Cisco WAN :: 1861 - Router Is Going To Roman Mode

My Router is showing like this can any one explain me what it is and why its showing like this and every time its going to Roman mode some times going to Normal mode how to trouble shoot this problem, is the problem is flash or some thing else explain me and why its showing like this (Read only Roman initialized)
The output is shown like this
 
System Bootstrap, Version 12.4(11r)XW3, RELEASE SOFTWARE (fc1)
Technical Support: { URL} 
C1860 series platform with 262144 K bytes of main memory
 
Read only Roman initialized
program load complete, entry point: 0x80015000, size: 0xb700
program load complete, entry point: 0x80015000, size: 0xb700
 [ code]....
 
If any of the above Memory Requirements are
"UNKNOWN", you may be using an unsupported
configuration or there is a software problem and
system operation may be compromised.
Rounded IOMEM up to: 7Mb.
 
adjusted iome size up to minimum size of: 0X00C00000
Using 4 percent iomem. [12Mb/256Mb]
Bad FIO_0 EC220 vendor device id 0xFFFFFFFF
             
04:34:37 UTC Sat Apr 7 2012: Unexpected exception to CPU: vector 200, PC = 0x80444C24, LR = 0x80444C08
 
-Traceback= 0x80444C24 0x80444C08 0x80439DA0 0x80437BE0 0x800379F8 0x825B289C 0x810F8858 0x810F8B4C 0x80227A6C 0x8022A36C
 
CPU Register Context:
MSR = 0x00049030  CR  = 0x22008084  CTR = 0x00000000  XER   = 0x20000000
R0  = 0x00000000  R1  = 0x84CAE0C0  R2  = 0xFFF5FFF5  R3    = 0x00001388
R4  = 0x00000000  R5  = 0x84FAE234  R6  = 0x00000F9F  R7    = 0x001312D0
[code]....