- Pentium 4 Full Size PICMG CPU Card User's Manual

INSTALLATIONS
IB810 User’s Manual 11
Configuring the CPU Frequency
The IB810 CPU card does not provide DIP switches to configure the
processor speed (CPU frequency). However, the processor speed can be
automatically detected by the system.
JP1: DiskOnChip Address Select
JP1 Address
D0000-D7FFF
D8000-DFFFF (default)
JP2, JP3, JP4: RS232/422/485 (COM2) Selection
COM1 is fixed for RS-232 use only.
COM2 is selectable for RS232, RS-422 and RS-485.
The following table describes the jumper settings for COM2 selection.
COM2
Function
RS-232 RS-422 RS-485
Jumper
Setting
(pin closed)
JP2:
1-2
JP3:
3-5 & 4-6
JP4:
3-5 & 4-6
JP2:
3-4
JP3:
1-3 & 2-4
JP4:
1-3 & 2-4
JP2:
5-6
JP3:
1-3 & 2-4
JP4:
1-3 & 2-4