https://wikiti.brandonw.net/index.php?action=history&feed=atom&title=83Plus%3ASoftware%3Ausb8x%2FAsm_Interface%2FMSD%2FFAT_lookupPath83Plus:Software:usb8x/Asm Interface/MSD/FAT lookupPath - Revision history2026-04-08T08:33:17ZRevision history for this page on the wikiMediaWiki 1.23.5https://wikiti.brandonw.net/index.php?title=83Plus:Software:usb8x/Asm_Interface/MSD/FAT_lookupPath&diff=5064&oldid=prevBrandonw at 08:59, 17 August 20062006-08-17T08:59:18Z<p></p>
<p><b>New page</b></p><div>== Synopsis ==<br />
'''Name:''' FAT_lookupPath<br />
<br />
'''Minimum usb8x version:''' 0.10<br />
<br />
Determines whether a file/directory exists.<br />
<br />
=== Inputs ===<br />
* HL points to an ASCIIZ string containing a path to a file/directory<br />
<br />
=== Outputs ===<br />
* HL points to the 32-byte directory entry for the file/directory<br />
* C set if not found<br />
<br />
=== Destroys ===<br />
* AF, BC, DE, HL<br />
<br />
== Notes ==<br />
This routine will also point to the directory entry if found (useful for [[../DOS_getFileSize|DOS_getFileSize]], for example).<br />
Example code to find whether "readme.txt" exists in the "test" directory:<br />
<code><br />
ld hl,sFilename<br />
U_CALL FAT_lookupPath<br />
;HL points to directory entry<br />
jr c,notFound<br />
...<br />
notFound:<br />
...<br />
sFilename: DB "/test/readme.txt",0<br />
</code><br />
If you are writing an application, you must copy the strings you use to RAM first, or else usb8x will not be able to see them.<br />
<br />
== See Also ==<br />
* [[../DOS_getFileSize|DOS_getFileSize]] - Get file size for specified directory entry</div>Brandonw