3 9bootfat, 9bootiso, 9bootpxe \- bootloaders for pc FAT, ISO and PXE network booting
5 started by BIOS or chainloaded by partition bootsector
7 The bootloader is responsible for reading the
9 boot parameters and boot a kernel. It interprets the
11 parameter as a file path on the current boot media
12 to locate the kernel image. The path should be in all
15 wich supports case sensitive file names. Read parameters
16 are echoed on the console. The boot procedure
17 can be interrupted by pressing any key after the configuration
18 was read. Then a interactive boot console is shown with a
20 prompt. The syntax of the boot console is the same as in
25 will reset all current parameters and
27 will end the console and start booting the kernel. The boot
28 console is entered automatically when boot failed, no
30 parameter is specified or no
36 program is responsible for loading the kernel from
39 partition into memory and pass it the
41 boot parameters. It gets chainloaded by
43 wich locates it in the root of the active
49 is read from the root directory of the FAT
52 Booting from cdrom requires
54 to be included in the iso image under
57 set as a non emulation bootblock see
59 The BIOS loads the first 2K of
61 into memory and passes execution to it. The program
62 then reads the rest of its code from the file to chainload itself.
63 Boot parameters are read from
67 With a PXE capable BIOS and network card, it is possible for
70 from a tftp server and load the kernel from there. The
71 .B bootf=/386/9bootpxe
74 entry will tell the PXE BIOS to use it.
80 from the tftp server, where
82 is the mac address of the used network card
83 in lower case hex, and use it as
87 .BR /sys/src/boot/pc .