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annotate menu.s68 @ 790:e8b14d5a5b5a

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Add something resembling a proper header
author Michael Pavone <pavone@retrodev.com>
date Sat, 25 Jul 2015 02:54:00 -0700
parents 41e83b38bdc8
children 60686f8d5e48
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
789
41e83b38bdc8 Initial work on silly Genesis based menu
Michael Pavone <pavone@retrodev.com>
parents:
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1 dc.l $0, start
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2 dc.l empty_handler
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Michael Pavone <pavone@retrodev.com>
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3 dc.l empty_handler
41e83b38bdc8 Initial work on silly Genesis based menu
Michael Pavone <pavone@retrodev.com>
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4 ;$10
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Michael Pavone <pavone@retrodev.com>
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5 dc.l empty_handler
41e83b38bdc8 Initial work on silly Genesis based menu
Michael Pavone <pavone@retrodev.com>
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6 dc.l empty_handler
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Michael Pavone <pavone@retrodev.com>
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7 dc.l empty_handler
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Michael Pavone <pavone@retrodev.com>
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8 dc.l empty_handler
41e83b38bdc8 Initial work on silly Genesis based menu
Michael Pavone <pavone@retrodev.com>
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9 ;$20
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Michael Pavone <pavone@retrodev.com>
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10 dc.l empty_handler
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Michael Pavone <pavone@retrodev.com>
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11 dc.l empty_handler
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12 dc.l empty_handler
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Michael Pavone <pavone@retrodev.com>
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13 dc.l empty_handler
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Michael Pavone <pavone@retrodev.com>
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14 ;$30
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Michael Pavone <pavone@retrodev.com>
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15 dc.l empty_handler
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Michael Pavone <pavone@retrodev.com>
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16 dc.l empty_handler
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Michael Pavone <pavone@retrodev.com>
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17 dc.l empty_handler
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Michael Pavone <pavone@retrodev.com>
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18 dc.l empty_handler
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Michael Pavone <pavone@retrodev.com>
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19 ;$40
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Michael Pavone <pavone@retrodev.com>
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20 dc.l empty_handler
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21 dc.l empty_handler
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Michael Pavone <pavone@retrodev.com>
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22 dc.l empty_handler
41e83b38bdc8 Initial work on silly Genesis based menu
Michael Pavone <pavone@retrodev.com>
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23 dc.l empty_handler
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Michael Pavone <pavone@retrodev.com>
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24 ;$50
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Michael Pavone <pavone@retrodev.com>
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25 dc.l empty_handler
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Michael Pavone <pavone@retrodev.com>
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26 dc.l empty_handler
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27 dc.l empty_handler
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Michael Pavone <pavone@retrodev.com>
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28 dc.l empty_handler
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Michael Pavone <pavone@retrodev.com>
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29 ;$60
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30 dc.l empty_handler
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31 dc.l empty_handler
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32 dc.l empty_handler
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Michael Pavone <pavone@retrodev.com>
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33 dc.l empty_handler
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Michael Pavone <pavone@retrodev.com>
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34 ;$70
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Michael Pavone <pavone@retrodev.com>
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35 dc.l int_4
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36 dc.l empty_handler
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Michael Pavone <pavone@retrodev.com>
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37 dc.l int_6
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Michael Pavone <pavone@retrodev.com>
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38 dc.l empty_handler
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Michael Pavone <pavone@retrodev.com>
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39 ;$80
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Michael Pavone <pavone@retrodev.com>
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40 dc.l empty_handler
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41 dc.l empty_handler
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Michael Pavone <pavone@retrodev.com>
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42 dc.l empty_handler
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Michael Pavone <pavone@retrodev.com>
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43 dc.l empty_handler
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Michael Pavone <pavone@retrodev.com>
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44 ;$90
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Michael Pavone <pavone@retrodev.com>
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45 dc.l empty_handler
41e83b38bdc8 Initial work on silly Genesis based menu
Michael Pavone <pavone@retrodev.com>
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46 dc.l empty_handler
41e83b38bdc8 Initial work on silly Genesis based menu
Michael Pavone <pavone@retrodev.com>
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47 dc.l empty_handler
41e83b38bdc8 Initial work on silly Genesis based menu
Michael Pavone <pavone@retrodev.com>
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48 dc.l empty_handler
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Michael Pavone <pavone@retrodev.com>
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49 ;$A0
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50 dc.l empty_handler
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51 dc.l empty_handler
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Michael Pavone <pavone@retrodev.com>
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52 dc.l empty_handler
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Michael Pavone <pavone@retrodev.com>
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53 dc.l empty_handler
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Michael Pavone <pavone@retrodev.com>
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54 ;$B0
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Michael Pavone <pavone@retrodev.com>
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55 dc.l empty_handler
41e83b38bdc8 Initial work on silly Genesis based menu
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56 dc.l empty_handler
41e83b38bdc8 Initial work on silly Genesis based menu
Michael Pavone <pavone@retrodev.com>
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57 dc.l empty_handler
41e83b38bdc8 Initial work on silly Genesis based menu
Michael Pavone <pavone@retrodev.com>
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58 dc.l empty_handler
41e83b38bdc8 Initial work on silly Genesis based menu
Michael Pavone <pavone@retrodev.com>
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59 ;$C0
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60 dc.l empty_handler
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61 dc.l empty_handler
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62 dc.l empty_handler
41e83b38bdc8 Initial work on silly Genesis based menu
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63 dc.l empty_handler
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Michael Pavone <pavone@retrodev.com>
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64 ;$D0
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65 dc.l empty_handler
41e83b38bdc8 Initial work on silly Genesis based menu
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66 dc.l empty_handler
41e83b38bdc8 Initial work on silly Genesis based menu
Michael Pavone <pavone@retrodev.com>
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67 dc.l empty_handler
41e83b38bdc8 Initial work on silly Genesis based menu
Michael Pavone <pavone@retrodev.com>
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68 dc.l empty_handler
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Michael Pavone <pavone@retrodev.com>
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69 ;$E0
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70 dc.l empty_handler
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71 dc.l empty_handler
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72 dc.l empty_handler
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73 dc.l empty_handler
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Michael Pavone <pavone@retrodev.com>
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74 ;$F0
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75 dc.l empty_handler
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76 dc.l empty_handler
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77 dc.l empty_handler
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78 dc.l empty_handler
790
e8b14d5a5b5a Add something resembling a proper header
Michael Pavone <pavone@retrodev.com>
parents: 789
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79 dc.b "SEGA GENESIS "
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Michael Pavone <pavone@retrodev.com>
parents: 789
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80 dc.b "(c) 2015.JULY "
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parents: 789
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81 dc.b "Menu "
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82 dc.b " "
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parents: 789
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83 dc.b " "
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84 dc.b "Menu "
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parents: 789
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85 dc.b " "
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86 dc.b " "
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parents: 789
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87 dc.b "GM MK-00000-00", 0, 0
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parents: 789
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88 dc.b " "
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89 dc.l $0, rom_end-1, $FF0000, $FFFFFF
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90 dc.b " "
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91 dc.b " "
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92 dc.b " "
e8b14d5a5b5a Add something resembling a proper header
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93 dc.b " "
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94 dc.b "JUE "
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95
789
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96 empty_handler:
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97 int_6:
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Michael Pavone <pavone@retrodev.com>
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98 rte
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Michael Pavone <pavone@retrodev.com>
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99 int_4:
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100 rte
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101
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Michael Pavone <pavone@retrodev.com>
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102 rsset $FFFF8000
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Michael Pavone <pavone@retrodev.com>
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103 x_pos rs.w 1
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Michael Pavone <pavone@retrodev.com>
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104 base_cmd rs.l 1
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105
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Michael Pavone <pavone@retrodev.com>
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106 start:
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Michael Pavone <pavone@retrodev.com>
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107 lea $C00000, a0
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Michael Pavone <pavone@retrodev.com>
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108 lea $C00004, a1
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Michael Pavone <pavone@retrodev.com>
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109 move.w #$8104, (a1) ;Mode 5, everything turned off
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Michael Pavone <pavone@retrodev.com>
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110 move.w #$8004, (a1)
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Michael Pavone <pavone@retrodev.com>
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111 move.w #$8220, (a1) ;Scroll a table $8000
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Michael Pavone <pavone@retrodev.com>
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112 move.w #$8405, (a1) ;Scroll b table $A000
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Michael Pavone <pavone@retrodev.com>
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113 move.w #$8560, (a1) ;SAT table $C000
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Michael Pavone <pavone@retrodev.com>
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114 move.w #$8700, (a1) ;backdrop color 0
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Michael Pavone <pavone@retrodev.com>
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115 move.w #$8B00, (a1) ;full screen scroll
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Michael Pavone <pavone@retrodev.com>
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116 move.w #$8C87, (a1) ;40 cell mode, double-res interlace
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117 move.w #$8D00, (a1) ;hscroll table at 0
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Michael Pavone <pavone@retrodev.com>
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118 move.w #$8F02, (a1) ;autoinc 2
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Michael Pavone <pavone@retrodev.com>
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119 move.w #$9001, (a1) ;64x32 scroll size
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Michael Pavone <pavone@retrodev.com>
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120 move.l #$C0000000, (a1)
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Michael Pavone <pavone@retrodev.com>
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121 move.w #$000, (a0)
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Michael Pavone <pavone@retrodev.com>
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122 move.w #$EEE, (a0)
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123
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Michael Pavone <pavone@retrodev.com>
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124 ;init scroll table
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Michael Pavone <pavone@retrodev.com>
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125 move.l #$40000000, (a1)
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Michael Pavone <pavone@retrodev.com>
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126 move.w #0, (a0)
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Michael Pavone <pavone@retrodev.com>
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127 move.w #4, (a0)
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128
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Michael Pavone <pavone@retrodev.com>
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129 ;load tiles
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Michael Pavone <pavone@retrodev.com>
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130 move.l #$48000000, (a1)
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Michael Pavone <pavone@retrodev.com>
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131 lea font(pc), a2
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132 move.w #((fontend-font)/4 - 1), d0
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Michael Pavone <pavone@retrodev.com>
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133 tloop:
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Michael Pavone <pavone@retrodev.com>
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134 move.l (a2)+, (a0)
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Michael Pavone <pavone@retrodev.com>
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135 dbra d0, tloop
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Michael Pavone <pavone@retrodev.com>
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136
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Michael Pavone <pavone@retrodev.com>
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137
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Michael Pavone <pavone@retrodev.com>
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138
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Michael Pavone <pavone@retrodev.com>
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139 ;clear name table
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Michael Pavone <pavone@retrodev.com>
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140 move.l #$40000002, (a1)
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Michael Pavone <pavone@retrodev.com>
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141 moveq #32, d0
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Michael Pavone <pavone@retrodev.com>
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142 move.w #(64*64-1), d1
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Michael Pavone <pavone@retrodev.com>
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143 ploop:
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Michael Pavone <pavone@retrodev.com>
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144 move.w d0, (a0)
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Michael Pavone <pavone@retrodev.com>
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145 dbra d1, ploop
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Michael Pavone <pavone@retrodev.com>
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146
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Michael Pavone <pavone@retrodev.com>
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147 move.l #$40000002, d3,
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Michael Pavone <pavone@retrodev.com>
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148 move.l d3, (a1)
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Michael Pavone <pavone@retrodev.com>
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149 move.l d3, base_cmd.w
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150
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Michael Pavone <pavone@retrodev.com>
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151 lea Message(pc), a6
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Michael Pavone <pavone@retrodev.com>
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152 moveq #0, d0
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153 bsr print_string
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Michael Pavone <pavone@retrodev.com>
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154
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155
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156
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Michael Pavone <pavone@retrodev.com>
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157 move.w #$8144, (a1) ;enable display
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158 move #$2300, sr
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159
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160
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Michael Pavone <pavone@retrodev.com>
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161 wait_forever
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162 bra wait_forever
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163
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164 Message:
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165 dc.b "Journey From Darkness - Strider Returns (U) [c][!].bin", $A
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166 dc.b "Toejam & Earl in Panic on Funkotron (U) [!].bin", $A
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167 dc.b "Fire Shark (U) [c][!].bin", $A
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Michael Pavone <pavone@retrodev.com>
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168 dc.b "Sonic and Knuckles (W) [!].bin", 0
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169
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Michael Pavone <pavone@retrodev.com>
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170 align 1
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171
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Michael Pavone <pavone@retrodev.com>
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172 ;Prints a null terminated string
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173 ;a6 - pointer to string
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Michael Pavone <pavone@retrodev.com>
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174 ;a0 - VDP data port
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175 ;d0 - base tile attribute
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176 ;
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177 ;Clobbers: d1.w, d2.w, d3.l
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178 print_string:
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179 lea widths(pc), a5
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180 move.w x_pos.w, d2
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181 move.l base_cmd.w, d3
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182 .loop
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183 moveq #0, d1
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184 move.b (a6)+, d1
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185 beq .end
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186 cmp.b #$A, d1
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187 beq .newline
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188 tst.b (-32, a5, d1.w)
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Michael Pavone <pavone@retrodev.com>
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189 beq .narrow
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Michael Pavone <pavone@retrodev.com>
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190 add.w d0, d1
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Michael Pavone <pavone@retrodev.com>
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191 move.w d1, (a0)
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Michael Pavone <pavone@retrodev.com>
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192 addq #2, d2
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193 bra .loop
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194 .narrow
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Michael Pavone <pavone@retrodev.com>
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195 add.w d0, d1
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Michael Pavone <pavone@retrodev.com>
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196 move.w d1, (a0)
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Michael Pavone <pavone@retrodev.com>
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197 addq #1, d2
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Michael Pavone <pavone@retrodev.com>
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198 move.l d2, d1
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199 ;add.w d1, d1
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Michael Pavone <pavone@retrodev.com>
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200 and.w #$FFFE, d1
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Michael Pavone <pavone@retrodev.com>
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201 swap d1
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Michael Pavone <pavone@retrodev.com>
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202 eor.l #$20000000, d3
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Michael Pavone <pavone@retrodev.com>
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203 or.l d3, d1
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Michael Pavone <pavone@retrodev.com>
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204 move.l d1, (a1)
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Michael Pavone <pavone@retrodev.com>
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205 bra .loop
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Michael Pavone <pavone@retrodev.com>
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206 .newline
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Michael Pavone <pavone@retrodev.com>
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207 moveq #0, d2
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Michael Pavone <pavone@retrodev.com>
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208 and.l #$DFFFFFFF, d3
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Michael Pavone <pavone@retrodev.com>
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209 add.l #$00800000, d3
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Michael Pavone <pavone@retrodev.com>
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210 move.l d3, (a1)
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Michael Pavone <pavone@retrodev.com>
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211 bra .loop
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212 .end
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Michael Pavone <pavone@retrodev.com>
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213 move.w d2, x_pos.w
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Michael Pavone <pavone@retrodev.com>
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214 move.l d3, base_cmd.w
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Michael Pavone <pavone@retrodev.com>
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215 rts
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Michael Pavone <pavone@retrodev.com>
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216
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Michael Pavone <pavone@retrodev.com>
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217 align 1
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Michael Pavone <pavone@retrodev.com>
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218 font:
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Michael Pavone <pavone@retrodev.com>
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219 incbin font_interlace_variable.tiles
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Michael Pavone <pavone@retrodev.com>
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220 fontend
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Michael Pavone <pavone@retrodev.com>
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221
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Michael Pavone <pavone@retrodev.com>
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222 widths:
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Michael Pavone <pavone@retrodev.com>
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223 dc.b 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 1, 1, 0, 1
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224 dc.b 1, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0
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225 dc.b 0, 1, 0, 0, 1, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1
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226 dc.b 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1
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227 dc.b 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1
790
e8b14d5a5b5a Add something resembling a proper header
Michael Pavone <pavone@retrodev.com>
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228
e8b14d5a5b5a Add something resembling a proper header
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229 rom_end: