1 | /*
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2 | =============================================================================
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3 | gcurpos.c -- MIDAS cursor arrow functions and arrow object definitions
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4 | Version 16 -- 1988-03-11 -- D.N. Lynx Crowe
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5 | =============================================================================
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6 | */
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7 |
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8 | #include "ram.h"
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9 |
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10 | #define YOFF 15 /* y pixel offset */
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11 | #define XOFF 14 /* x pixel offset */
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12 |
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13 | /* 4 bit pixel patterns */
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14 |
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15 | #define AW_0 0x0000
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16 | #define AW_1 0xF000
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17 | #define AW_2 0x0F00
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18 | #define AW_3 0xFF00
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19 | #define AW_4 0x00F0
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20 | #define AW_5 0xF0F0
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21 | #define AW_6 0x0FF0
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22 | #define AW_7 0xFFF0
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23 | #define AW_8 0x000F
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24 | #define AW_9 0xF00F
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25 | #define AW_A 0x0F0F
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26 | #define AW_B 0xFF0F
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27 | #define AW_C 0x00FF
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28 | #define AW_D 0xF0FF
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29 | #define AW_E 0x0FFF
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30 | #define AW_F 0xFFFF
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31 |
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32 | /* |
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33 |
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34 | */
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35 |
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36 | static uint16_t ar_ule[] = { /* upper left even pixel arrow */
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37 |
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38 | AW_F, AW_0, AW_0, AW_0, /* 0 */
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39 | AW_C, AW_0, AW_0, AW_0, /* 1 */
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40 | AW_A, AW_0, AW_0, AW_0, /* 2 */
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41 | AW_9, AW_0, AW_0, AW_0, /* 3 */
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42 | AW_0, AW_8, AW_0, AW_0, /* 4 */
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43 | AW_0, AW_4, AW_0, AW_0, /* 5 */
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44 | AW_0, AW_2, AW_0, AW_0, /* 6 */
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45 | AW_0, AW_1, AW_0, AW_0, /* 7 */
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46 | AW_0, AW_0, AW_8, AW_0, /* 8 */
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47 | AW_0, AW_0, AW_7, AW_8, /* 9 */
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48 | AW_0, AW_0, AW_6, AW_0, /* 10 */
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49 | AW_0, AW_0, AW_5, AW_E, /* 11 */
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50 | AW_0, AW_0, AW_5, AW_8, /* 12 */
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51 | AW_0, AW_0, AW_1, AW_4, /* 13 */
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52 | AW_0, AW_0, AW_1, AW_2, /* 14 */
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53 | AW_0, AW_0, AW_0, AW_0 /* 15 */
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54 | };
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55 |
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56 | static uint16_t ar_ulo[] = { /* upper left odd pixel arrow */
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57 |
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58 | AW_7, AW_8, AW_0, AW_0, /* 0 */
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59 | AW_6, AW_0, AW_0, AW_0, /* 1 */
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60 | AW_5, AW_0, AW_0, AW_0, /* 2 */
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61 | AW_4, AW_8, AW_0, AW_0, /* 3 */
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62 | AW_0, AW_4, AW_0, AW_0, /* 4 */
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63 | AW_0, AW_2, AW_0, AW_0, /* 5 */
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64 | AW_0, AW_1, AW_0, AW_0, /* 6 */
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65 | AW_0, AW_0, AW_8, AW_0, /* 7 */
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66 | AW_0, AW_0, AW_4, AW_0, /* 8 */
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67 | AW_0, AW_0, AW_3, AW_C, /* 9 */
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68 | AW_0, AW_0, AW_3, AW_0, /* 10 */
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69 | AW_0, AW_0, AW_2, AW_F, /* 11 */
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70 | AW_0, AW_0, AW_2, AW_C, /* 12 */
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71 | AW_0, AW_0, AW_0, AW_A, /* 13 */
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72 | AW_0, AW_0, AW_0, AW_9, /* 14 */
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73 | AW_0, AW_0, AW_0, AW_0 /* 15 */
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74 | };
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75 |
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76 | /* |
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77 |
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78 | */
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79 |
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80 | static uint16_t ar_ure[] = { /* upper right even pixel arrow */
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81 |
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82 | AW_0, AW_0, AW_1, AW_E, /* 0 */
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83 | AW_0, AW_0, AW_0, AW_6, /* 1 */
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84 | AW_0, AW_0, AW_0, AW_A, /* 2 */
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85 | AW_0, AW_0, AW_1, AW_2, /* 3 */
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86 | AW_0, AW_0, AW_2, AW_0, /* 4 */
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87 | AW_0, AW_0, AW_4, AW_0, /* 5 */
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88 | AW_0, AW_0, AW_8, AW_0, /* 6 */
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89 | AW_0, AW_1, AW_0, AW_0, /* 7 */
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90 | AW_0, AW_2, AW_0, AW_0, /* 8 */
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91 | AW_3, AW_C, AW_0, AW_0, /* 9 */
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92 | AW_0, AW_C, AW_0, AW_0, /* 10 */
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93 | AW_F, AW_4, AW_0, AW_0, /* 11 */
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94 | AW_3, AW_4, AW_0, AW_0, /* 12 */
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95 | AW_5, AW_0, AW_0, AW_0, /* 13 */
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96 | AW_9, AW_0, AW_0, AW_0, /* 14 */
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97 | AW_0, AW_0, AW_0, AW_0 /* 15 */
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98 | };
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99 |
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100 | static uint16_t ar_uro[] = { /* upper right odd pixel arrow */
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101 |
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102 | AW_0, AW_0, AW_0, AW_F, /* 0 */
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103 | AW_0, AW_0, AW_0, AW_3, /* 1 */
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104 | AW_0, AW_0, AW_0, AW_5, /* 2 */
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105 | AW_0, AW_0, AW_0, AW_9, /* 3 */
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106 | AW_0, AW_0, AW_1, AW_0, /* 4 */
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107 | AW_0, AW_0, AW_2, AW_0, /* 5 */
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108 | AW_0, AW_0, AW_4, AW_0, /* 6 */
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109 | AW_0, AW_0, AW_8, AW_0, /* 7 */
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110 | AW_0, AW_1, AW_0, AW_0, /* 8 */
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111 | AW_1, AW_E, AW_0, AW_0, /* 9 */
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112 | AW_0, AW_6, AW_0, AW_0, /* 10 */
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113 | AW_7, AW_A, AW_0, AW_0, /* 11 */
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114 | AW_1, AW_A, AW_0, AW_0, /* 12 */
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115 | AW_2, AW_8, AW_0, AW_0, /* 13 */
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116 | AW_4, AW_8, AW_0, AW_0, /* 14 */
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117 | AW_0, AW_0, AW_0, AW_0 /* 15 */
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118 | };
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119 |
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120 | /* |
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121 |
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122 | */
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123 |
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124 | static uint16_t ar_lle[] = { /* lower left even pixel arrow */
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125 |
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126 | AW_0, AW_0, AW_0, AW_0, /* 0 */
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127 | AW_0, AW_0, AW_1, AW_2, /* 1 */
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128 | AW_0, AW_0, AW_1, AW_4, /* 2 */
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129 | AW_0, AW_0, AW_5, AW_8, /* 3 */
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130 | AW_0, AW_0, AW_5, AW_E, /* 4 */
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131 | AW_0, AW_0, AW_6, AW_0, /* 5 */
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132 | AW_0, AW_0, AW_7, AW_8, /* 6 */
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133 | AW_0, AW_0, AW_8, AW_0, /* 7 */
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134 | AW_0, AW_1, AW_0, AW_0, /* 8 */
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135 | AW_0, AW_2, AW_0, AW_0, /* 9 */
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136 | AW_0, AW_4, AW_0, AW_0, /* 10 */
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137 | AW_0, AW_8, AW_0, AW_0, /* 11 */
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138 | AW_9, AW_0, AW_0, AW_0, /* 12 */
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139 | AW_A, AW_0, AW_0, AW_0, /* 13 */
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140 | AW_C, AW_0, AW_0, AW_0, /* 14 */
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141 | AW_F, AW_0, AW_0, AW_0 /* 15 */
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142 | };
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143 |
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144 | static uint16_t ar_llo[] = { /* lower left odd pixel arrow */
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145 |
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146 | AW_0, AW_0, AW_0, AW_0, /* 0 */
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147 | AW_0, AW_0, AW_0, AW_9, /* 1 */
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148 | AW_0, AW_0, AW_0, AW_A, /* 2 */
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149 | AW_0, AW_0, AW_2, AW_C, /* 3 */
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150 | AW_0, AW_0, AW_2, AW_F, /* 4 */
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151 | AW_0, AW_0, AW_3, AW_0, /* 5 */
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152 | AW_0, AW_0, AW_3, AW_C, /* 6 */
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153 | AW_0, AW_0, AW_4, AW_0, /* 7 */
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154 | AW_0, AW_0, AW_8, AW_0, /* 8 */
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155 | AW_0, AW_1, AW_0, AW_0, /* 9 */
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156 | AW_0, AW_2, AW_0, AW_0, /* 10 */
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157 | AW_0, AW_4, AW_0, AW_0, /* 11 */
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158 | AW_4, AW_8, AW_0, AW_0, /* 12 */
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159 | AW_5, AW_0, AW_0, AW_0, /* 13 */
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160 | AW_6, AW_0, AW_0, AW_0, /* 14 */
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161 | AW_7, AW_8, AW_0, AW_0 /* 15 */
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162 | };
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163 |
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164 | /* |
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165 |
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166 | */
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167 |
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168 | static uint16_t ar_lre[] = { /* lower right even pixel arrow */
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169 |
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170 | AW_0, AW_0, AW_0, AW_0, /* 0 */
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171 | AW_9, AW_0, AW_0, AW_0, /* 1 */
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172 | AW_5, AW_0, AW_0, AW_0, /* 2 */
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173 | AW_3, AW_4, AW_0, AW_0, /* 3 */
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174 | AW_F, AW_4, AW_0, AW_0, /* 4 */
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175 | AW_0, AW_C, AW_0, AW_0, /* 5 */
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176 | AW_3, AW_C, AW_0, AW_0, /* 6 */
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177 | AW_0, AW_2, AW_0, AW_0, /* 7 */
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178 | AW_0, AW_1, AW_0, AW_0, /* 8 */
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179 | AW_0, AW_0, AW_8, AW_0, /* 9 */
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180 | AW_0, AW_0, AW_4, AW_0, /* 10 */
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181 | AW_0, AW_0, AW_2, AW_0, /* 11 */
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182 | AW_0, AW_0, AW_1, AW_2, /* 12 */
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183 | AW_0, AW_0, AW_0, AW_A, /* 13 */
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184 | AW_0, AW_0, AW_0, AW_6, /* 14 */
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185 | AW_0, AW_0, AW_1, AW_E /* 15 */
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186 | };
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187 |
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188 | static uint16_t ar_lro[] = { /* lower right odd pixel arrow */
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189 |
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190 | AW_0, AW_0, AW_0, AW_0, /* 0 */
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191 | AW_4, AW_8, AW_0, AW_0, /* 1 */
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192 | AW_2, AW_8, AW_0, AW_0, /* 2 */
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193 | AW_1, AW_A, AW_0, AW_0, /* 3 */
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194 | AW_7, AW_A, AW_0, AW_0, /* 4 */
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195 | AW_0, AW_6, AW_0, AW_0, /* 5 */
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196 | AW_1, AW_E, AW_0, AW_0, /* 6 */
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197 | AW_0, AW_1, AW_0, AW_0, /* 7 */
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198 | AW_0, AW_0, AW_8, AW_0, /* 8 */
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199 | AW_0, AW_0, AW_4, AW_0, /* 9 */
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200 | AW_0, AW_0, AW_2, AW_0, /* 10 */
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201 | AW_0, AW_0, AW_1, AW_0, /* 11 */
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202 | AW_0, AW_0, AW_0, AW_9, /* 12 */
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203 | AW_0, AW_0, AW_0, AW_5, /* 13 */
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204 | AW_0, AW_0, AW_0, AW_3, /* 14 */
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205 | AW_0, AW_0, AW_0, AW_F /* 15 */
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206 | };
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207 |
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208 | /* |
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209 |
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210 | */
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211 |
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212 | static int16_t *arrows[] = { /* arrow pointer table */
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213 |
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214 | v_curs0, /* 0 - upper left, even pixel */
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215 | v_curs1, /* 1 - upper left, odd pixel */
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216 |
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217 | v_curs2, /* 2 - upper right, even pixel */
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218 | v_curs3, /* 3 - upper right, odd pixel */
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219 |
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220 | v_curs4, /* 4 - lower left, even pixel */
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221 | v_curs5, /* 5 - lower left, odd pixel */
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222 |
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223 | v_curs6, /* 6 - lower right, even pixel */
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224 | v_curs7 /* 7 - lower right, odd pixel */
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225 | };
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226 |
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227 | /* |
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228 |
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229 | */
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230 |
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231 | /*
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232 | =============================================================================
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233 | gcurpos(xloc, yloc) -- position the graphic cursor at ('xloc', 'yloc')
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234 |
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235 | Also sets stcrow and stccol to keep them in sync.
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236 | =============================================================================
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237 | */
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238 |
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239 | int16_t gcurpos(int16_t xloc, int16_t yloc)
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240 | {
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241 | register int16_t ab, xo, yo;
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242 | register struct octent *op;
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243 |
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244 | if (xloc LT XCTR) {
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245 |
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246 | xo = 0; /* arrow points left */
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247 |
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248 | if (yloc LT YCTR)
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249 | {ab = 0; yo = 0;} /* arrow points up */
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250 | else
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251 | {ab = 4; yo = -YOFF;} /* arrow points down */
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252 |
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253 | } else {
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254 |
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255 | xo = -XOFF; /* arrow points right */
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256 |
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257 | if (yloc LT YCTR)
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258 | {ab = 2; yo = 0;} /* arrow points up */
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259 | else
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260 | {ab = 6; yo = -YOFF;} /* arrow points down */
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261 | }
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262 |
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263 | if (v_regs[5] & 0x0180)
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264 | vbank(0);
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265 |
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266 | v_odtab[GCPRI][0] |= V_BLA;
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267 | objclr(GCPRI);
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268 |
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269 | op = &v_obtab[GCURS];
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270 | op->objx = xloc + xo;
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271 | op->objy = yloc + yo;
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272 | op->obase = arrows[ab + (xloc & 0x0001)];
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273 | op->odtw1 = 0x0400 | (0x03FF & (op->objx >> 1));
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274 |
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275 | SetPri(GCURS, GCPRI);
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276 |
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277 | stcrow = yloc / 14;
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278 | stccol = xloc >> 3;
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279 | return(ab + (xloc & 0x0001));
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280 | }
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281 |
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282 | /* |
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283 |
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284 | */
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285 |
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286 | /*
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287 | =============================================================================
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288 | andcopy() -- copy a pattern
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289 | =============================================================================
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290 | */
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291 |
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292 | void andcopy(uint16_t *to, uint16_t *from, uint16_t with, int16_t len)
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293 | {
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294 | register int16_t i;
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295 |
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296 | for (i = len; i--; )
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297 | *to++ = *from++ & with;
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298 | }
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299 |
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300 | /*
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301 | =============================================================================
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302 | arcurs() -- setup the arrow cursor
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303 | =============================================================================
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304 | */
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305 |
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306 | void arcurs(uint16_t icolor)
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307 | {
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308 | register int16_t color;
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309 |
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310 | color = exp_c(icolor);
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311 |
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312 | if ((v_regs[5] & 0x0180) NE 0x0100)
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313 | vbank(1);
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314 |
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315 | andcopy(v_curs0, ar_ule, color, 64); /* setup arrow cursor */
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316 | andcopy(v_curs1, ar_ulo, color, 64);
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317 | andcopy(v_curs2, ar_ure, color, 64);
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318 | andcopy(v_curs3, ar_uro, color, 64);
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319 | andcopy(v_curs4, ar_lle, color, 64);
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320 | andcopy(v_curs5, ar_llo, color, 64);
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321 | andcopy(v_curs6, ar_lre, color, 64);
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322 | andcopy(v_curs7, ar_lro, color, 64);
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323 | }
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324 |
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325 | /* |
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326 |
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327 | */
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328 |
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329 | /*
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330 | =============================================================================
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331 | sgcon() -- set graphic cursor object "on"
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332 | =============================================================================
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333 | */
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334 |
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335 | void sgcon(void)
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336 | {
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337 | if (sgcsw)
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338 | return;
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339 |
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340 | if (v_regs[5] & 0x0180)
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341 | vbank(0);
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342 |
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343 | v_odtab[GCPRI][0] &= ~V_BLA;
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344 | sgcsw = TRUE;
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345 | }
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346 |
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347 | /*
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348 | =============================================================================
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349 | sgcoff() -- set graphic cursor object "off"
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350 | =============================================================================
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351 | */
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352 |
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353 | void sgcoff(void)
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354 | {
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355 | if (!sgcsw)
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356 | return;
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357 |
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358 | if (v_regs[5] & 0x0180)
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359 | vbank(0);
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360 |
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361 | v_odtab[GCPRI][0] |= V_BLA;
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362 | sgcsw = FALSE;
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363 | }
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364 |
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