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<p>in 1984, is MS-DOS 1.0 ported to <a href="page.php?w=Zilog_Z80">Z80</a>. In 1988, version 2 has facilities such as subdirectories, memory management, and environment strings. The MSX-DOS kernel resides in ROM (built-in on the disk controller) so basic file access capacity is available even without the command interpreter, by using <a href="page.php?w=BASIC">BASIC</a> extended commands.<br/>
*<a href="page.php?w=Disc_Filing_System">Disc Filing System</a> (DFS) is an optional component for the Acorn <a href="page.php?w=BBC_Micro">BBC Micro</a>,</p><p>
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