5 | proc irq_handler |
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6 | |||
7 | call Wait8042BufferEmpty ;очистка буфера |
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8 | in al,0x60 ;получить скэн-код |
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9 | |||
10 | cmp [mouse_byte],0 |
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11 | je .byte1 |
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12 | cmp [mouse_byte],1 |
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13 | je .byte2 |
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14 | cmp [mouse_byte],2 |
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15 | je .byte3 |
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16 | cmp [mouse_byte],3 |
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17 | je .byte4 |
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18 | jmp .error |
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19 | |||
20 | .byte1: |
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21 | test al,1000b ;первый байт посылки? |
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22 | jz .error ;сбой синхронизации |
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23 | mov [first_byte],al |
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24 | inc [mouse_byte] |
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25 | jmp .exit |
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26 | |||
27 | .byte2: |
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28 | mov [second_byte],al |
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29 | inc [mouse_byte] |
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30 | jmp .exit |
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31 | |||
32 | .byte3: |
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33 | mov [third_byte],al |
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34 | cmp [MouseType],MT_3B |
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35 | je .full_packet |
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36 | inc [mouse_byte] |
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37 | jmp .exit |
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38 | |||
39 | .byte4: |
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40 | mov [fourth_byte],al |
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41 | |||
42 | |||
43 | .full_packet: |
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44 | mov [mouse_byte],0 |
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45 | mov al,byte [first_byte] |
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46 | and eax,7 |
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47 | mov byte [ButtonState],al |
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48 | |||
49 | cmp [MouseType],MT_3B |
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50 | je .xy_moving |
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51 | mov al,[fourth_byte] |
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52 | cmp [MouseType],MT_3BScroll |
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53 | je .z_moving |
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54 | |||
55 | mov ah,al |
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56 | and ah,00110000b |
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57 | shr ah,1 |
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58 | or byte [ButtonState],ah |
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59 | and al,00001111b |
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60 | bt eax,3 |
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61 | jnc .z_moving |
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62 | or al,11110000b |
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63 | |||
64 | .z_moving: |
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65 | movsx eax,al |
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66 | mov [ZMoving],eax |
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67 | |||
68 | .xy_moving: |
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69 | mov ah,0 ;дублируем знак во все разряды AH |
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70 | mov al,[first_byte] |
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71 | test al,10000b |
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72 | jz @f |
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73 | mov ah,0FFh |
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74 | |||
75 | @@: |
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76 | mov al,[second_byte] |
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77 | cwd |
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78 | mov [XMoving],eax |
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79 | |||
80 | mov ah,0 ;дублируем знак во все разряды AH |
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81 | mov al,[first_byte] |
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82 | test al,100000b |
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83 | jz @f |
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84 | mov ah,0FFh |
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85 | |||
86 | @@: |
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87 | mov al,[third_byte] |
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88 | cwd |
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89 | |||
90 | @@: |
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91 | mov [YMoving],eax |
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92 | stdcall SetMouseData, [ButtonState], [XMoving], [YMoving], [ZMoving], 0 |
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93 | |||
94 | |||
95 | jmp .exit |
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96 | |||
97 | .error: |
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98 | mov [mouse_byte],0 |
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99 | |||
100 | .exit: |
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101 | ret |
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102 | endp |
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103 | |||
104 | |||
105 | ;*********************************************** |
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106 | ;* ОЖИДАНИЕ ОЧИСТКИ ВХОДНОГО БУФЕРА I8042 * |
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107 | ;* При выходе из процедуры: * |
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108 | ;* флаг ZF установлен - нормальное завершение, * |
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109 | ;* флаг ZF сброшен - ошибка тайм-аута. * |
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110 | ;*********************************************** |
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111 | Wait8042BufferEmpty: |
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112 | push ecx |
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113 | xor ecx,ecx |
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114 | @@: |
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115 | in al,64h |
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116 | test al,00000010b |
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117 | loopnz @b |
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118 | pop ecx |
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119 | |||
120 | ret ;возврат в подпрограмму |