吉他指法视频教程:IBM 300GL电脑重装系统

我的电脑是IBM 300GL,现在需要重装系统,只是在CMOS中无法设置从光驱启动,所以一直没能重装系统,我知道一般的电脑的设置是在进入CMOS面板后,在Advanced BIOS Features目录下的First boot device、Scend boot device、Third boot device中设置，但是我所用的电脑型号比较早，CMOS面板并没有这样的目录，所以我也就不知道怎么修改了，现在我将我的这个电脑的CMOS面板的目录列出来，望各位大侠指点，谢谢！
Configuration/Setup Utility
Select Option

System Summary
Product Data
Devices and I/O Ports
Start Options
Date and Time
System security
Advanced Setup
ISA Legacy Resources
Power Management

Save Settings
Restore Settings
Load Default Settings

我认为最有可能在Start Options中，现将该子目录列表如下：

Keyboard NumLock State [On /Off]
Keyboard Speed [Fast/Normal]
Disketteless Operation [Disabled/Enabled]
Keyboardless Operation Mode [Disabled/Enabled]
Power On Self Test [Quick/Enhanced]
Power On Logos [Disabled/Enabled]
Option Keys Display [Disabled/Enabled]
Network boot F12 Option [Disabled/Enabled]
Power On Status [Disabled/Enabled]
Virus Detection [Disabled/Enabled]