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 <span id="projectnumber">2.0</span>
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<div class="title">video.c</div> </div>
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<a href="video_8c.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/*-</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Copyright (c) 2002-2018 The UbixOS Project.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * All rights reserved.</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * This was developed by Christopher W. Olsen for the UbixOS Project.</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * Redistribution and use in source and binary forms, with or without modification, are permitted</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * provided that the following conditions are met:</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * 1) Redistributions of source code must retain the above copyright notice, this list of</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * conditions, the following disclaimer and the list of authors.</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * 2) Redistributions in binary form must reproduce the above copyright notice, this list of</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * conditions, the following disclaimer and the list of authors in the documentation and/or</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * other materials provided with the distribution.</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * 3) Neither the name of the UbixOS Project nor the names of its contributors may be used to</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * endorse or promote products derived from this software without specific prior written</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * permission.</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  </div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#include <<a class="code" href="io_8h.html">sys/io.h</a>></span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#include <<a class="code" href="video_8h.html">sys/video.h</a>></span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#include <<a class="code" href="spinlock_8h.html">ubixos/spinlock.h</a>></span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#include <<a class="code" href="tty_8h.html">ubixos/tty.h</a>></span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  </div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="keyword">static</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *videoBuffer = (<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *) 0xB8000;</div>
<div class="line"><a name="l00035"></a><span class="lineno"><a class="line" href="video_8c.html#aa6d08b2dd961295607e6a5d52f1d471e"> 35</a></span> <span class="keywordtype">int</span> <a class="code" href="video_8c.html#aa6d08b2dd961295607e6a5d52f1d471e">printColor</a> = <a class="code" href="video_8h.html#a2984c3db0ad3a4a571a8ee0b4d2fe90b">defaultColor</a>;</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  </div>
<div class="line"><a name="l00037"></a><span class="lineno"><a class="line" href="video_8c.html#a05d079fd6b2d61320ad423e5c918903c"> 37</a></span> <span class="keywordtype">void</span> <a class="code" href="video_8c.html#a05d079fd6b2d61320ad423e5c918903c">backSpace</a>() {</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <a class="code" href="objgfx30_8h.html#ada085051a6d9a8e00a2cb256d1af14ba">uInt32</a> bufferOffset = 0x0;</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <a class="code" href="io_8h.html#a8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(0x3d4, 0x0e);</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  bufferOffset = <a class="code" href="io_8h.html#a77b934268de1b3ecdcf3f275413b3108">inportByte</a>(0x3d5);</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  bufferOffset <<= 0x8; <span class="comment">/* Shift Address Left 8 Bits */</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <a class="code" href="io_8h.html#a8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(0x3d4, 0x0f);</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  bufferOffset += <a class="code" href="io_8h.html#a77b934268de1b3ecdcf3f275413b3108">inportByte</a>(0x3d5);</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  bufferOffset <<= 0x1; <span class="comment">/* Shift Address Left 1 Bits */</span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  videoBuffer[bufferOffset--] = 0x20;</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  videoBuffer[bufferOffset--] = <a class="code" href="video_8c.html#aa6d08b2dd961295607e6a5d52f1d471e">printColor</a>;</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  videoBuffer[bufferOffset] = 0x20;</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  bufferOffset >>= 0x1;</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <a class="code" href="tty_8h.html#aafbb5679104334c34d7691b2de7d7a86">tty_foreground</a>-><a class="code" href="structtty__termNode.html#a22e444939c17fda952c5924c8780aa8b">tty_x</a> = (bufferOffset & 0xFF);</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <a class="code" href="tty_8h.html#aafbb5679104334c34d7691b2de7d7a86">tty_foreground</a>-><a class="code" href="structtty__termNode.html#a9440a0dd6d9f9402e84725a303946bb9">tty_y</a> = (bufferOffset >> 0x8);</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <a class="code" href="io_8h.html#a8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(0x3D4, 0x0f);</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <a class="code" href="io_8h.html#a8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(0x3D5, <a class="code" href="tty_8h.html#aafbb5679104334c34d7691b2de7d7a86">tty_foreground</a>-><a class="code" href="structtty__termNode.html#a22e444939c17fda952c5924c8780aa8b">tty_x</a>);</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <a class="code" href="io_8h.html#a8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(0x3D4, 0x0e);</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <a class="code" href="io_8h.html#a8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(0x3D5, <a class="code" href="tty_8h.html#aafbb5679104334c34d7691b2de7d7a86">tty_foreground</a>-><a class="code" href="structtty__termNode.html#a9440a0dd6d9f9402e84725a303946bb9">tty_y</a>);</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> }</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  </div>
<div class="line"><a name="l00058"></a><span class="lineno"><a class="line" href="video_8c.html#a5429378b96a24fadfd2d1f8d777eb95a"> 58</a></span> <span class="keywordtype">void</span> <a class="code" href="video_8c.html#a5429378b96a24fadfd2d1f8d777eb95a">kprint</a>(<span class="keywordtype">char</span> *<span class="keywordtype">string</span>) {</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  </div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> bufferOffset = 0x0, character = 0x0, i = 0x0;</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  </div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="comment">/* Short circuit if we're in tty mode */</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keywordflow">if</span> (<a class="code" href="fat__string_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a> != <a class="code" href="tty_8h.html#aafbb5679104334c34d7691b2de7d7a86">tty_foreground</a>) {</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <a class="code" href="tty_8h.html#ad96f57a7c113d3cfa76ee5fed6de33c0">tty_print</a>(<span class="keywordtype">string</span>, <a class="code" href="tty_8h.html#a4f96ccac7e60296ef496008d8cbed0ff">tty_find</a>(0));</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  }</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  </div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="comment">/* We Need To Get The Y Position */</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <a class="code" href="io_8h.html#a8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(0x3D4, 0x0e);</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  bufferOffset = <a class="code" href="io_8h.html#a77b934268de1b3ecdcf3f275413b3108">inportByte</a>(0x3D5);</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  bufferOffset <<= 8; <span class="comment">/* Shift Address Left 8 Bits */</span></div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="comment">/* Then We Need To Add The X Position */</span></div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <a class="code" href="io_8h.html#a8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(0x3D4, 0x0f);</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  bufferOffset += <a class="code" href="io_8h.html#a77b934268de1b3ecdcf3f275413b3108">inportByte</a>(0x3D5);</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  bufferOffset <<= 1; <span class="comment">/* Shift Address Left 1 Bits */</span></div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  </div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keywordflow">while</span> ((character = *<span class="keywordtype">string</span>++)) {</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keywordflow">switch</span> (character) {</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keywordflow">case</span> <span class="charliteral">'\n'</span>:</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  bufferOffset = (bufferOffset / 160) * 160 + 160;</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordflow">default</span>:</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  videoBuffer[bufferOffset++] = character;</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  videoBuffer[bufferOffset++] = <a class="code" href="video_8c.html#aa6d08b2dd961295607e6a5d52f1d471e">printColor</a>;</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  } <span class="comment">/* switch */</span></div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="comment">/* Check To See If We Are Out Of Bounds */</span></div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keywordflow">if</span> (bufferOffset >= 160 * 25) {</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keywordflow">for</span> (i = 0; i < 160 * 24; i++) {</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  videoBuffer[i] = videoBuffer[i + 160];</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  } <span class="comment">/* for */</span></div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordflow">for</span> (i = 0; i < 80; i++) {</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  videoBuffer[(160 * 24) + (i * 2)] = 0x20;</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  videoBuffer[(160 * 24) + (i * 2) + 1] = <a class="code" href="video_8c.html#aa6d08b2dd961295607e6a5d52f1d471e">printColor</a>;</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  } <span class="comment">/* for */</span></div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  bufferOffset -= 160;</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  } <span class="comment">/* if */</span></div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  } <span class="comment">/* while */</span></div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  bufferOffset >>= 1; <span class="comment">/* Set the new cursor position */</span></div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <a class="code" href="io_8h.html#a8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(0x3D4, 0x0f);</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <a class="code" href="io_8h.html#a8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(0x3D5, ((bufferOffset & 0x0ff) & 0xFF));</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <a class="code" href="io_8h.html#a8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(0x3D4, 0x0e);</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <a class="code" href="io_8h.html#a8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(0x3D5, ((bufferOffset >> 8) & 0xFF));</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  </div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> }</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  </div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="comment">/* Clears The Screen */</span></div>
<div class="line"><a name="l00109"></a><span class="lineno"><a class="line" href="video_8c.html#a9d7e8af417b6d543da691e9c0e2f6f9f"> 109</a></span> <span class="keywordtype">void</span> <a class="code" href="video_8c.html#a9d7e8af417b6d543da691e9c0e2f6f9f">clearScreen</a>() {</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keywordtype">short</span> i = 0x0;</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  </div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keywordflow">for</span> (i = 0x0; i < (80 * 25); i++) {</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  videoBuffer[i * 2] = 0x20;</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  videoBuffer[i * 2 + 1] = <a class="code" href="video_8h.html#a2984c3db0ad3a4a571a8ee0b4d2fe90b">defaultColor</a>;</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  }</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <a class="code" href="io_8h.html#a8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(0x3D4, 0x0f);</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <a class="code" href="io_8h.html#a8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(0x3D5, 0);</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <a class="code" href="io_8h.html#a8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(0x3D4, 0x0e);</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <a class="code" href="io_8h.html#a8acc1a06073db2e7b92ffbd00fbd0cf1">outportByte</a>(0x3D5, 0);</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> }</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  </div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span> <span class="comment">/***</span></div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="comment"> END</span></div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="comment"> ***/</span></div>
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<div class="ttc" id="aio_8h_html_a77b934268de1b3ecdcf3f275413b3108"><div class="ttname"><a href="io_8h.html#a77b934268de1b3ecdcf3f275413b3108">inportByte</a></div><div class="ttdeci">unsigned char inportByte(unsigned int)</div><div class="ttdoc">input one byte from specified port</div><div class="ttdef"><b>Definition:</b> <a href="io_8c_source.html#l00038">io.c:38</a></div></div>
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