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annotate src/video/ataricommon/SDL_ataric2p.S @ 734:0310bb01091f

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New C2P conversion routine
author Patrice Mandin <patmandin@gmail.com>
date Wed, 12 Nov 2003 18:45:48 +0000
parents f6ffac90895c
children 93207759e065
rev   line source
281
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 /*
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29 Chunky to planar conversion routine
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30 1 byte/pixel -> 4 or 8 bit planes
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31
734
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32 Patrice Mandin
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33 Xavier Joubert
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34 Mikael Kalms
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35 */
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36
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37 .globl _SDL_Atari_C2pConvert
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38 .globl _SDL_Atari_C2pConvert8
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39 .globl _SDL_Atari_C2pConvert4
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40 .globl _SDL_Atari_C2pConvert4_pal
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41 .globl _SDL_Atari_table_c2p
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42
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43 /* ------------ Conversion C2P, 8 bits ------------ */
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44
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45 .text
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46 _SDL_Atari_C2pConvert8:
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47 movel sp@(4),c2p_source
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48 movel sp@(8),c2p_dest
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49 movel sp@(12),c2p_width
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50 movel sp@(16),c2p_height
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51 movel sp@(20),c2p_dblligne
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52 movel sp@(24),c2p_srcpitch
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53 movel sp@(28),c2p_dstpitch
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54
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55 moveml d2-d7/a2-a6,sp@-
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56
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57 movel c2p_source,c2p_cursrc
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58 movel c2p_dest,c2p_curdst
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59 movel #0x0f0f0f0f,d4
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60 movel #0x00ff00ff,d5
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61 movel #0x55555555,d6
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62 movew c2p_height+2,c2p_row
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63 movew c2p_width+2,d0
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64 andw #-8,d0
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65 movew d0,c2p_rowlen
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66
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67 SDL_Atari_C2p8_rowloop:
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68
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69 movel c2p_cursrc,a0
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70 movel c2p_curdst,a1
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71
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72 movel a0,a2
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73 addw c2p_rowlen,a2
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74
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75 movel a0@+,d0
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76 movel a0@+,d1
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77 movel a0@+,d2
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78 movel a0@+,d3
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79 /*
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80 d0 = a7a6a5a4a3a2a1a0 b7b6b5b4b3b2b1b0 c7c6c5c4c3c2c1c0 d7d6d5d4d3d2d1d0
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81 d1 = e7e6e5e4e3e2e1e0 f7f6f5f4f3f2f1f0 g7g6g5g4g3g2g1g0 h7h6h5h4h3h2h1h0
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82 d2 = i7i6i5i4i3i2i1i0 j7j6j5j4j3j2j1j0 k7k6k5k4k3k2k1k0 l7l6l5l4l3l2l1l0
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83 d3 = m7m6m5m4m3m2m1m0 n7n6n5n4n3n2n1n0 o7o6o5o4o3o2o1o0 p7p6p5p4p3p2p1p0
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84 */
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85 movel d1,d7
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86 lsrl #4,d7
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87 eorl d0,d7
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88 andl d4,d7
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89 eorl d7,d0
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90 lsll #4,d7
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91 eorl d7,d1
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92
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93 movel d3,d7
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94 lsrl #4,d7
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95 eorl d2,d7
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96 andl d4,d7
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97 eorl d7,d2
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98 lsll #4,d7
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99 eorl d7,d3
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100
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101 movel d2,d7
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102 lsrl #8,d7
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103 eorl d0,d7
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104 andl d5,d7
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105 eorl d7,d0
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106 lsll #8,d7
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107 eorl d7,d2
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108
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109 movel d3,d7
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110 lsrl #8,d7
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111 eorl d1,d7
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112 andl d5,d7
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113 eorl d7,d1
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114 lsll #8,d7
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115 eorl d7,d3
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116 /*
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117 d0 = a7a6a5a4e7e6e5e4 i7i6i5i4m7m6m5m4 c7c6c5c4g7g6g5g4 k7k6k5k4o7o6o5o4
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118 d1 = a3a2a1a0e3e2e1e0 i3i2i1i0m3m2m1m0 c3c2c1c0g3g2g1g0 k3k2k1k0o3o2o1o0
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119 d2 = b7b6b5b4f7f6f5f4 j7j6j5j4n7n6n5n4 d7d6d5d4h7h6h5h4 l7l6l5l4p7p6p5p4
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120 d3 = b3b2b1b0f3f2f1f0 j3j2j1j0n3n2n1n0 d3d2d1d0h3h2h1h0 l3l2l1l0p3p2p1p0
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121 */
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122 bras SDL_Atari_C2p8_start
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123
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124 SDL_Atari_C2p8_pix16:
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125
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126 movel a0@+,d0
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127 movel a0@+,d1
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128 movel a0@+,d2
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129 movel a0@+,d3
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130 /*
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131 d0 = a7a6a5a4a3a2a1a0 b7b6b5b4b3b2b1b0 c7c6c5c4c3c2c1c0 d7d6d5d4d3d2d1d0
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132 d1 = e7e6e5e4e3e2e1e0 f7f6f5f4f3f2f1f0 g7g6g5g4g3g2g1g0 h7h6h5h4h3h2h1h0
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133 d2 = i7i6i5i4i3i2i1i0 j7j6j5j4j3j2j1j0 k7k6k5k4k3k2k1k0 l7l6l5l4l3l2l1l0
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134 d3 = m7m6m5m4m3m2m1m0 n7n6n5n4n3n2n1n0 o7o6o5o4o3o2o1o0 p7p6p5p4p3p2p1p0
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135 */
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136 movel d1,d7
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137 lsrl #4,d7
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138 movel a3,a1@+
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139 eorl d0,d7
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140 andl d4,d7
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141 eorl d7,d0
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142 lsll #4,d7
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143 eorl d7,d1
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144
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
145 movel d3,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
146 lsrl #4,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
147 eorl d2,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
148 andl d4,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
149 eorl d7,d2
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
150 movel a4,a1@+
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
151 lsll #4,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
152 eorl d7,d3
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
153
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
154 movel d2,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
155 lsrl #8,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
156 eorl d0,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
157 andl d5,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
158 eorl d7,d0
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
159 movel a5,a1@+
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
160 lsll #8,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
161 eorl d7,d2
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
162
734
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
163 movel d3,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
164 lsrl #8,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
165 eorl d1,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
166 andl d5,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
167 eorl d7,d1
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
168 movel a6,a1@+
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
169 lsll #8,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
170 eorl d7,d3
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
171 /*
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
172 d0 = a7a6a5a4e7e6e5e4 i7i6i5i4m7m6m5m4 c7c6c5c4g7g6g5g4 k7k6k5k4o7o6o5o4
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
173 d1 = a3a2a1a0e3e2e1e0 i3i2i1i0m3m2m1m0 c3c2c1c0g3g2g1g0 k3k2k1k0o3o2o1o0
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
174 d2 = b7b6b5b4f7f6f5f4 j7j6j5j4n7n6n5n4 d7d6d5d4h7h6h5h4 l7l6l5l4p7p6p5p4
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
175 d3 = b3b2b1b0f3f2f1f0 j3j2j1j0n3n2n1n0 d3d2d1d0h3h2h1h0 l3l2l1l0p3p2p1p0
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
176 */
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
177
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
178 SDL_Atari_C2p8_start:
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
179
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
180 movel d2,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
181 lsrl #1,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
182 eorl d0,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
183 andl d6,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
184 eorl d7,d0
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
185 addl d7,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
186 eorl d7,d2
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
187
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
188 movel d3,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
189 lsrl #1,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
190 eorl d1,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
191 andl d6,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
192 eorl d7,d1
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
193 addl d7,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
194 eorl d7,d3
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
195 /*
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
196 d0 = a7b7a5b5e7f7e5f5 i7j7i5j5m7n7m5n5 c7d7c5d5g7h7g5h5 k7l7k5l5o7p7o5p5
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
197 d1 = a3b3a1b1e3f3e1f1 i3j3i1j1m3n3m1n1 c3d3c1d1g3h3g1h1 k3l3k1l1o3p3o1p1
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
198 d2 = a6b6a4b4e6f6e4f4 i6j6i4j4m6n6m4n4 c6d6c4d4g6h6g4h4 k6l6k4l4o6p6o4p4
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
199 d3 = a2b2a0b0e2f2e0f0 i2j2i0j0m2n2m0n0 c2d2c0d0g2h2g0h0 k2l2k0l0o2p2o0p0
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
200 */
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
201 movew d2,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
202 movew d0,d2
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
203 swap d2
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
204 movew d2,d0
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
205 movew d7,d2
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
206
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
207 movew d3,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
208 movew d1,d3
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
209 swap d3
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
210 movew d3,d1
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
211 movew d7,d3
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
212 /*
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
213 d0 = a7b7a5b5e7f7e5f5 i7j7i5j5m7n7m5n5 a6b6a4b4e6f6e4f4 i6j6i4j4m6n6m4n4
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
214 d1 = a3b3a1b1e3f3e1f1 i3j3i1j1m3n3m1n1 a2b2a0b0e2f2e0f0 i2j2i0j0m2n2m0n0
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
215 d2 = c7d7c5d5g7h7g5h5 k7l7k5l5o7p7o5p5 c6d6c4d4g6h6g4h4 k6l6k4l4o6p6o4p4
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
216 d3 = c3d3c1d1g3h3g1h1 k3l3k1l1o3p3o1p1 c2d2c0d0g2h2g0h0 k2l2k0l0o2p2o0p0
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
217 */
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
218 movel d2,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
219 lsrl #2,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
220 eorl d0,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
221 andl #0x33333333,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
222 eorl d7,d0
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
223 lsll #2,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
224 eorl d7,d2
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
225
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
226 movel d3,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
227 lsrl #2,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
228 eorl d1,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
229 andl #0x33333333,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
230 eorl d7,d1
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
231 lsll #2,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
232 eorl d7,d3
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
233 /*
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
234 d0 = a7b7c7d7e7f7g7h7 i7j7k7l7m7n7o7p7 a6b6c6d6e6f6g6h6 i6j6k6l6m6n6o6p6
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
235 d1 = a3b3c3d3e3f3g3h3 i3j3k3l3m3n3o3p3 a2b2c2d2e2f2g2h2 i2j2k2l2m2n2o2p2
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
236 d2 = a5b5c5d5e5f5g5h5 i5j5k5l5m5n5o5p5 a4b4c4d4e4f4g4h4 i4j4k4l4m4n4o4p4
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
237 d3 = a1b1c1d1e1f1g1h1 i1j1k1l1m1n1o1p1 a0b0c0d0e0f0g0h0 i0j0k0l0m0n0o0p0
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
238 */
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
239 swap d0
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
240 swap d1
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
241 swap d2
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
242 swap d3
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
243
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
244 movel d0,a6
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
245 movel d2,a5
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
246 movel d1,a4
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
247 movel d3,a3
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
248
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
249 cmpl a0,a2
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
250 bgt SDL_Atari_C2p8_pix16
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
251
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
252 movel a3,a1@+
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
253 movel a4,a1@+
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
254 movel a5,a1@+
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
255 movel a6,a1@+
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
256
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
257 /* Double the line ? */
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
258
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
259 movel c2p_srcpitch,d0
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
260 movel c2p_dstpitch,d1
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
261
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
262 tstl c2p_dblligne
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
263 beqs SDL_Atari_C2p8_nodblline
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
264
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
265 movel c2p_curdst,a0
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
266 movel a0,a1
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
267 addl d1,a1
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
268
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
269 movew c2p_width+2,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
270 lsrw #4,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
271 subql #1,d7
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
272 SDL_Atari_C2p8_dblloop:
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
273 movel a0@+,a1@+
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
274 movel a0@+,a1@+
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
275 movel a0@+,a1@+
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
276 movel a0@+,a1@+
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
277 dbra d7,SDL_Atari_C2p8_dblloop
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
278
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
279 addl d1,c2p_curdst
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
280
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
281 SDL_Atari_C2p8_nodblline:
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
282
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
283 /* Next line */
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
284
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
285 addl d0,c2p_cursrc
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
286 addl d1,c2p_curdst
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
287
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
288 subqw #1,c2p_row
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
289 bne SDL_Atari_C2p8_rowloop
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
290
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
291 moveml sp@+,d2-d7/a2-a6
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
292 rts
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
293
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
294 /* ------------ Conversion C2P, 4 bits ------------ */
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
295
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
296 _SDL_Atari_C2pConvert4:
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
297 movel sp@(4),c2p_source
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
298 movel sp@(8),c2p_dest
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
299 movel sp@(12),c2p_width
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
300 movel sp@(16),c2p_height
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
301 movel sp@(20),c2p_dblligne
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
302 movel sp@(24),c2p_srcpitch
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
303 movel sp@(28),c2p_dstpitch
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
304
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
305 moveml d2-d7/a2-a6,sp@-
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
306
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
307 movel c2p_source,a0
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
308 movel c2p_dest,a1
734
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
309 lea _SDL_Atari_table_c2p,a2
281
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
310 movel #0x00070001,d3
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
311 #if defined(__M68020__)
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
312 moveq #0,d0
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
313 #endif
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
314
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
315 movel c2p_height,d7
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
316 subql #1,d7
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
317 c2p4_bcly:
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
318 movel a0,a4 | Save start address of source
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
319 movel a1,a5 | Save start address of dest
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
320
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
321 | Conversion
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
322
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
323 movel c2p_width,d6
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
324 lsrw #4,d6
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
325 subql #1,d6
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
326 c2p4_bclx:
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
327 | Octets 0-7
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
328
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
329 moveq #0,d1
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
330 moveq #7,d5
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
331 c2p4_bcl07:
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
332 #if defined(__M68020__)
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
333 moveb a0@+,d0
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
334 lea a2@(0,d0:w:4),a3
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
335 #else
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
336 moveq #0,d0
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
337 moveb a0@+,d0
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
338 lslw #2,d0
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
339 lea a2@(0,d0:w),a3
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
340 #endif
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
341 lsll #1,d1
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
342 orl a3@,d1
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
343 dbra d5,c2p4_bcl07
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
344
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
345 movepl d1,a1@(0)
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
346 addw d3,a1
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
347 swap d3
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
348
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
349 | Octets 8-15
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
350
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
351 moveq #0,d1
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
352 moveq #7,d5
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
353 c2p4_bcl815:
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
354 #if defined(__M68020__)
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
355 moveb a0@+,d0
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
356 lea a2@(0,d0:w:4),a3
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
357 #else
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
358 moveq #0,d0
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
359 moveb a0@+,d0
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
360 lslw #2,d0
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
361 lea a2@(0,d0:w),a3
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
362 #endif
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
363 lsll #1,d1
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
364 orl a3@,d1
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
365 dbra d5,c2p4_bcl815
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
366
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
367 movepl d1,a1@(0)
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
368 addw d3,a1
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
369 swap d3
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
370
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
371 dbra d6,c2p4_bclx
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
372
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
373 | Double line ?
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
374
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
375 tstl c2p_dblligne
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
376 beq c2p4_nodblligne
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
377
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
378 movel a5,a6 | src line
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
379 movel a5,a1 | dest line
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
380 addl c2p_dstpitch,a1
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
381
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
382 movel c2p_width,d6
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
383 lsrw #3,d6
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
384 subql #1,d6
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
385 c2p4_copydbl:
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
386 movel a6@+,a1@+
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
387 dbra d6,c2p4_copydbl
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
388
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
389 addl c2p_dstpitch,a5
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
390 c2p4_nodblligne:
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
391
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
392 | Next line
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
393
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
394 movel a4,a0
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
395 addl c2p_srcpitch,a0
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
396 movel a5,a1
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
397 addl c2p_dstpitch,a1
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
398
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
399 dbra d7,c2p4_bcly
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
400
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
401 moveml sp@+,d2-d7/a2-a6
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
402 rts
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
403
734
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
404 /* ------------ Conversion of a light palette in 4 bits ------------ */
281
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
405
734
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
406 _SDL_Atari_C2pConvert4_pal:
281
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Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
407 /* a0 is a 256-word light palette */
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
408 movel sp@(4),a0
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
409
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
410 moveml d2-d3,sp@-
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
411
734
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
412 lea _SDL_Atari_table_c2p,a1
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
413 movew #255,d3
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
414 c2p_pal_initbcl:
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
415 movew a0@+,d0
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
416 lsrw #4,d0
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
417 and #15,d0
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
418
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
419 moveq #3,d1
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
420 c2p_pal_initbyte:
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
421 btst d1,d0
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
422 sne d2
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
423 negw d2
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
424 moveb d2,a1@(0,d1:w)
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
425
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
426 dbra d1,c2p_pal_initbyte
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
427
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
428 addql #4,a1
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
429 dbra d3,c2p_pal_initbcl
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
430
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
431 moveml sp@+,d2-d3
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
432
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
433 rts
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
434
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
435 /* ------------ Buffers ------------ */
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
436
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
437 .data
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
438
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
439 .even
734
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
440 .comm _SDL_Atari_C2pConvert,4
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
diff changeset
441 .comm _SDL_Atari_table_c2p,2048
281
c5010ab8ba35 Added initial support for Atari (thanks Patrice!)
Sam Lantinga <slouken@libsdl.org>
parents:
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442
734
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
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443 .comm c2p_source,4 /* Source framebuffer */
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
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444 .comm c2p_dest,4 /* Destination framebuffer */
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
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445 .comm c2p_width,4 /* Width of zone to convert */
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
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446 .comm c2p_height,4 /* Height of zone to convert */
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
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447 .comm c2p_dblligne,4 /* Double the lines while converting ? */
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
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448 .comm c2p_srcpitch,4 /* Source pitch */
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
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449 .comm c2p_dstpitch,4 /* Destination pitch */
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
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450 .comm c2p_cursrc,4 /* Current source line */
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
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451 .comm c2p_curdst,4 /* Current destination line */
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
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452 .comm c2p_rowlen,2 /* Line length in bytes */
0310bb01091f New C2P conversion routine
Patrice Mandin <patmandin@gmail.com>
parents: 297
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453 .comm c2p_row,2 /* Current line number */