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Warning: Cannot modify header information - headers already sent in /usr/local/www/mediawiki/includes/WebResponse.php on line 38 http://fileformats.archiveteam.org/index.php?action=history&feed=atom&title=PC-DOS_720K_formatPC-DOS 720K format - Revision history2024-06-12T20:38:06ZRevision history for this page on the wikiMediaWiki 1.19.2 Warning: require(): Unable to allocate memory for pool. in /usr/local/www/mediawiki/includes/AutoLoader.php on line 1007
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:IBM]]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:IBM]]</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:Microsoft]]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:Microsoft]]</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">[[Category:MS-DOS]]</ins></div></td></tr>
</table>Jsummershttp://fileformats.archiveteam.org/index.php?title=PC-DOS_720K_format&diff=17117&oldid=prevDan Tobias at 02:30, 22 April 20142014-04-22T02:30:09Z<p></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>3 1/2" disks are actually 90 mm wide, but are almost universally referred to as "3 1/2 inch" disks even in countries that use the metric system.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>3 1/2" disks are actually 90 mm wide, but are almost universally referred to as "3 1/2 inch" disks even in countries that use the metric system.</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">The [[Commodore 1581 disk]] had a sufficiently similar low-level format to allow for software-based transfer and emulation between the two sorts of disks and drives.</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:IBM]]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:IBM]]</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:Microsoft]]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:Microsoft]]</div></td></tr>
</table>Dan Tobiashttp://fileformats.archiveteam.org/index.php?title=PC-DOS_720K_format&diff=17116&oldid=prevDan Tobias at 02:29, 22 April 20142014-04-22T02:29:18Z<p></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>|subcat=Floppy disk</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>|subcat=Floppy disk</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>}}</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>}}</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del style="color: red; font-weight: bold; text-decoration: none;"></del></div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The '''PC-DOS 720K format''' (3 1/2", double sided, double density) was a very common floppy disk format in the late 1980s and into the 1990s, used on IBM PCs and compatibles. It was the main 3 1/2" disk format for the PC platform until the high-density [[PC-DOS 1.44M format]] was introduced. It had 80 tracks per side, with 9 sectors per track, and 512 bytes per sector. Data was stored with [[MFM encoding]]. The disk turned at 300 RPM.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The '''PC-DOS 720K format''' (3 1/2", double sided, double density) was a very common floppy disk format in the late 1980s and into the 1990s, used on IBM PCs and compatibles. It was the main 3 1/2" disk format for the PC platform until the high-density [[PC-DOS 1.44M format]] was introduced. It had 80 tracks per side, with 9 sectors per track, and 512 bytes per sector. Data was stored with [[MFM encoding]]. The disk turned at 300 RPM.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
</table>Dan Tobiashttp://fileformats.archiveteam.org/index.php?title=PC-DOS_720K_format&diff=11476&oldid=prevDan Tobias at 19:20, 9 May 20132013-05-09T19:20:33Z<p></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>In the late '80s and early '90s, it was common for desktop PCs to have both 5 1/4" and 3 1/2" disk drives in order to be compatible with all software and data, which might be distributed on either format. Often the 5 1/4" drive was drive A, and the 3 1/2" one was drive B. Later PCs, however, were more likely to have only a 3 1/2" drive, set up to respond to both drive letters. Eventually, PCs stopped having floppy disk drives altogether as other data storage and transfer media took over.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>In the late '80s and early '90s, it was common for desktop PCs to have both 5 1/4" and 3 1/2" disk drives in order to be compatible with all software and data, which might be distributed on either format. Often the 5 1/4" drive was drive A, and the 3 1/2" one was drive B. Later PCs, however, were more likely to have only a 3 1/2" drive, set up to respond to both drive letters. Eventually, PCs stopped having floppy disk drives altogether as other data storage and transfer media took over.</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">3 1/2" disks are actually 90 mm wide, but are almost universally referred to as "3 1/2 inch" disks even in countries that use the metric system.</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:IBM]]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:IBM]]</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:Microsoft]]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:Microsoft]]</div></td></tr>
</table>Dan Tobiashttp://fileformats.archiveteam.org/index.php?title=PC-DOS_720K_format&diff=11439&oldid=prevDan Tobias at 17:23, 7 May 20132013-05-07T17:23:32Z<p></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>}}</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>}}</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>The '''PC-DOS 720K format''' (3 1/2", double sided, double density) was a very common floppy disk format in the late 1980s and into the 1990s, used on IBM PCs and compatibles. It was the main 3 1/2" disk format for the PC platform until the high-density [[PC-DOS 1.<del class="diffchange diffchange-inline">44MB </del>format]] was introduced. It had 80 tracks per side, with 9 sectors per track, and 512 bytes per sector. Data was stored with [[MFM encoding]]. The disk turned at 300 RPM.</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>The '''PC-DOS 720K format''' (3 1/2", double sided, double density) was a very common floppy disk format in the late 1980s and into the 1990s, used on IBM PCs and compatibles. It was the main 3 1/2" disk format for the PC platform until the high-density [[PC-DOS 1.<ins class="diffchange diffchange-inline">44M </ins>format]] was introduced. It had 80 tracks per side, with 9 sectors per track, and 512 bytes per sector. Data was stored with [[MFM encoding]]. The disk turned at 300 RPM.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>These disks were generally used with [[FAT12]] file systems under the MS-DOS or PC-DOS operating system. The disks held exactly twice as much data as the earlier 5 1/4" [[PC-DOS 360K format]], even though the disks were smaller.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>These disks were generally used with [[FAT12]] file systems under the MS-DOS or PC-DOS operating system. The disks held exactly twice as much data as the earlier 5 1/4" [[PC-DOS 360K format]], even though the disks were smaller.</div></td></tr>
</table>Dan Tobiashttp://fileformats.archiveteam.org/index.php?title=PC-DOS_720K_format&diff=11438&oldid=prevDan Tobias at 12:46, 7 May 20132013-05-07T12:46:44Z<p></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>These disks were generally used with [[FAT12]] file systems under the MS-DOS or PC-DOS operating system. The disks held exactly twice as much data as the earlier 5 1/4" [[PC-DOS 360K format]], even though the disks were smaller.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>These disks were generally used with [[FAT12]] file systems under the MS-DOS or PC-DOS operating system. The disks held exactly twice as much data as the earlier 5 1/4" [[PC-DOS 360K format]], even though the disks were smaller.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>The [[PC-DOS 1.44M format]] later took over much floppy-disk usage, though the lower-density 720K disks remained in use as well, with the high-density drives supporting both formats (though there could be compatibility issues in reading 720K disks on low-density drives after they were written to with a high-density drive, even though the writing is done in an emulation of the old format, due to the different drive head on the newer drives).</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div>The [[PC-DOS 1.44M format]] later took over much floppy-disk usage, though the lower-density 720K disks remained in use as well, with the high-density drives supporting both formats (though there could be compatibility issues in reading 720K disks on low-density drives after they were written to with a high-density drive, even though the writing is done in an emulation of the old format, due to the different drive head on the newer drives<ins class="diffchange diffchange-inline">; this sort of incompatibility might, however, not have been as common as that between the high and low density 5 1/4" disks</ins>).</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>In the late '80s and early '90s, it was common for desktop PCs to have both 5 1/4" and 3 1/2" disk drives in order to be compatible with all software and data, which might be distributed on either format. Often the 5 1/4" drive was drive A, and the 3 1/2" one was drive B. Later PCs, however, were more likely to have only a 3 1/2" drive, set up to respond to both drive letters. Eventually, PCs stopped having floppy disk drives altogether as other data storage and transfer media took over.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>In the late '80s and early '90s, it was common for desktop PCs to have both 5 1/4" and 3 1/2" disk drives in order to be compatible with all software and data, which might be distributed on either format. Often the 5 1/4" drive was drive A, and the 3 1/2" one was drive B. Later PCs, however, were more likely to have only a 3 1/2" drive, set up to respond to both drive letters. Eventually, PCs stopped having floppy disk drives altogether as other data storage and transfer media took over.</div></td></tr>
</table>Dan Tobiashttp://fileformats.archiveteam.org/index.php?title=PC-DOS_720K_format&diff=11432&oldid=prevDan Tobias at 03:36, 7 May 20132013-05-07T03:36:43Z<p></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The [[PC-DOS 1.44M format]] later took over much floppy-disk usage, though the lower-density 720K disks remained in use as well, with the high-density drives supporting both formats (though there could be compatibility issues in reading 720K disks on low-density drives after they were written to with a high-density drive, even though the writing is done in an emulation of the old format, due to the different drive head on the newer drives).</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The [[PC-DOS 1.44M format]] later took over much floppy-disk usage, though the lower-density 720K disks remained in use as well, with the high-density drives supporting both formats (though there could be compatibility issues in reading 720K disks on low-density drives after they were written to with a high-density drive, even though the writing is done in an emulation of the old format, due to the different drive head on the newer drives).</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">In the late '80s and early '90s, it was common for desktop PCs to have both 5 1/4" and 3 1/2" disk drives in order to be compatible with all software and data, which might be distributed on either format. Often the 5 1/4" drive was drive A, and the 3 1/2" one was drive B. Later PCs, however, were more likely to have only a 3 1/2" drive, set up to respond to both drive letters. Eventually, PCs stopped having floppy disk drives altogether as other data storage and transfer media took over.</ins></div></td></tr>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:IBM]]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:IBM]]</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:Microsoft]]</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:Microsoft]]</div></td></tr>
</table>Dan Tobiashttp://fileformats.archiveteam.org/index.php?title=PC-DOS_720K_format&diff=11430&oldid=prevDan Tobias: Created page with "{{FormatInfo |formattype=physical |subcat=Floppy disk }} The '''PC-DOS 720K format''' (3 1/2", double sided, double density) was a very common floppy disk format in the late ..."2013-05-07T03:32:06Z<p>Created page with "{{FormatInfo |formattype=physical |subcat=Floppy disk }} The '''PC-DOS 720K format''' (3 1/2", double sided, double density) was a very common floppy disk format in the late ..."</p>
<p><b>New page</b></p><div>{{FormatInfo<br />
|formattype=physical<br />
|subcat=Floppy disk<br />
}}<br />
<br />
The '''PC-DOS 720K format''' (3 1/2", double sided, double density) was a very common floppy disk format in the late 1980s and into the 1990s, used on IBM PCs and compatibles. It was the main 3 1/2" disk format for the PC platform until the high-density [[PC-DOS 1.44MB format]] was introduced. It had 80 tracks per side, with 9 sectors per track, and 512 bytes per sector. Data was stored with [[MFM encoding]]. The disk turned at 300 RPM.<br />
<br />
These disks were generally used with [[FAT12]] file systems under the MS-DOS or PC-DOS operating system. The disks held exactly twice as much data as the earlier 5 1/4" [[PC-DOS 360K format]], even though the disks were smaller.<br />
<br />
The [[PC-DOS 1.44M format]] later took over much floppy-disk usage, though the lower-density 720K disks remained in use as well, with the high-density drives supporting both formats (though there could be compatibility issues in reading 720K disks on low-density drives after they were written to with a high-density drive, even though the writing is done in an emulation of the old format, due to the different drive head on the newer drives).<br />
<br />
[[Category:IBM]]<br />
[[Category:Microsoft]]</div>Dan Tobias Warning: require(): Unable to allocate memory for pool. in /usr/local/www/mediawiki/includes/AutoLoader.php on line 1007
Warning: require(): Unable to allocate memory for pool. in /usr/local/www/mediawiki/includes/AutoLoader.php on line 1007