[int13con] Check %ah rather than %al for error code The error code (if any) from INT13,42 and INT13,43 is returned in %ah. The code currently erroneously checks the value in %al, which happens to work only because BIOSes will leave %al unmodified (i.e. containing zero) and the operation is extremely unlikely to ever actually fail. Fix by reading the error code from %ah instead of %al. Signed-off-by: Michael Brown <mcb30@ipxe.org>
iPXE is the leading open source network boot firmware. It provides a full PXE implementation enhanced with additional features such as:
boot from a web server via HTTP or HTTPS,
boot from an iSCSI, FCoE, or AoE SAN,
control the boot process with a script,
You can use iPXE to replace the existing PXE ROM on your network card, or you can chainload into iPXE to obtain the features of iPXE without the hassle of reflashing.
iPXE is free, open-source software licensed under the GNU GPL (with some portions under GPL-compatible licences).
You can download the rolling release binaries (built from the latest commit), or use the most recent stable release.
For full documentation, visit the iPXE website.
