Dual booting with another operating system is the best way to use ZenithOS. I only use it in a virtual machine because it won't boot natively on my machine, though. For native dual booting, you need a partition for ZenithOS. Windows often comes with a restore disk that does not allow repartitioning. I recommend connecting a spare additional hard drive and using the $FG,2$BIOS$FG$ to select which drive to boot.
Two ZenithOS partitions are highly recommended, so you can boot to a back-up and fix the primary when you work on it. Odds are, you only need a couple gigabytes for your ZenithOS partitions.
$ID,2$This command mounts a drive making it accessible. For simplicity, sel $FG,2$'C'$FG$ as the first drive letter for your hard drive. The first partition will be $FG,2$'C'$FG$, second, $FG,2$'D'$FG$, etc. ZenithOS needs 3 numbers to utilize a hard drive -- base0, base1, and unit. When you enter a hexadecimal number, do it like in $FG,2$C$FG$ with a $FG,2$0x$FG$ prefix. If the probe was successful, you can just enter the number in the probe box instead of base0.
$ID,2$This will perform a special $LK,"Mount",A="MN:Mount"$() automatically.
$BK,1$WARNING:$BK,0$ This command erases everything on a hard drive. It repartitions a whole drive and formats the partitions$FG$. This command should be skipped if you already have your hard drive partitioned.
$BK,1$WARNING:$BK,0$ This command doesn't play well with other operating systems. You'll need to do a $LK,"BootMHDZero",A="MN:BootMHDZero"$() to restore your drive to a state where other operating systems can partition it.
$ID,2$This command formats a drive with $FG,2$FAT32$FG$ or the $LK,"RedSea",A="FI:::/Doc/RedSea.DD"$ file system type. Use the drive letter of the partition in place of $FG,2$'D'$FG$.
$BK,1$WARNING:$BK,0$ If you are upgrading, be sure not to lose the file, $FG,2$/0000Boot/OldMBR.BIN.C$FG$.
$ID,2$This command recompiles the source code on a drive and writes to the $UL,1$drive's$UL,0$ boot record. You'll need to reenter the $LK,"Mount",A="MN:Mount"$ information so it can be stored in the kernel.
The $LK,"BootMHDIns",A="MN:BootMHDIns"$() command places a boot loader on a drive. It saves the old master boot record to $FG,2$/0000Boot/OldMBR.BIN.C$FG$ and replaces it. When you boot, you will have the option of booting the old master boot record. This command can be skipped if you already have a boot loader. Be sure not to lose the copy of the old boot record, like if you reformat the drive.
Delete $FG,2$/0000Boot/OldMBR.BIN.C$FG$ if you want to get a fresh copy of a mbr, like if installing from your own custom CD containing it's own $FG,2$/0000Boot/OldMBR.BIN.C$FG$ onto a system with a non-ZenithOS boot loader.
