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ZealOS/docs/System/Boot/BootMHD2.CC.html
TomAwezome 6b3fd2fecb Rename abs_addres to abs_address. 
Update documentation/comments to rename addr, fun, var, stmt, blk, desc, reg, seg, ptr, dup, clus, val, and bttn, to address, function, variable, statement, block, description, register, segment, pointer, duplicate, cluster, value, and button, respectively.
2021-10-06 21:35:32 -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>MODULE_SIZE</span><span class=cF0> </span><span class=cFE>2</span><span class=cF0> * </span><span class=cF3>BLK_SIZE</span><span class=cF0>
<a name="l2"></a>#</span><span class=cF1>define</span><span class=cF0> </span><span class=cF3>BOOT_HIGH_LOC_MHD2</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>MODULE_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="l3"></a>
<a name="l4"></a></span><span class=cF5>DefinePrint</span><span class=cF0>(</span><span class=cF6>&quot;DD_BOOT_HIGH_LOC_MHD2&quot;</span><span class=cF0>, </span><span class=cF6>&quot;%08X&quot;</span><span class=cF0>, </span><span class=cF3>BOOT_HIGH_LOC_MHD2</span><span class=cF0> &lt;&lt; </span><span class=cFE>4</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>BMHD2_START</span><span class=cF0>::
<a name="l9"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cF9>U32</span><span class=cF0> </span><span class=cFC>FS</span><span class=cF0>:[</span><span class=cFE>0</span><span class=cF0>], </span><span class=cF6>'B'</span><span class=cF0> + </span><span class=cFE>0x2000</span><span class=cF0> + (</span><span class=cF6>'2'</span><span class=cF0> + </span><span class=cFE>0x2000</span><span class=cF0>) &lt;&lt; </span><span class=cFE>16</span><span class=cF0>
<a name="l10"></a>
<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_MHD2</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></span><span class=cF2>//This copies this bootloader's code to 0x00096A00</span><span class=cF0>
<a name="l14"></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="l15"></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="l16"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cF9>U32</span><span class=cF0> [BMHD2_OLD_CS_RIP - </span><span class=cFD>BMHD2_START</span><span class=cF0>], </span><span class=cFC>EBX</span><span class=cF0>
<a name="l17"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cF1>U8</span><span class=cF0> [BMHD2_BIOS_DRIVE_NUM - </span><span class=cFD>BMHD2_START</span><span class=cF0>], </span><span class=cFC>DL</span><span class=cF0>
<a name="l18"></a>
<a name="l19"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>CX</span><span class=cF0>, </span><span class=cF3>MODULE_SIZE</span><span class=cF0>
<a name="l20"></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="l21"></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="l22"></a> </span><span class=cF1>REP_MOVSB</span><span class=cF0>
<a name="l23"></a>
<a name="l24"></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_MHD2</span><span class=cF0>
<a name="l25"></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="l26"></a>
<a name="l27"></a></span><span class=cF2>//The assembler doesn't support 16-bit very well.</span><span class=cF0>
<a name="l28"></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_MHD2:BMHD2_HISTART</span><span class=cF0>
<a name="l29"></a> </span><span class=cF1>DU16</span><span class=cF0> BMHD2_HISTART - </span><span class=cFD>BMHD2_START</span><span class=cF0>, </span><span class=cF3>BOOT_HIGH_LOC_MHD2</span><span class=cF0>;
<a name="l30"></a>
<a name="l31"></a></span><span class=cFD>BMHD2_BOOT_MESSAGE</span><span class=cF0>::
<a name="l32"></a> </span><span class=cF1>DU8</span><span class=cF0> </span><span class=cFE>256</span><span class=cF0> </span><span class=cF1>DUP</span><span class=cF0>(</span><span class=cFE>0</span><span class=cF0>);
<a name="l33"></a>
<a name="l34"></a>BMHD2_BIOS_DRIVE_NUM: </span><span class=cF1>DU8</span><span class=cF0> </span><span class=cFE>0</span><span class=cF0>;
<a name="l35"></a>BMHD2_PAGE: </span><span class=cF1>DU8</span><span class=cF0> </span><span class=cFE>0</span><span class=cF0>;
<a name="l36"></a></span><span class=cFD>BMHD2_BLK_ARRAY</span><span class=cF0>:: </span><span class=cF1>DU64</span><span class=cF0> </span><span class=cFE>8</span><span class=cF0> </span><span class=cF1>DUP</span><span class=cF0>(</span><span class=cFE>0</span><span class=cF0>);
<a name="l37"></a>
<a name="l38"></a>BMHD2_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="l39"></a>BMHD2_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="l40"></a></span><span class=cFD>BMHD2_DAP_BLK</span><span class=cF0>:: </span><span class=cF2>//64-bit</span><span class=cF0>
<a name="l41"></a>BMHD2_DAP_BLK_LO: </span><span class=cF1>DU32</span><span class=cF0> </span><span class=cFE>0</span><span class=cF0>;
<a name="l42"></a>BMHD2_DAP_BLK_HI: </span><span class=cF1>DU32</span><span class=cF0> </span><span class=cFE>0</span><span class=cF0>;
<a name="l43"></a>
<a name="l44"></a></span><span class=cFD>BMHD2_PUT_CHAR</span><span class=cF0>::
<a name="l45"></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="l46"></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="l47"></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> [BMHD2_PAGE - </span><span class=cFD>BMHD2_START</span><span class=cF0>]
<a name="l48"></a> </span><span class=cF1>INT</span><span class=cF0> </span><span class=cFE>0x10</span><span class=cF0>
<a name="l49"></a></span><span class=cFD>BMHD2_RET</span><span class=cF0>::
<a name="l50"></a> </span><span class=cF1>RET</span><span class=cF0>
<a name="l51"></a></span><span class=cFD>BMHD2_PUTS</span><span class=cF0>::
<a name="l52"></a>@@1: </span><span class=cF1>LODSB</span><span class=cF0>
<a name="l53"></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="l54"></a> </span><span class=cF1>JZ</span><span class=cF0> </span><span class=cFD>BMHD2_RET</span><span class=cF0>
<a name="l55"></a> </span><span class=cF1>CALL</span><span class=cF0> </span><span class=cFD>BMHD2_PUT_CHAR</span><span class=cF0>
<a name="l56"></a> </span><span class=cF1>JMP</span><span class=cF0> @@1
<a name="l57"></a>
<a name="l58"></a>BMHD2_GETCHAR:
<a name="l59"></a> </span><span class=cF1>XOR</span><span class=cF0> </span><span class=cFC>AH</span><span class=cF0>, </span><span class=cFC>AH</span><span class=cF0>
<a name="l60"></a> </span><span class=cF1>INT</span><span class=cF0> </span><span class=cFE>0x16</span><span class=cF0>
<a name="l61"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>AX</span><span class=cF0>
<a name="l62"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>AH</span><span class=cF0>, </span><span class=cFE>0x0E</span><span class=cF0>
<a name="l63"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>BX</span><span class=cF0>, </span><span class=cFE>0x07</span><span class=cF0>
<a name="l64"></a> </span><span class=cF1>INT</span><span class=cF0> </span><span class=cFE>0x10</span><span class=cF0>
<a name="l65"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>AX</span><span class=cF0>
<a name="l66"></a> </span><span class=cF1>RET</span><span class=cF0>
<a name="l67"></a>
<a name="l68"></a>BMHD2_HISTART:
<a name="l69"></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="l70"></a> </span><span class=cF1>INT</span><span class=cF0> </span><span class=cFE>0x10</span><span class=cF0>
<a name="l71"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cF1>U8</span><span class=cF0> [BMHD2_PAGE - </span><span class=cFD>BMHD2_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="l72"></a>
<a name="l73"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cF9>U32</span><span class=cF0> </span><span class=cFC>FS</span><span class=cF0>:[</span><span class=cFE>0</span><span class=cF0>], </span><span class=cFE>0</span><span class=cF0>
<a name="l74"></a>@@5: </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>SI</span><span class=cF0>, </span><span class=cFD>BMHD2_BOOT_MESSAGE</span><span class=cF0> - </span><span class=cFD>BMHD2_START</span><span class=cF0>
<a name="l75"></a> </span><span class=cF1>CALL</span><span class=cF0> </span><span class=cFD>BMHD2_PUTS</span><span class=cF0>
<a name="l76"></a> </span><span class=cF1>CALL</span><span class=cF0> BMHD2_GETCHAR
<a name="l77"></a> </span><span class=cF1>CMP</span><span class=cF0> </span><span class=cFC>AL</span><span class=cF0>, </span><span class=cF6>'0'</span><span class=cF0>
<a name="l78"></a> </span><span class=cF1>JB</span><span class=cF0> @@5
<a name="l79"></a> </span><span class=cF1>CMP</span><span class=cF0> </span><span class=cFC>AL</span><span class=cF0>, </span><span class=cF6>'8'</span><span class=cF0>
<a name="l80"></a> </span><span class=cF1>JAE</span><span class=cF0> @@5
<a name="l81"></a> </span><span class=cF1>AND</span><span class=cF0> </span><span class=cFC>EAX</span><span class=cF0>, </span><span class=cFE>7</span><span class=cF0>
<a name="l82"></a>
<a name="l83"></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>BMHD2_BLK_ARRAY</span><span class=cF0> - </span><span class=cFD>BMHD2_START</span><span class=cF0>[</span><span class=cFC>EAX</span><span class=cF0> * </span><span class=cFE>8</span><span class=cF0>]
<a name="l84"></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>BMHD2_BLK_ARRAY</span><span class=cF0> + </span><span class=cFE>4</span><span class=cF0> - </span><span class=cFD>BMHD2_START</span><span class=cF0>[</span><span class=cFC>EAX</span><span class=cF0> * </span><span class=cFE>8</span><span class=cF0>]
<a name="l85"></a>
<a name="l86"></a> </span><span class=cF1>TEST</span><span class=cF0> </span><span class=cFC>EBX</span><span class=cF0>, </span><span class=cFC>EBX</span><span class=cF0>
<a name="l87"></a> </span><span class=cF1>JNZ</span><span class=cF0> @@10
<a name="l88"></a> </span><span class=cF1>TEST</span><span class=cF0> </span><span class=cFC>EAX</span><span class=cF0>, </span><span class=cFC>EAX</span><span class=cF0>
<a name="l89"></a> </span><span class=cF1>JZ</span><span class=cF0> @@5
<a name="l90"></a>
<a name="l91"></a>@@10: </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cF9>U32</span><span class=cF0> [BMHD2_DAP_BLK_LO - </span><span class=cFD>BMHD2_START</span><span class=cF0>], </span><span class=cFC>EBX</span><span class=cF0>
<a name="l92"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cF9>U32</span><span class=cF0> [BMHD2_DAP_BLK_HI - </span><span class=cFD>BMHD2_START</span><span class=cF0>], </span><span class=cFC>EAX</span><span class=cF0>
<a name="l93"></a>
<a name="l94"></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> [BMHD2_OLD_CS_RIP - </span><span class=cFD>BMHD2_START</span><span class=cF0>]
<a name="l95"></a> </span><span class=cF1>SHR</span><span class=cF0> </span><span class=cFC>AX</span><span class=cF0>, </span><span class=cFE>4</span><span class=cF0>
<a name="l96"></a> </span><span class=cF1>ADD</span><span class=cF0> </span><span class=cFC>AX</span><span class=cF0>, </span><span class=cF9>U16</span><span class=cF0> [BMHD2_OLD_CS_RIP + </span><span class=cFE>2</span><span class=cF0> - </span><span class=cFD>BMHD2_START</span><span class=cF0>]
<a name="l97"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cF9>U16</span><span class=cF0> [BMHD2_DAP_BUF + </span><span class=cFE>2</span><span class=cF0> - </span><span class=cFD>BMHD2_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="l98"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>SI</span><span class=cF0>, BMHD2_DAP - </span><span class=cFD>BMHD2_START</span><span class=cF0> </span><span class=cF2>//DS:SI=DAP</span><span class=cF0>
<a name="l99"></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> [BMHD2_BIOS_DRIVE_NUM - </span><span class=cFD>BMHD2_START</span><span class=cF0>]
<a name="l100"></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="l101"></a> </span><span class=cF1>INT</span><span class=cF0> </span><span class=cFE>0x13</span><span class=cF0>
<a name="l102"></a>
<a name="l103"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>EBP</span><span class=cF0>
<a name="l104"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>EDX</span><span class=cF0>
<a name="l105"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>EBX</span><span class=cF0>
<a name="l106"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>ECX</span><span class=cF0>
<a name="l107"></a> </span><span class=cF1>XOR</span><span class=cF0> </span><span class=cFC>EAX</span><span class=cF0>, </span><span class=cFC>EAX</span><span class=cF0>
<a name="l108"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>GS</span><span class=cF0>
<a name="l109"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>FS</span><span class=cF0>
<a name="l110"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>ES</span><span class=cF0>
<a name="l111"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>DS</span><span class=cF0>
<a name="l112"></a> </span><span class=cF1>POPF</span><span class=cF0>
<a name="l113"></a>
<a name="l114"></a></span><span class=cF2>//The assembler doesn't support 16-bit very well.</span><span class=cF0>
<a name="l115"></a> </span><span class=cF1>DU8</span><span class=cF0> </span><span class=cFE>0xEA</span><span class=cF0>; </span><span class=cF2>//JMP xxxx:yyyy</span><span class=cF0>
<a name="l116"></a>BMHD2_OLD_CS_RIP:
<a name="l117"></a> </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="l118"></a></span><span class=cFD>BMHD2_END</span><span class=cF0>::
<a name="l119"></a></span><span class=cF2>//Continues here </span><a href="https://zeal-operating-system.github.io/ZealOS/System/Boot/BootHD.CC.html#l10"><span class=cF4>::/System/Boot/BootHD.CC</span></a><span class=cF0>
<a name="l120"></a>#</span><span class=cF1>assert</span><span class=cF0> </span><span class=cFD>BMHD2_END</span><span class=cF0> - </span><span class=cFD>BMHD2_START</span><span class=cF0> &lt; </span><span class=cF3>MODULE_SIZE</span><span class=cF0>
<a name="l121"></a>}
</span></pre></body>
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