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ZealOS/docs/System/Boot/BootDVD.CC.html
TomAwezome 293db76ddb Update documentation.
2021-10-27 03:28:16 -04:00

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<a name="l1"></a><span class=cF0>#</span><span class=cF1>define</span><span class=cF0> </span><span class=cF3>BOOT_HIGH_LOC_DVD</span><span class=cF0> (</span><span class=cF7>(</span><span class=cF3>BOOT_RAM_LIMIT</span><span class=cF0> - (</span><span class=cF3>BOOT_STACK_SIZE</span><span class=cF0> + </span><span class=cF3>DVD_BOOT_LOADER_SIZE</span><span class=cF0>)</span><span class=cF7>)</span><span class=cF0> &gt;&gt; </span><span class=cFE>4</span><span class=cF0>)
<a name="l2"></a>
<a name="l3"></a></span><span class=cF5>DefinePrint</span><span class=cF0>(</span><span class=cF6>&quot;DD_BOOT_HIGH_LOC_DVD&quot;</span><span class=cF0>, </span><span class=cF6>&quot;%08X&quot;</span><span class=cF0>, </span><span class=cF3>BOOT_HIGH_LOC_DVD</span><span class=cF0> &lt;&lt; </span><span class=cFE>4</span><span class=cF0>);
<a name="l4"></a></span><span class=cF5>DefinePrint</span><span class=cF0>(</span><span class=cF6>&quot;DD_BOOT_HIGH_LOC_DVD_END&quot;</span><span class=cF0>, </span><span class=cF6>&quot;%08X&quot;</span><span class=cF0>, </span><span class=cF3>BOOT_RAM_LIMIT</span><span class=cF0> - </span><span class=cFE>1</span><span class=cF0>);
<a name="l5"></a>
<a name="l6"></a></span><span class=cF1>asm</span><span class=cF0> {
<a name="l7"></a></span><span class=cF1>USE16</span><span class=cF0>
<a name="l8"></a></span><span class=cFD>BDVD_START</span><span class=cF0>::
<a name="l9"></a></span><span class=cF2>//DL is supposed to have the BIOS drive number</span><span class=cF0>
<a name="l10"></a> </span><span class=cF1>CLD</span><span class=cF0>
<a name="l11"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>AX</span><span class=cF0>, </span><span class=cF3>BOOT_HIGH_LOC_DVD</span><span class=cF0>
<a name="l12"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>ES</span><span class=cF0>, </span><span class=cFC>AX</span><span class=cF0>
<a name="l13"></a>
<a name="l14"></a> </span><span class=cF1>CLI</span><span class=cF0>
<a name="l15"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>SS</span><span class=cF0>, </span><span class=cFC>AX</span><span class=cF0>
<a name="l16"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>SP</span><span class=cF0>, </span><span class=cF3>BOOT_STACK_SIZE</span><span class=cF0> + </span><span class=cF3>DVD_BOOT_LOADER_SIZE</span><span class=cF0>
<a name="l17"></a> </span><span class=cF1>STI</span><span class=cF0>
<a name="l18"></a>
<a name="l19"></a> </span><span class=cF1>CALL</span><span class=cF0> BDVD_GET_RIP
<a name="l20"></a>BDVD_GET_RIP:
<a name="l21"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>BX</span><span class=cF0>
<a name="l22"></a> </span><span class=cF1>SUB</span><span class=cF0> </span><span class=cFC>BX</span><span class=cF0>, BDVD_GET_RIP - </span><span class=cFD>BDVD_START</span><span class=cF0>
<a name="l23"></a> </span><span class=cF1>SHR</span><span class=cF0> </span><span class=cFC>BX</span><span class=cF0>, </span><span class=cFE>4</span><span class=cF0>
<a name="l24"></a></span><span class=cF2>//This copies this bootloader's code to 0x00096600</span><span class=cF0>
<a name="l25"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>AX</span><span class=cF0>, </span><span class=cFC>CS</span><span class=cF0>
<a name="l26"></a> </span><span class=cF1>ADD</span><span class=cF0> </span><span class=cFC>AX</span><span class=cF0>, </span><span class=cFC>BX</span><span class=cF0>
<a name="l27"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>DS</span><span class=cF0>, </span><span class=cFC>AX</span><span class=cF0>
<a name="l28"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>CX</span><span class=cF0>, </span><span class=cF3>DVD_BOOT_LOADER_SIZE</span><span class=cF0>
<a name="l29"></a> </span><span class=cF1>XOR</span><span class=cF0> </span><span class=cFC>SI</span><span class=cF0>, </span><span class=cFC>SI</span><span class=cF0>
<a name="l30"></a> </span><span class=cF1>XOR</span><span class=cF0> </span><span class=cFC>DI</span><span class=cF0>, </span><span class=cFC>DI</span><span class=cF0>
<a name="l31"></a> </span><span class=cF1>REP_MOVSB</span><span class=cF0>
<a name="l32"></a>
<a name="l33"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>AX</span><span class=cF0>, </span><span class=cF3>BOOT_HIGH_LOC_DVD</span><span class=cF0>
<a name="l34"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>DS</span><span class=cF0>, </span><span class=cFC>AX</span><span class=cF0>
<a name="l35"></a>
<a name="l36"></a></span><span class=cF2>//The assembler doesn't support 16-bit very well.</span><span class=cF0>
<a name="l37"></a> </span><span class=cF1>DU8</span><span class=cF0> </span><span class=cFE>0xEA</span><span class=cF0>; </span><span class=cF2>//JMP BOOT_HIGH_LOC_DVD:BDVD_MAIN</span><span class=cF0>
<a name="l38"></a> </span><span class=cF1>DU16</span><span class=cF0> </span><span class=cFD>BDVD_MAIN</span><span class=cF0> - </span><span class=cFD>BDVD_START</span><span class=cF0>, </span><span class=cF3>BOOT_HIGH_LOC_DVD</span><span class=cF0>;
<a name="l39"></a>
<a name="l40"></a>BDVD_BIOS_DRIVE_NUM: </span><span class=cF1>DU8</span><span class=cF0> </span><span class=cFE>0</span><span class=cF0>;
<a name="l41"></a>BDVD_PAGE: </span><span class=cF1>DU8</span><span class=cF0> </span><span class=cFE>0</span><span class=cF0>;
<a name="l42"></a>
<a name="l43"></a>BDVD_DAP: </span><span class=cF1>DU8</span><span class=cF0> </span><span class=cFE>16</span><span class=cF0>, </span><span class=cFE>0</span><span class=cF0>, </span><span class=cFE>1</span><span class=cF0>, </span><span class=cFE>0</span><span class=cF0>; </span><span class=cF2>//One block at a time</span><span class=cF0>
<a name="l44"></a>BDVD_DAP_BUF: </span><span class=cF1>DU16</span><span class=cF0> </span><span class=cFE>0</span><span class=cF0>, </span><span class=cFE>0</span><span class=cF0>;
<a name="l45"></a>BDVD_DAP_BLK: </span><span class=cF1>DU64</span><span class=cF0> </span><span class=cFE>0</span><span class=cF0>;
<a name="l46"></a>
<a name="l47"></a>BDVD_ZEALOS_MESSAGE: </span><span class=cF1>DU8</span><span class=cF0> </span><span class=cF6>&quot;Loading ZealOS&quot;</span><span class=cF0>, </span><span class=cFE>0</span><span class=cF0>;
<a name="l48"></a>
<a name="l49"></a>BDVD_NOT64_MESSAGE: </span><span class=cF1>DU8</span><span class=cF0> </span><span class=cF6>&quot;ZealOS requires a 64-bit capable processor.\n\r&quot;</span><span class=cF0>, </span><span class=cFE>0</span><span class=cF0>;
<a name="l50"></a>
<a name="l51"></a></span><span class=cF2>//These get patched.</span><span class=cF0>
<a name="l52"></a></span><span class=cFD>BDVD_BLK_LO</span><span class=cF0>:: </span><span class=cF1>DU16</span><span class=cF0> </span><span class=cFE>0</span><span class=cF0>;
<a name="l53"></a></span><span class=cFD>BDVD_BLK_HI</span><span class=cF0>:: </span><span class=cF1>DU16</span><span class=cF0> </span><span class=cFE>0</span><span class=cF0>;
<a name="l54"></a></span><span class=cFD>BDVD_BLK_COUNT</span><span class=cF0>:: </span><span class=cF1>DU16</span><span class=cF0> </span><span class=cFE>0</span><span class=cF0>;
<a name="l55"></a></span><span class=cFD>BDVD_SHIFT_BLKS</span><span class=cF0>:: </span><span class=cF1>DU16</span><span class=cF0> </span><span class=cFE>0</span><span class=cF0>;
<a name="l56"></a></span><span class=cFD>BDVD_PROGRESS_STEP</span><span class=cF0>:: </span><span class=cF1>DU32</span><span class=cF0> </span><span class=cFE>0</span><span class=cF0>;
<a name="l57"></a></span><span class=cFD>BDVD_PROGRESS_VAL</span><span class=cF0>:: </span><span class=cF1>DU32</span><span class=cF0> </span><span class=cFE>0</span><span class=cF0>;
<a name="l58"></a>
<a name="l59"></a></span><span class=cFD>BDVD_PUT_CHAR</span><span class=cF0>::
<a name="l60"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>AH</span><span class=cF0>, </span><span class=cFE>0xE</span><span class=cF0>
<a name="l61"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>BL</span><span class=cF0>, </span><span class=cFE>7</span><span class=cF0> </span><span class=cF2>//Might be foreground color on some BIOS's</span><span class=cF0>
<a name="l62"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>BH</span><span class=cF0>, </span><span class=cF1>U8</span><span class=cF0> [BDVD_PAGE - </span><span class=cFD>BDVD_START</span><span class=cF0>]
<a name="l63"></a> </span><span class=cF1>INT</span><span class=cF0> </span><span class=cFE>0x10</span><span class=cF0>
<a name="l64"></a></span><span class=cFD>BDVD_RET</span><span class=cF0>::
<a name="l65"></a> </span><span class=cF1>RET</span><span class=cF0>
<a name="l66"></a></span><span class=cFD>BDVD_PUTS</span><span class=cF0>::
<a name="l67"></a>@@1: </span><span class=cF1>LODSB</span><span class=cF0>
<a name="l68"></a> </span><span class=cF1>TEST</span><span class=cF0> </span><span class=cFC>AL</span><span class=cF0>, </span><span class=cFC>AL</span><span class=cF0>
<a name="l69"></a> </span><span class=cF1>JZ</span><span class=cF0> </span><span class=cFD>BDVD_RET</span><span class=cF0>
<a name="l70"></a> </span><span class=cF1>CALL</span><span class=cF0> </span><span class=cFD>BDVD_PUT_CHAR</span><span class=cF0>
<a name="l71"></a> </span><span class=cF1>JMP</span><span class=cF0> @@1
<a name="l72"></a>
<a name="l73"></a></span><span class=cFD>BDVD_MAIN</span><span class=cF0>::
<a name="l74"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cF1>U8</span><span class=cF0> [BDVD_BIOS_DRIVE_NUM - </span><span class=cFD>BDVD_START</span><span class=cF0>], </span><span class=cFC>DL</span><span class=cF0> </span><span class=cF2>//Passed in by BIOS</span><span class=cF0>
<a name="l75"></a>
<a name="l76"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>AH</span><span class=cF0>, </span><span class=cFE>0xF</span><span class=cF0>
<a name="l77"></a> </span><span class=cF1>INT</span><span class=cF0> </span><span class=cFE>0x10</span><span class=cF0>
<a name="l78"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cF1>U8</span><span class=cF0> [BDVD_PAGE - </span><span class=cFD>BDVD_START</span><span class=cF0>], </span><span class=cFC>BH</span><span class=cF0> </span><span class=cF2>//Video page</span><span class=cF0>
<a name="l79"></a>
<a name="l80"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>EAX</span><span class=cF0>, </span><span class=cFE>0x80000000</span><span class=cF0>
<a name="l81"></a> </span><span class=cF1>CPUID</span><span class=cF0>
<a name="l82"></a> </span><span class=cF1>CMP</span><span class=cF0> </span><span class=cFC>EAX</span><span class=cF0>, </span><span class=cFE>0x80000001</span><span class=cF0>
<a name="l83"></a> </span><span class=cF1>JB</span><span class=cF0> @@05
<a name="l84"></a>
<a name="l85"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>EAX</span><span class=cF0>, </span><span class=cFE>0x80000001</span><span class=cF0>
<a name="l86"></a> </span><span class=cF1>CPUID</span><span class=cF0>
<a name="l87"></a> </span><span class=cF1>BT</span><span class=cF0> </span><span class=cFC>EDX</span><span class=cF0>, </span><span class=cFE>29</span><span class=cF0>
<a name="l88"></a> </span><span class=cF1>JC</span><span class=cF0> @@15
<a name="l89"></a>@@05: </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>SI</span><span class=cF0>, BDVD_NOT64_MESSAGE - </span><span class=cFD>BDVD_START</span><span class=cF0>
<a name="l90"></a> </span><span class=cF1>CALL</span><span class=cF0> </span><span class=cFD>BDVD_PUTS</span><span class=cF0>
<a name="l91"></a>@@10: </span><span class=cF1>JMP</span><span class=cF0> @@10
<a name="l92"></a>
<a name="l93"></a>@@15: </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>SI</span><span class=cF0>, BDVD_ZEALOS_MESSAGE - </span><span class=cFD>BDVD_START</span><span class=cF0>
<a name="l94"></a> </span><span class=cF1>CALL</span><span class=cF0> </span><span class=cFD>BDVD_PUTS</span><span class=cF0>
<a name="l95"></a>
<a name="l96"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>AX</span><span class=cF0>, </span><span class=cF3>BOOT_RAM_BASE</span><span class=cF0> / </span><span class=cFE>16</span><span class=cF0>
<a name="l97"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>ES</span><span class=cF0>, </span><span class=cFC>AX</span><span class=cF0>
<a name="l98"></a> </span><span class=cF1>XOR</span><span class=cF0> </span><span class=cFC>ECX</span><span class=cF0>, </span><span class=cFC>ECX</span><span class=cF0>
<a name="l99"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>CX</span><span class=cF0>, </span><span class=cF9>U16</span><span class=cF0> [</span><span class=cFD>BDVD_BLK_COUNT</span><span class=cF0> - </span><span class=cFD>BDVD_START</span><span class=cF0>]
<a name="l100"></a>
<a name="l101"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>EAX</span><span class=cF0>, (</span><span class=cFE>80</span><span class=cF0> - </span><span class=cFE>7</span><span class=cF0> - </span><span class=cFE>9</span><span class=cF0>) * </span><span class=cFE>65536</span><span class=cF0> </span><span class=cF2>//80 columns</span><span class=cF0>
<a name="l102"></a> </span><span class=cF1>XOR</span><span class=cF0> </span><span class=cFC>EDX</span><span class=cF0>, </span><span class=cFC>EDX</span><span class=cF0>
<a name="l103"></a> </span><span class=cF1>DIV</span><span class=cF0> </span><span class=cFC>ECX</span><span class=cF0>
<a name="l104"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cF9>U32</span><span class=cF0> [</span><span class=cFD>BDVD_PROGRESS_STEP</span><span class=cF0> - </span><span class=cFD>BDVD_START</span><span class=cF0>], </span><span class=cFC>EAX</span><span class=cF0>
<a name="l105"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cF9>U32</span><span class=cF0> [</span><span class=cFD>BDVD_PROGRESS_VAL</span><span class=cF0> - </span><span class=cFD>BDVD_START</span><span class=cF0>], </span><span class=cFE>0</span><span class=cF0>
<a name="l106"></a>
<a name="l107"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>AX</span><span class=cF0>, </span><span class=cF9>U16</span><span class=cF0> [</span><span class=cFD>BDVD_BLK_LO</span><span class=cF0> - </span><span class=cFD>BDVD_START</span><span class=cF0>]
<a name="l108"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>DX</span><span class=cF0>, </span><span class=cF9>U16</span><span class=cF0> [</span><span class=cFD>BDVD_BLK_HI</span><span class=cF0> - </span><span class=cFD>BDVD_START</span><span class=cF0>]
<a name="l109"></a>
<a name="l110"></a>@@20: </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>CX</span><span class=cF0> </span><span class=cF2>//Block count</span><span class=cF0>
<a name="l111"></a>
<a name="l112"></a></span><span class=cF2>//READ BLOCK</span><span class=cF0>
<a name="l113"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>AX</span><span class=cF0> </span><span class=cF2>//Block lo</span><span class=cF0>
<a name="l114"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>DX</span><span class=cF0> </span><span class=cF2>//Block hi</span><span class=cF0>
<a name="l115"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>ES</span><span class=cF0> </span><span class=cF2>//Buf seg</span><span class=cF0>
<a name="l116"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cF9>U16</span><span class=cF0> [BDVD_DAP_BLK - </span><span class=cFD>BDVD_START</span><span class=cF0>], </span><span class=cFC>AX</span><span class=cF0>
<a name="l117"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cF9>U16</span><span class=cF0> [BDVD_DAP_BLK + </span><span class=cFE>2</span><span class=cF0> - </span><span class=cFD>BDVD_START</span><span class=cF0>], </span><span class=cFC>DX</span><span class=cF0>
<a name="l118"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>AX</span><span class=cF0>, </span><span class=cFC>ES</span><span class=cF0>
<a name="l119"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cF9>U16</span><span class=cF0> [BDVD_DAP_BUF + </span><span class=cFE>2</span><span class=cF0> - </span><span class=cFD>BDVD_START</span><span class=cF0>], </span><span class=cFC>AX</span><span class=cF0> </span><span class=cF2>//ES:0000</span><span class=cF0>
<a name="l120"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>SI</span><span class=cF0>, BDVD_DAP - </span><span class=cFD>BDVD_START</span><span class=cF0> </span><span class=cF2>//DS:SI=DAP</span><span class=cF0>
<a name="l121"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>AH</span><span class=cF0>, </span><span class=cFE>0x42</span><span class=cF0>
<a name="l122"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>DL</span><span class=cF0>, </span><span class=cF1>U8</span><span class=cF0> [BDVD_BIOS_DRIVE_NUM - </span><span class=cFD>BDVD_START</span><span class=cF0>]
<a name="l123"></a> </span><span class=cF1>INT</span><span class=cF0> </span><span class=cFE>0x13</span><span class=cF0>
<a name="l124"></a>
<a name="l125"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>AX</span><span class=cF0> </span><span class=cF2>//ES</span><span class=cF0>
<a name="l126"></a> </span><span class=cF1>ADD</span><span class=cF0> </span><span class=cFC>AX</span><span class=cF0>, </span><span class=cF3>DVD_BLK_SIZE</span><span class=cF0> / </span><span class=cFE>16</span><span class=cF0>
<a name="l127"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>ES</span><span class=cF0>, </span><span class=cFC>AX</span><span class=cF0>
<a name="l128"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>DX</span><span class=cF0>
<a name="l129"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>AX</span><span class=cF0>
<a name="l130"></a> </span><span class=cF1>INC</span><span class=cF0> </span><span class=cFC>AX</span><span class=cF0>
<a name="l131"></a> </span><span class=cF1>JNZ</span><span class=cF0> @@25
<a name="l132"></a> </span><span class=cF1>INC</span><span class=cF0> </span><span class=cFC>DX</span><span class=cF0>
<a name="l133"></a>
<a name="l134"></a>@@25: </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>AX</span><span class=cF0>
<a name="l135"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>BX</span><span class=cF0>, </span><span class=cF9>U16</span><span class=cF0> [</span><span class=cFD>BDVD_PROGRESS_VAL</span><span class=cF0> + </span><span class=cFE>2</span><span class=cF0> - </span><span class=cFD>BDVD_START</span><span class=cF0>]
<a name="l136"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>EAX</span><span class=cF0>, </span><span class=cF9>U32</span><span class=cF0> [</span><span class=cFD>BDVD_PROGRESS_STEP</span><span class=cF0> - </span><span class=cFD>BDVD_START</span><span class=cF0>]
<a name="l137"></a> </span><span class=cF1>ADD</span><span class=cF0> </span><span class=cF9>U32</span><span class=cF0> [</span><span class=cFD>BDVD_PROGRESS_VAL</span><span class=cF0> - </span><span class=cFD>BDVD_START</span><span class=cF0>], </span><span class=cFC>EAX</span><span class=cF0>
<a name="l138"></a> </span><span class=cF1>CMP</span><span class=cF0> </span><span class=cF9>U16</span><span class=cF0> [</span><span class=cFD>BDVD_PROGRESS_VAL</span><span class=cF0> + </span><span class=cFE>2</span><span class=cF0> - </span><span class=cFD>BDVD_START</span><span class=cF0>], </span><span class=cFC>BX</span><span class=cF0>
<a name="l139"></a> </span><span class=cF1>JE</span><span class=cF0> @@30
<a name="l140"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>AL</span><span class=cF0>, </span><span class=cF6>'.'</span><span class=cF0>
<a name="l141"></a> </span><span class=cF1>CALL</span><span class=cF0> </span><span class=cFD>BDVD_PUT_CHAR</span><span class=cF0>
<a name="l142"></a>@@30: </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>AX</span><span class=cF0>
<a name="l143"></a>
<a name="l144"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>CX</span><span class=cF0>
<a name="l145"></a> </span><span class=cF1>LOOP</span><span class=cF0> @@20
<a name="l146"></a>
<a name="l147"></a></span><span class=cF2>//Shift backward to align</span><span class=cF0>
<a name="l148"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>DS</span><span class=cF0>
<a name="l149"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>BX</span><span class=cF0>, </span><span class=cF9>U16</span><span class=cF0> [</span><span class=cFD>BDVD_SHIFT_BLKS</span><span class=cF0> - </span><span class=cFD>BDVD_START</span><span class=cF0>]
<a name="l150"></a> </span><span class=cF1>SHL</span><span class=cF0> </span><span class=cFC>BX</span><span class=cF0>, </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0> - </span><span class=cFE>4</span><span class=cF0>
<a name="l151"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>CX</span><span class=cF0>, </span><span class=cF9>U16</span><span class=cF0> [</span><span class=cFD>BDVD_BLK_COUNT</span><span class=cF0> - </span><span class=cFD>BDVD_START</span><span class=cF0>]
<a name="l152"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>AX</span><span class=cF0>, </span><span class=cF3>BOOT_RAM_BASE</span><span class=cF0> / </span><span class=cFE>16</span><span class=cF0>
<a name="l153"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>ES</span><span class=cF0>, </span><span class=cFC>AX</span><span class=cF0>
<a name="l154"></a> </span><span class=cF1>ADD</span><span class=cF0> </span><span class=cFC>AX</span><span class=cF0>, </span><span class=cFC>BX</span><span class=cF0>
<a name="l155"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>DS</span><span class=cF0>, </span><span class=cFC>AX</span><span class=cF0>
<a name="l156"></a>@@35: </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>CX</span><span class=cF0>
<a name="l157"></a> </span><span class=cF1>XOR</span><span class=cF0> </span><span class=cFC>SI</span><span class=cF0>, </span><span class=cFC>SI</span><span class=cF0>
<a name="l158"></a> </span><span class=cF1>XOR</span><span class=cF0> </span><span class=cFC>DI</span><span class=cF0>, </span><span class=cFC>DI</span><span class=cF0>
<a name="l159"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>CX</span><span class=cF0>, </span><span class=cF3>DVD_BLK_SIZE</span><span class=cF0> / </span><span class=cFE>4</span><span class=cF0>
<a name="l160"></a> </span><span class=cF1>REP_MOVSD</span><span class=cF0>
<a name="l161"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>AX</span><span class=cF0>, </span><span class=cFC>DS</span><span class=cF0>
<a name="l162"></a> </span><span class=cF1>ADD</span><span class=cF0> </span><span class=cFC>AX</span><span class=cF0>, </span><span class=cF3>DVD_BLK_SIZE</span><span class=cF0> / </span><span class=cFE>16</span><span class=cF0>
<a name="l163"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>DS</span><span class=cF0>, </span><span class=cFC>AX</span><span class=cF0>
<a name="l164"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>AX</span><span class=cF0>, </span><span class=cFC>ES</span><span class=cF0>
<a name="l165"></a> </span><span class=cF1>ADD</span><span class=cF0> </span><span class=cFC>AX</span><span class=cF0>, </span><span class=cF3>DVD_BLK_SIZE</span><span class=cF0> / </span><span class=cFE>16</span><span class=cF0>
<a name="l166"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>ES</span><span class=cF0>, </span><span class=cFC>AX</span><span class=cF0>
<a name="l167"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>CX</span><span class=cF0>
<a name="l168"></a> </span><span class=cF1>LOOP</span><span class=cF0> @@35
<a name="l169"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>DS</span><span class=cF0>
<a name="l170"></a>
<a name="l171"></a></span><span class=cF2>//See </span><a href="https://zeal-operating-system.github.io/ZealOS/Kernel/BlkDev/DiskAHCI.CC.html#l1131"><span class=cF4>AHCIBootDVDProbeAll</span></a><span class=cF2>().</span><span class=cF0>
<a name="l172"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>EBX</span><span class=cF0>, </span><span class=cF9>U32</span><span class=cF0> [</span><span class=cFD>BDVD_BLK_LO</span><span class=cF0> - </span><span class=cFD>BDVD_START</span><span class=cF0>]
<a name="l173"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>AX</span><span class=cF0>, </span><span class=cF9>U16</span><span class=cF0> [</span><span class=cFD>BDVD_SHIFT_BLKS</span><span class=cF0> - </span><span class=cFD>BDVD_START</span><span class=cF0>]
<a name="l174"></a> </span><span class=cF1>SHL</span><span class=cF0> </span><span class=cFC>EAX</span><span class=cF0>, </span><span class=cFE>16</span><span class=cF0>
<a name="l175"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>AX</span><span class=cF0>, </span><span class=cF3>BOOT_SRC_DVD</span><span class=cF0> </span><span class=cF2>//</span><span class=cF9><u>See sys_boot_src</span><span class=cF0>
<a name="l176"></a>
<a name="l177"></a></u></span><span class=cF2>//The assembler doesn't support 16-bit very well.</span><span class=cF0>
<a name="l178"></a> </span><span class=cF1>DU8</span><span class=cF0> </span><span class=cFE>0xEA</span><span class=cF0>; </span><span class=cF2>//JMP BOOT_RAM_BASE:0000</span><span class=cF0>
<a name="l179"></a> </span><span class=cF1>DU16</span><span class=cF0> </span><span class=cFE>0</span><span class=cF0>, </span><span class=cF3>BOOT_RAM_BASE</span><span class=cF0> / </span><span class=cFE>16</span><span class=cF0>;
<a name="l180"></a></span><span class=cF2>//Continues here </span><a href="https://zeal-operating-system.github.io/ZealOS/Kernel/KStart16.CC.html#l1"><span class=cF4>::/Kernel/KStart16.CC</span></a><span class=cF0>
<a name="l181"></a></span><span class=cFD>BDVD_END</span><span class=cF0>::
<a name="l182"></a>#</span><span class=cF1>assert</span><span class=cF0> </span><span class=cFD>BDVD_END</span><span class=cF0>-</span><span class=cFD>BDVD_START</span><span class=cF0> &lt; </span><span class=cF3>DVD_BOOT_LOADER_SIZE</span><span class=cF0>
<a name="l183"></a>}
</span></pre></body>
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