Intel 915GM Compact Flash Power Select JP1, Lvds Voltage select JP2, COM1 Mode Select JP4

Connectors and Jumpers

Table 5. Compact Flash Power Select (JP1)

Option	JP1
3.3 V (default)	Short 1-2
5 V	Short 2-3

Table 6. LVDS Voltage select (JP2)

Option	JP2
3.3 V (default)	Short 1-2
5 V	Short 2-3

Table 7. COM1 Mode Select for RS-232/422/485 (JP3/JP6/JP7)

Option	JP3	JP6
RS232 (default)	Short 3-5, 4-6	Short 3-5, 4-6
RS422	Short 1-3, 2-4	Short 1-3, 2-4
RS485	Short 1-3, 2-4	Short 1-3, 2-4

JP7

Short 1-2

Short 3-4, 7-8

Short 5-6, 7-8

Table 8. COM1 Mode Select (JP4)

	Option	JP4
	Pin 1=DCD (default)	Short 3-5
	Pin 1=5 V	Short 1-3
	Pin 8=RI (default)	Short 4-6
	Pin 8=+12 V	Short 2-4
Table 9. COM2 Mode Select (JP5)
	Option	JP5
	Pin 1=DCD (default)	Short 3-5
	Pin 1=5 V	Short 1-3
	Pin 8=RI (default)	Short 4-6
	Pin 8=+12 V	Short 2-4
Table 10. CMOS Clear Jumper (JP8)
	Option	JP8
	Normal (default)	Short 1-2
	Clear CMOS	Short 2-3
Table 11. Audio Output Select Jumper (JP9)
	Option	JP8
	Line Out (default)	Short 1-3, 2-4
	Speaker Out	Short 3-5, 4-6