125 lines
13 KiB
HTML
Executable File
125 lines
13 KiB
HTML
Executable File
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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> 1*</span><span class=cF3>BLK_SIZE</span><span class=cF0>
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<a name="l2"></a>#</span><span class=cF1>define</span><span class=cF0> </span><span class=cF3>BOOT_HIGH_LOC_HD</span><span class=cF0> (</span><span class=cF7>(</span><span class=cF3>BOOT_RAM_LIMIT</span><span class=cF0>-\
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<a name="l3"></a> (</span><span class=cF3>BOOT_STK_SIZE</span><span class=cF0>+</span><span class=cF3>MODULE_SIZE</span><span class=cF0>)</span><span class=cF7>)</span><span class=cF0>>>4)
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<a name="l4"></a>
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<a name="l5"></a></span><span class=cF5>DefinePrint</span><span class=cF0>(
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<a name="l6"></a> </span><span class=cF6>"DD_BOOT_HIGH_LOC_HD"</span><span class=cF0>,</span><span class=cF6>"%08X"</span><span class=cF0>,</span><span class=cF3>BOOT_HIGH_LOC_HD</span><span class=cF0><<4);
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<a name="l7"></a>
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<a name="l8"></a></span><span class=cF1>asm</span><span class=cF0> {
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<a name="l9"></a></span><span class=cF1>USE16</span><span class=cF0>
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<a name="l10"></a></span><span class=cFD>BHD_CODE</span><span class=cF0>::
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<a name="l11"></a>
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<a name="l12"></a>#</span><span class=cF1>define</span><span class=cF0> </span><span class=cF3>BHD_START</span><span class=cF0> (</span><span class=cFD>BHD_CODE</span><span class=cF0>-</span><span class=cF1>offset</span><span class=cF7>(</span><span class=cF9>CFAT32Boot</span><span class=cF0>.code</span><span class=cF7>)</span><span class=cF0>)
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<a name="l13"></a>
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<a name="l14"></a> </span><span class=cF1>CLD</span><span class=cF0>
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<a name="l15"></a>
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<a name="l16"></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_HD</span><span class=cF0>
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<a name="l17"></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>
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<a name="l18"></a>
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<a name="l19"></a> </span><span class=cF1>CLI</span><span class=cF0>
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<a name="l20"></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>
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<a name="l21"></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>MODULE_SIZE</span><span class=cF0>
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<a name="l22"></a> </span><span class=cF1>STI</span><span class=cF0>
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<a name="l23"></a>
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<a name="l24"></a> </span><span class=cF1>CALL</span><span class=cF0> BHD_GET_RIP
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<a name="l25"></a>BHD_GET_RIP:
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<a name="l26"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>BX</span><span class=cF0>
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<a name="l27"></a> </span><span class=cF1>SUB</span><span class=cF0> </span><span class=cFC>BX</span><span class=cF0>,BHD_GET_RIP-</span><span class=cF3>BHD_START</span><span class=cF0>
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<a name="l28"></a> </span><span class=cF1>SHR</span><span class=cF0> </span><span class=cFC>BX</span><span class=cF0>,4
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<a name="l29"></a></span><span class=cF2>//This copies this bootloader's code to 0x00096C00</span><span class=cF0>
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<a name="l30"></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>
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<a name="l31"></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>
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<a name="l32"></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>
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<a name="l33"></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>
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<a name="l34"></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>
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<a name="l35"></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>
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<a name="l36"></a> </span><span class=cF1>REP_MOVSB</span><span class=cF0>
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<a name="l37"></a>
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<a name="l38"></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_HD</span><span class=cF0>
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<a name="l39"></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>
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<a name="l40"></a>
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<a name="l41"></a></span><span class=cF2>//My assembler doesn't support 16-bit very well.</span><span class=cF0>
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<a name="l42"></a> </span><span class=cF1>DU8</span><span class=cF0> 0xEA; </span><span class=cF2>//JMP BOOT_HIGH_LOC_HD:BHD_HISTART</span><span class=cF0>
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<a name="l43"></a> </span><span class=cF1>DU16</span><span class=cF0> BHD_HISTART-</span><span class=cF3>BHD_START</span><span class=cF0>,</span><span class=cF3>BOOT_HIGH_LOC_HD</span><span class=cF0>;
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<a name="l44"></a>
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<a name="l45"></a>BHD_BIOS_DRV_NUM: </span><span class=cF1>DU8</span><span class=cF0> 0;
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<a name="l46"></a>
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<a name="l47"></a></span><span class=cF2>//Gets patched by </span><a href="/Wb/Adam/Opt/Boot/BootHDIns.HC.HTML#l18"><span class=cF4>BootHDIns</span></a><span class=cF2>().</span><span class=cF0>
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<a name="l48"></a></span><span class=cFD>BHD_BLK_CNT</span><span class=cF0>:: </span><span class=cF1>DU16</span><span class=cF0> 0;
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<a name="l49"></a>
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<a name="l50"></a>BHD_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>
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<a name="l51"></a>BHD_DAP_BUF: </span><span class=cF1>DU16</span><span class=cF0> 0,0;
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<a name="l52"></a></span><span class=cF2>//Gets patched by </span><a href="/Wb/Adam/Opt/Boot/BootHDIns.HC.HTML#l18"><span class=cF4>BootHDIns</span></a><span class=cF2>().</span><span class=cF0>
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<a name="l53"></a></span><span class=cFD>BHD_DAP_BLK</span><span class=cF0>:: </span><span class=cF2>//64-bit</span><span class=cF0>
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<a name="l54"></a>BHD_DAP_BLK_LO: </span><span class=cF1>DU32</span><span class=cF0> 0;
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<a name="l55"></a>BHD_DAP_BLK_HI: </span><span class=cF1>DU32</span><span class=cF0> 0;
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<a name="l56"></a>
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<a name="l57"></a>BHD_HISTART:
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<a name="l58"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cF1>U8</span><span class=cF0> [BHD_BIOS_DRV_NUM-</span><span class=cF3>BHD_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>
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<a name="l59"></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
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<a name="l60"></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>
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<a name="l61"></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>
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<a name="l62"></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>BHD_BLK_CNT</span><span class=cF0>-</span><span class=cF3>BHD_START</span><span class=cF0>]
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<a name="l63"></a>
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<a name="l64"></a>@@05: </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>
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<a name="l65"></a>
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<a name="l66"></a></span><span class=cF2>//READ BLK</span><span class=cF0>
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<a name="l67"></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>
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<a name="l68"></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>
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<a name="l69"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cF9>U16</span><span class=cF0> [BHD_DAP_BUF+2-</span><span class=cF3>BHD_START</span><span class=cF0>],</span><span class=cFC>AX</span><span class=cF0> </span><span class=cF2>//ES:0000</span><span class=cF0>
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<a name="l70"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>SI</span><span class=cF0>,BHD_DAP-</span><span class=cF3>BHD_START</span><span class=cF0> </span><span class=cF2>//DS:SI=DAP</span><span class=cF0>
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<a name="l71"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>AH</span><span class=cF0>,0x42
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<a name="l72"></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> [BHD_BIOS_DRV_NUM-</span><span class=cF3>BHD_START</span><span class=cF0>]
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<a name="l73"></a> </span><span class=cF1>INT</span><span class=cF0> 0x13
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<a name="l74"></a>
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<a name="l75"></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>
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<a name="l76"></a> </span><span class=cF1>ADD</span><span class=cF0> </span><span class=cFC>AX</span><span class=cF0>,</span><span class=cF3>BLK_SIZE</span><span class=cF0>/16
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<a name="l77"></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>
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<a name="l78"></a> </span><span class=cF1>INC</span><span class=cF0> </span><span class=cF9>U32</span><span class=cF0> [BHD_DAP_BLK_LO-</span><span class=cF3>BHD_START</span><span class=cF0>]
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<a name="l79"></a> </span><span class=cF1>JNZ</span><span class=cF0> @@10
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<a name="l80"></a> </span><span class=cF1>INC</span><span class=cF0> </span><span class=cF9>U32</span><span class=cF0> [BHD_DAP_BLK_HI-</span><span class=cF3>BHD_START</span><span class=cF0>]
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<a name="l81"></a>
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<a name="l82"></a>@@10: </span><span class=cF1>POP</span><span class=cF0> </span><span class=cFC>CX</span><span class=cF0>
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<a name="l83"></a> </span><span class=cF1>LOOP</span><span class=cF0> @@05
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<a name="l84"></a>
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<a name="l85"></a> </span><span class=cF1>XOR</span><span class=cF0> </span><span class=cFC>EBX</span><span class=cF0>,</span><span class=cFC>EBX</span><span class=cF0>
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<a name="l86"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>EAX</span><span class=cF0>,</span><span class=cF3>BOOT_SRC_HARDDRV</span><span class=cF0> </span><span class=cF2>//</span><span class=cF9><u>See sys_boot_src</span><span class=cF0>
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<a name="l87"></a></u></span><span class=cF2>//My assembler doesn't support 16-bit very well.</span><span class=cF0>
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<a name="l88"></a> </span><span class=cF1>DU8</span><span class=cF0> 0xEA; </span><span class=cF2>//JMP BOOT_RAM_BASE:0000</span><span class=cF0>
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<a name="l89"></a> </span><span class=cF1>DU16</span><span class=cF0> 0,</span><span class=cF3>BOOT_RAM_BASE</span><span class=cF0>/16;
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<a name="l90"></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>
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<a name="l91"></a></span><span class=cFD>BHD_END</span><span class=cF0>::
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<a name="l92"></a>#</span><span class=cF1>assert</span><span class=cF0> </span><span class=cFD>BHD_END</span><span class=cF0>-</span><span class=cF3>BHD_START</span><span class=cF0><</span><span class=cF3>MODULE_SIZE</span><span class=cF0>-2
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<a name="l93"></a>}
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</span></pre></body>
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</html>
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