Unit Instance

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{
    "translation": "https://translate-dev.freebsd.org/api/translations/freebsd-doc/boooks_arch-handbook/en/?format=api",
    "source": [
        "As <filename>boot0</filename> is loaded by the <acronym>BIOS</acronym> to address <literal>0x7C00</literal>, it copies itself to address <literal>0x600</literal> and then transfers control there (recall that it was linked to execute at address <literal>0x600</literal>). The source address, <literal>0x7c00</literal>, is copied to register <literal>%si</literal>. The destination address, <literal>0x600</literal>, to register <literal>%di</literal>. The number of bytes to copy, <literal>512</literal> (the program's size), is copied to register <literal>%cx</literal>. Next, the <literal>rep</literal> instruction repeats the instruction that follows, that is, <literal>movsb</literal>, the number of times dictated by the <literal>%cx</literal> register. The <literal>movsb</literal> instruction copies the byte pointed to by <literal>%si</literal> to the address pointed to by <literal>%di</literal>. This is repeated another 511 times. On each repetition, both the source and destination registers, <literal>%si</literal> and <literal>%di</literal>, are incremented by one. Thus, upon completion of the 512-byte copy, <literal>%di</literal> has the value <literal>0x600</literal>+<literal>512</literal>= <literal>0x800</literal>, and <literal>%si</literal> has the value <literal>0x7c00</literal>+<literal>512</literal>= <literal>0x7e00</literal>; we have thus completed the code <emphasis>relocation</emphasis>."
    ],
    "previous_source": "",
    "target": [
        "As <filename>boot0</filename> is loaded by the <acronym>BIOS</acronym> to address <literal>0x7C00</literal>, it copies itself to address <literal>0x600</literal> and then transfers control there (recall that it was linked to execute at address <literal>0x600</literal>). The source address, <literal>0x7c00</literal>, is copied to register <literal>%si</literal>. The destination address, <literal>0x600</literal>, to register <literal>%di</literal>. The number of bytes to copy, <literal>512</literal> (the program's size), is copied to register <literal>%cx</literal>. Next, the <literal>rep</literal> instruction repeats the instruction that follows, that is, <literal>movsb</literal>, the number of times dictated by the <literal>%cx</literal> register. The <literal>movsb</literal> instruction copies the byte pointed to by <literal>%si</literal> to the address pointed to by <literal>%di</literal>. This is repeated another 511 times. On each repetition, both the source and destination registers, <literal>%si</literal> and <literal>%di</literal>, are incremented by one. Thus, upon completion of the 512-byte copy, <literal>%di</literal> has the value <literal>0x600</literal>+<literal>512</literal>= <literal>0x800</literal>, and <literal>%si</literal> has the value <literal>0x7c00</literal>+<literal>512</literal>= <literal>0x7e00</literal>; we have thus completed the code <emphasis>relocation</emphasis>."
    ],
    "id_hash": 7019296161213301053,
    "content_hash": 7019296161213301053,
    "location": "book.translate.xml:650",
    "context": "",
    "note": "(itstool) path: sect1/para",
    "flags": "",
    "labels": [],
    "state": 100,
    "fuzzy": false,
    "translated": true,
    "approved": false,
    "position": 77,
    "has_suggestion": false,
    "has_comment": false,
    "has_failing_check": true,
    "num_words": 149,
    "source_unit": "https://translate-dev.freebsd.org/api/units/229386/?format=api",
    "priority": 100,
    "id": 229386,
    "web_url": "https://translate-dev.freebsd.org/translate/freebsd-doc/boooks_arch-handbook/en/?checksum=e1698cab3661c13d",
    "url": "https://translate-dev.freebsd.org/api/units/229386/?format=api",
    "explanation": "",
    "extra_flags": "",
    "pending": false,
    "timestamp": "2021-01-09T14:37:12.442477Z"
}