139 lines
15 KiB
HTML
Executable File
139 lines
15 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_MHD</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_MHD"</span><span class=cF0>,</span><span class=cF6>"%08X"</span><span class=cF0>,</span><span class=cF3>BOOT_HIGH_LOC_MHD</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>BMHD_START</span><span class=cF0>::
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<a name="l11"></a></span><span class=cFD>BMHD_CODE</span><span class=cF0>::
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<a name="l12"></a> </span><span class=cF1>CLD</span><span class=cF0>
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<a name="l13"></a>
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<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_MHD</span><span class=cF0>
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<a name="l15"></a>
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<a name="l16"></a> </span><span class=cF1>CLI</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>SS</span><span class=cF0>,</span><span class=cFC>AX</span><span class=cF0>
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<a name="l18"></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="l19"></a> </span><span class=cF1>STI</span><span class=cF0>
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<a name="l20"></a>
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<a name="l21"></a> </span><span class=cF1>PUSHFW</span><span class=cF0>
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<a name="l22"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>DS</span><span class=cF0>
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<a name="l23"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>ES</span><span class=cF0>
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<a name="l24"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>FS</span><span class=cF0>
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<a name="l25"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>GS</span><span class=cF0>
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<a name="l26"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>ECX</span><span class=cF0>
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<a name="l27"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>EBX</span><span class=cF0>
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<a name="l28"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>EDX</span><span class=cF0>
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<a name="l29"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>EBP</span><span class=cF0>
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<a name="l30"></a>
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<a name="l31"></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="l32"></a>
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<a name="l33"></a> </span><span class=cF1>CALL</span><span class=cF0> BMHD_GET_RIP
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<a name="l34"></a>BMHD_GET_RIP:
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<a name="l35"></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="l36"></a> </span><span class=cF1>SUB</span><span class=cF0> </span><span class=cFC>BX</span><span class=cF0>,BMHD_GET_RIP-</span><span class=cFD>BMHD_START</span><span class=cF0>
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<a name="l37"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>CX</span><span class=cF0>,</span><span class=cFC>BX</span><span class=cF0>
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<a name="l38"></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="l39"></a></span><span class=cF2>//This copies this bootloader's code to 0x00096C00</span><span class=cF0>
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<a name="l40"></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="l41"></a> </span><span class=cF1>PUSH</span><span class=cF0> </span><span class=cFC>AX</span><span class=cF0>
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<a name="l42"></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="l43"></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="l44"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cF9>U16</span><span class=cF0> [BMHD_OLD_CS_RIP-</span><span class=cFD>BMHD_START</span><span class=cF0>],</span><span class=cFC>CX</span><span class=cF0>
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<a name="l45"></a> </span><span class=cF1>POP</span><span class=cF0> </span><span class=cF9>U16</span><span class=cF0> [BMHD_OLD_CS_RIP+2-</span><span class=cFD>BMHD_START</span><span class=cF0>]
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<a name="l46"></a>
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<a name="l47"></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="l48"></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="l49"></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="l50"></a> </span><span class=cF1>REP_MOVSB</span><span class=cF0>
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<a name="l51"></a>
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<a name="l52"></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_MHD</span><span class=cF0>
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<a name="l53"></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="l54"></a>
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<a name="l55"></a></span><span class=cF2>//My assembler doesn't support 16-bit very well.</span><span class=cF0>
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<a name="l56"></a> </span><span class=cF1>DU8</span><span class=cF0> 0xEA; </span><span class=cF2>//JMP BOOT_HIGH_LOC_MHD:BMHD_HISTART</span><span class=cF0>
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<a name="l57"></a> </span><span class=cF1>DU16</span><span class=cF0> BMHD_HISTART-</span><span class=cFD>BMHD_START</span><span class=cF0>,</span><span class=cF3>BOOT_HIGH_LOC_MHD</span><span class=cF0>;
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<a name="l58"></a>
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<a name="l59"></a>BMHD_BIOS_DRV_NUM: </span><span class=cF1>DU8</span><span class=cF0> 0;
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<a name="l60"></a>BMHD_OLD_CS_RIP: </span><span class=cF1>DU16</span><span class=cF0> 0,0;
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<a name="l61"></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="l62"></a></span><span class=cFD>BMHD_BLK_CNT</span><span class=cF0>:: </span><span class=cF1>DU16</span><span class=cF0> 0;
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<a name="l63"></a>
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<a name="l64"></a>BMHD_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="l65"></a>BMHD_DAP_BUF: </span><span class=cF1>DU16</span><span class=cF0> 0,0;
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<a name="l66"></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="l67"></a></span><span class=cFD>BMHD_DAP_BLK</span><span class=cF0>:: </span><span class=cF2>//64-bit</span><span class=cF0>
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<a name="l68"></a>BMHD_DAP_BLK_LO: </span><span class=cF1>DU32</span><span class=cF0> 0;
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<a name="l69"></a>BMHD_DAP_BLK_HI: </span><span class=cF1>DU32</span><span class=cF0> 0;
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<a name="l70"></a>
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<a name="l71"></a>BMHD_HISTART:
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<a name="l72"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cF1>U8</span><span class=cF0> [BMHD_BIOS_DRV_NUM-</span><span class=cFD>BMHD_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="l73"></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="l74"></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="l75"></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="l76"></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>BMHD_BLK_CNT</span><span class=cF0>-</span><span class=cFD>BMHD_START</span><span class=cF0>]
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<a name="l77"></a>
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<a name="l78"></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="l79"></a>
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<a name="l80"></a></span><span class=cF2>//READ BLK</span><span class=cF0>
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<a name="l81"></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="l82"></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="l83"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cF9>U16</span><span class=cF0> [BMHD_DAP_BUF+2-</span><span class=cFD>BMHD_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="l84"></a> </span><span class=cF1>MOV</span><span class=cF0> </span><span class=cFC>SI</span><span class=cF0>,BMHD_DAP-</span><span class=cFD>BMHD_START</span><span class=cF0> </span><span class=cF2>//DS:SI=DAP</span><span class=cF0>
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<a name="l85"></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="l86"></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> [BMHD_BIOS_DRV_NUM-</span><span class=cFD>BMHD_START</span><span class=cF0>]
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<a name="l87"></a> </span><span class=cF1>INT</span><span class=cF0> 0x13
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<a name="l88"></a>
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<a name="l89"></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="l90"></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="l91"></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="l92"></a> </span><span class=cF1>INC</span><span class=cF0> </span><span class=cF9>U32</span><span class=cF0> [BMHD_DAP_BLK_LO-</span><span class=cFD>BMHD_START</span><span class=cF0>]
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<a name="l93"></a> </span><span class=cF1>JNZ</span><span class=cF0> @@10
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<a name="l94"></a> </span><span class=cF1>INC</span><span class=cF0> </span><span class=cF9>U32</span><span class=cF0> [BMHD_DAP_BLK_HI-</span><span class=cFD>BMHD_START</span><span class=cF0>]
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<a name="l95"></a>
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<a name="l96"></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="l97"></a> </span><span class=cF1>LOOP</span><span class=cF0> @@05
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<a name="l98"></a>
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<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> [BMHD_BIOS_DRV_NUM-</span><span class=cFD>BMHD_START</span><span class=cF0>]
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<a name="l100"></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> [BMHD_OLD_CS_RIP-</span><span class=cFD>BMHD_START</span><span class=cF0>]
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<a name="l101"></a></span><span class=cF2>//My assembler doesn't support 16-bit very well.</span><span class=cF0>
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<a name="l102"></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="l103"></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="l104"></a></span><span class=cF2>//Continues here </span><a href="/Wb/Adam/Opt/Boot/BootMHD2.HC.HTML#l10"><span class=cF4>BMHD2_START</span></a><span class=cF0>
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<a name="l105"></a></span><span class=cFD>BMHD_END</span><span class=cF0>::
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<a name="l106"></a>#</span><span class=cF1>assert</span><span class=cF0> </span><span class=cFD>BMHD_END</span><span class=cF0>-</span><span class=cFD>BMHD_START</span><span class=cF0><=440
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<a name="l107"></a>}
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</span></pre></body>
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