Reimar/templeos-info
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
41e4bd55c9
templeos-info/public/Wb/Adam/Opt/Boot/BootDVD.HC.HTML

220 lines
27 KiB
Plaintext
Raw Normal View History

Use HTML for Holyc files as well
2024-03-24 21:24:44 +00:00
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="generator" content="TempleOS V5.03">
<meta name="viewport" content="width=device-width">
<link rel="stylesheet" href="/style/templeos.css">
<script src="/script/templeos.js"></script>
<style type="text/css">
.cF0{color:#000000;background-color:#ffffff;}
.cF1{color:#0000aa;background-color:#ffffff;}
.cF2{color:#00aa00;background-color:#ffffff;}
.cF3{color:#00aaaa;background-color:#ffffff;}
.cF4{color:#aa0000;background-color:#ffffff;}
.cF5{color:#aa00aa;background-color:#ffffff;}
.cF6{color:#aa5500;background-color:#ffffff;}
.cF7{color:#aaaaaa;background-color:#ffffff;}
.cF8{color:#555555;background-color:#ffffff;}
.cF9{color:#5555ff;background-color:#ffffff;}
.cFA{color:#55ff55;background-color:#ffffff;}
.cFB{color:#55ffff;background-color:#ffffff;}
.cFC{color:#ff5555;background-color:#ffffff;}
.cFD{color:#ff55ff;background-color:#ffffff;}
.cFE{color:#ffff55;background-color:#ffffff;}
.cFF{color:#ffffff;background-color:#ffffff;}
</style>
</head>
<body>
<pre id="content">
<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>-\
<a name="l2"></a> (</span><span class=cF3>BOOT_STK_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;4)
<a name="l3"></a>
<a name="l4"></a></span><span class=cF5>DefinePrint</span><span class=cF0>(
<a name="l5"></a> </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;4);
<a name="l6"></a></span><span class=cF5>DefinePrint</span><span class=cF0>(
<a name="l7"></a> </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>-1);
<a name="l8"></a>
<a name="l9"></a></span><span class=cF1>asm</span><span class=cF0> {
<a name="l10"></a></span><span class=cF1>USE16</span><span class=cF0>
<a name="l11"></a></span><span class=cFD>BDVD_START</span><span class=cF0>::
<a name="l12"></a></span><span class=cF2>//DL is supposed to have the BIOS drive number</span><span class=cF0>
<a name="l13"></a> </span><span class=cF1>CLD</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=cF3>BOOT_HIGH_LOC_DVD</span><span class=cF0>
<a name="l15"></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="l16"></a>
<a name="l17"></a> </span><span class=cF1>CLI</span><span class=cF0>
<a name="l18"></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="l19"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>SP</span><span class=cF0>,</span><span class=cF3>BOOT_STK_SIZE</span><span class=cF0>+</span><span class=cF3>DVD_BOOT_LOADER_SIZE</span><span class=cF0>
<a name="l20"></a> </span><span class=cF1>STI</span><span class=cF0>
<a name="l21"></a>
<a name="l22"></a> </span><span class=cF1>CALL</span><span class=cF0> BDVD_GET_RIP
<a name="l23"></a>BDVD_GET_RIP:
<a name="l24"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>BX</span><span class=cF0>
<a name="l25"></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="l26"></a> </span><span class=cF1>SHR</span><span class=cF0> </span><span class=cFC>BX</span><span class=cF0>,4
<a name="l27"></a></span><span class=cF2>//This copies this bootloader's code to 0x00096600</span><span class=cF0>
<a name="l28"></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="l29"></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="l30"></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="l31"></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="l32"></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="l33"></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="l34"></a> </span><span class=cF1>REP_MOVSB</span><span class=cF0>
<a name="l35"></a>
<a name="l36"></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="l37"></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="l38"></a>
<a name="l39"></a></span><span class=cF2>//My assembler doesn't support 16-bit very well.</span><span class=cF0>
<a name="l40"></a> </span><span class=cF1>DU8</span><span class=cF0> 0xEA; </span><span class=cF2>//JMP BOOT_HIGH_LOC_DVD:BDVD_MAIN</span><span class=cF0>
<a name="l41"></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="l42"></a>
<a name="l43"></a>BDVD_BIOS_DRV_NUM: </span><span class=cF1>DU8</span><span class=cF0> 0;
<a name="l44"></a>BDVD_PAGE: </span><span class=cF1>DU8</span><span class=cF0> 0;
<a name="l45"></a>
<a name="l46"></a>BDVD_DAP: </span><span class=cF1>DU8</span><span class=cF0> 16,0,1,0; </span><span class=cF2>//One blk at a time</span><span class=cF0>
<a name="l47"></a>BDVD_DAP_BUF: </span><span class=cF1>DU16</span><span class=cF0> 0,0;
<a name="l48"></a>BDVD_DAP_BLK: </span><span class=cF1>DU64</span><span class=cF0> 0;
<a name="l49"></a>
<a name="l50"></a>BDVD_TEMPLEOS_MSG:
<a name="l51"></a> </span><span class=cF1>DU8</span><span class=cF0> </span><span class=cF6>&quot;Loading TempleOS&quot;</span><span class=cF0>,0;
<a name="l52"></a>
<a name="l53"></a>BDVD_NOT64_MSG:
<a name="l54"></a> </span><span class=cF1>DU8</span><span class=cF0> </span><span class=cF6>&quot;TempleOS requires a 64-bit capable processor.\n\r&quot;</span><span class=cF0>,0;
<a name="l55"></a>
<a name="l56"></a></span><span class=cF2>//These get patched.</span><span class=cF0>
<a name="l57"></a></span><span class=cFD>BDVD_BLK_LO</span><span class=cF0>:: </span><span class=cF1>DU16</span><span class=cF0> 0;
<a name="l58"></a></span><span class=cFD>BDVD_BLK_HI</span><span class=cF0>:: </span><span class=cF1>DU16</span><span class=cF0> 0;
<a name="l59"></a></span><span class=cFD>BDVD_BLK_CNT</span><span class=cF0>:: </span><span class=cF1>DU16</span><span class=cF0> 0;
<a name="l60"></a></span><span class=cFD>BDVD_SHIFT_BLKS</span><span class=cF0>:: </span><span class=cF1>DU16</span><span class=cF0> 0;
<a name="l61"></a></span><span class=cFD>BDVD_PROGRESS_STEP</span><span class=cF0>:: </span><span class=cF1>DU32</span><span class=cF0> 0;
<a name="l62"></a></span><span class=cFD>BDVD_PROGRESS_VAL</span><span class=cF0>:: </span><span class=cF1>DU32</span><span class=cF0> 0;
<a name="l63"></a>
<a name="l64"></a></span><span class=cFD>BDVD_PUT_CHAR</span><span class=cF0>::
<a name="l65"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>AH</span><span class=cF0>,0xE
<a name="l66"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>BL</span><span class=cF0>,7 </span><span class=cF2>//Might be foreground color on some BIOS's</span><span class=cF0>
<a name="l67"></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="l68"></a> </span><span class=cF1>INT</span><span class=cF0> 0x10
<a name="l69"></a></span><span class=cFD>BDVD_RET</span><span class=cF0>::
<a name="l70"></a> </span><span class=cF1>RET</span><span class=cF0>
<a name="l71"></a></span><span class=cFD>BDVD_PUTS</span><span class=cF0>::
<a name="l72"></a>@@1: </span><span class=cF1>LODSB</span><span class=cF0>
<a name="l73"></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="l74"></a> </span><span class=cF1>JZ</span><span class=cF0> </span><span class=cFD>BDVD_RET</span><span class=cF0>
<a name="l75"></a> </span><span class=cF1>CALL</span><span class=cF0> </span><span class=cFD>BDVD_PUT_CHAR</span><span class=cF0>
<a name="l76"></a> </span><span class=cF1>JMP</span><span class=cF0> @@1
<a name="l77"></a>
<a name="l78"></a></span><span class=cFD>BDVD_MAIN</span><span class=cF0>::
<a name="l79"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cF1>U8</span><span class=cF0> [BDVD_BIOS_DRV_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="l80"></a>
<a name="l81"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>AH</span><span class=cF0>,0xF
<a name="l82"></a> </span><span class=cF1>INT</span><span class=cF0> 0x10
<a name="l83"></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="l84"></a>
<a name="l85"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>EAX</span><span class=cF0>,0x80000000
<a name="l86"></a> </span><span class=cF1>CPUID</span><span class=cF0>
<a name="l87"></a> </span><span class=cF1>CMP</span><span class=cF0> </span><span class=cFC>EAX</span><span class=cF0>,0x80000001
<a name="l88"></a> </span><span class=cF1>JB</span><span class=cF0> @@05
<a name="l89"></a>
<a name="l90"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>EAX</span><span class=cF0>,0x80000001
<a name="l91"></a> </span><span class=cF1>CPUID</span><span class=cF0>
<a name="l92"></a> </span><span class=cF1>BT</span><span class=cF0> </span><span class=cFC>EDX</span><span class=cF0>,29
<a name="l93"></a> </span><span class=cF1>JC</span><span class=cF0> @@15
<a name="l94"></a>@@05: </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>SI</span><span class=cF0>,BDVD_NOT64_MSG-</span><span class=cFD>BDVD_START</span><span class=cF0>
<a name="l95"></a> </span><span class=cF1>CALL</span><span class=cF0> </span><span class=cFD>BDVD_PUTS</span><span class=cF0>
<a name="l96"></a>@@10: </span><span class=cF1>JMP</span><span class=cF0> @@10
<a name="l97"></a>
<a name="l98"></a>@@15: </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>SI</span><span class=cF0>,BDVD_TEMPLEOS_MSG-</span><span class=cFD>BDVD_START</span><span class=cF0>
<a name="l99"></a> </span><span class=cF1>CALL</span><span class=cF0> </span><span class=cFD>BDVD_PUTS</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>AX</span><span class=cF0>,</span><span class=cF3>BOOT_RAM_BASE</span><span class=cF0>/16
<a name="l102"></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="l103"></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="l104"></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_CNT</span><span class=cF0>-</span><span class=cFD>BDVD_START</span><span class=cF0>]
<a name="l105"></a>
<a name="l106"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>EAX</span><span class=cF0>,(80-7-9)*65536 </span><span class=cF2>//80 columns</span><span class=cF0>
<a name="l107"></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="l108"></a> </span><span class=cF1>DIV</span><span class=cF0> </span><span class=cFC>ECX</span><span class=cF0>
<a name="l109"></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="l110"></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>],0
<a name="l111"></a>
<a name="l112"></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="l113"></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="l114"></a>
<a name="l115"></a>@@20: </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>CX</span><span class=cF0> </span><span class=cF2>//Blk cnt</span><span class=cF0>
<a name="l116"></a>
<a name="l117"></a></span><span class=cF2>//READ BLK</span><span class=cF0>
<a name="l118"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>AX</span><span class=cF0> </span><span class=cF2>//Blk lo</span><span class=cF0>
<a name="l119"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>DX</span><span class=cF0> </span><span class=cF2>//Blk hi</span><span class=cF0>
<a name="l120"></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="l121"></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="l122"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cF9>U16</span><span class=cF0> [BDVD_DAP_BLK+2-</span><span class=cFD>BDVD_START</span><span class=cF0>],</span><span class=cFC>DX</span><span class=cF0>
<a name="l123"></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="l124"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cF9>U16</span><span class=cF0> [BDVD_DAP_BUF+2-</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="l125"></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="l126"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>AH</span><span class=cF0>,0x42
<a name="l127"></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_DRV_NUM-</span><span class=cFD>BDVD_START</span><span class=cF0>]
<a name="l128"></a> </span><span class=cF1>INT</span><span class=cF0> 0x13
<a name="l129"></a>
<a name="l130"></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="l131"></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>/16
<a name="l132"></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="l133"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>DX</span><span class=cF0>
<a name="l134"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>AX</span><span class=cF0>
<a name="l135"></a> </span><span class=cF1>INC</span><span class=cF0> </span><span class=cFC>AX</span><span class=cF0>
<a name="l136"></a> </span><span class=cF1>JNZ</span><span class=cF0> @@25
<a name="l137"></a> </span><span class=cF1>INC</span><span class=cF0> </span><span class=cFC>DX</span><span class=cF0>
<a name="l138"></a>
<a name="l139"></a>@@25: </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>AX</span><span class=cF0>
<a name="l140"></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>+2-</span><span class=cFD>BDVD_START</span><span class=cF0>]
<a name="l141"></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="l142"></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="l143"></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>+2-</span><span class=cFD>BDVD_START</span><span class=cF0>],</span><span class=cFC>BX</span><span class=cF0>
<a name="l144"></a> </span><span class=cF1>JE</span><span class=cF0> @@30
<a name="l145"></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="l146"></a> </span><span class=cF1>CALL</span><span class=cF0> </span><span class=cFD>BDVD_PUT_CHAR</span><span class=cF0>
<a name="l147"></a>@@30: </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>AX</span><span class=cF0>
<a name="l148"></a>
<a name="l149"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>CX</span><span class=cF0>
<a name="l150"></a> </span><span class=cF1>LOOP</span><span class=cF0> @@20
<a name="l151"></a>
<a name="l152"></a></span><span class=cF2>//Shift backward to align</span><span class=cF0>
<a name="l153"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>DS</span><span class=cF0>
<a name="l154"></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="l155"></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>-4
<a name="l156"></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_CNT</span><span class=cF0>-</span><span class=cFD>BDVD_START</span><span class=cF0>]
<a name="l157"></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>/16
<a name="l158"></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="l159"></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="l160"></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="l161"></a>@@35: </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>CX</span><span class=cF0>
<a name="l162"></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="l163"></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="l164"></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>/4
<a name="l165"></a> </span><span class=cF1>REP_MOVSD</span><span class=cF0>
<a name="l166"></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="l167"></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>/16
<a name="l168"></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="l169"></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="l170"></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>/16
<a name="l171"></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="l172"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>CX</span><span class=cF0>
<a name="l173"></a> </span><span class=cF1>LOOP</span><span class=cF0> @@35
<a name="l174"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>DS</span><span class=cF0>
<a name="l175"></a>
<a name="l176"></a></span><span class=cF2>//See </span><a href="/Wb/Kernel/BlkDev/DskATAId.HC.HTML#l1"><span class=cF4>BootDVDProbe</span></a><span class=cF2>().</span><span class=cF0>
<a name="l177"></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="l178"></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="l179"></a> </span><span class=cF1>SHL</span><span class=cF0> </span><span class=cFC>EAX</span><span class=cF0>,16
<a name="l180"></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="l181"></a>
<a name="l182"></a></u></span><span class=cF2>//My assembler doesn't support 16-bit very well.</span><span class=cF0>
<a name="l183"></a> </span><span class=cF1>DU8</span><span class=cF0> 0xEA; </span><span class=cF2>//JMP BOOT_RAM_BASE:0000</span><span class=cF0>
<a name="l184"></a> </span><span class=cF1>DU16</span><span class=cF0> 0,</span><span class=cF3>BOOT_RAM_BASE</span><span class=cF0>/16;
<a name="l185"></a></span><span class=cF2>//Continues here </span><a href="/Wb/Kernel/KStart16.HC.HTML#l1"><span class=cF4>::/Kernel/KStart16.HC</span></a><span class=cF0>
<a name="l186"></a></span><span class=cFD>BDVD_END</span><span class=cF0>::
<a name="l187"></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="l188"></a>}
</span></pre></body>
</html>
Reference in New Issue Copy Permalink