Getac B300 User Manual page 107

When set at Enhanced and connecting a SATA hard drive is set as
Primary on SATA controller in Native mode. When connecting a PATA
hard drive is set as Primary on PATA controller in Legacy mode.
AHCI Configuration enables support for AHCI (Advanced Host
Controller Interface) Native command queuing and Link Power
Management. Requires Windows XP Service Pack 1 + IAA driver or
newer operating system. This item will not appear if the above item
"SATA HDD Mode" is set at Compatible.
Serial Port COM1 when enabled the serial port COM1 is configured at
3F8h, IRQ4.
Serial Port COM2 when enabled the serial port COM2 is configured at
2F8h, IRQ3.
Using BIOS Setup 5-8