How to enter the pure DOS system and set the CD-ROM boot

The first part: boot into the DOS with a floppy disk
First, set the floppy drive as the first boot disk.
When the computer just started up, the following
press the "DEL" or "Delete" key does not let go,
enters the system basic input and output CMOS settings, press "ld" or down ” arrow keys to select “Advanced BIOS Features” items.
Then press “Enter” Enter to enter the “Advanced BIOS Features” setting,
The “First Boot Device” item here is to set the first boot item, “Second Boot Device”. The item is to set the second boot disk item, and the “Third Boot Device” item is to set the third boot disk item. Here we set the “First Boot Device” item to “Floppy”, which is the floppy disk, and the “Second Boot Device” item is set to “HDD-0”” is the default hard disk. Setting method: Select “First Boot Device” item press “Enter”Enter key
(Floppy--floppy disk, HDD-0--hard disk, CDROM--disc) above and then press “ Next, & rdquo; arrow keys, select the "Floppy" option, and then press the "Enter" key to complete the setting and return to Figure 4, you can see that the setting has been changed. In the same way, set the “Second Boot Device” item to “HDD-0””. After the setting is completed, press the “Esc” button to exit to the (Fig. 1) screen, and then press the “Right and Down” button to select the “Save & Exit Setup” item. The meaning of this item (save settings and exit)< Br>Select “Save & Exit Setup” and press “Enter”Enter key
Press “Y” key to enter, the system will save the recognition and restart. Up to here, the system's first boot disk item is set. After you enter the 98 or Me boot disk to the floppy disk drive (A disk), you can boot to the DOS system without booting. It is recommended that after installing the system, if you do not need to frequently go to the DOS system, set the first boot entry to “HDD-0”. The process of starting is described below.