System Bootstrap, Version 12.3(8r)YI4, RELEASE SOFTWARE
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Copyright (c) 2006 by cisco Systems, Inc.

C870 series (Board ID: 1-148) platform with 131072 Kbytes of main memory

Booting flash:/c870-advipservicesk9-mz[1].124-15.T1.bin

Error : compressed image checksum is incorrect 0x764D5C68
Expected a checksum of 0x234D5C67

*** System received a Software forced crash ***
signal= 0x17, code= 0x5, context= 0x0
PC = 0x0, Vector = 0x0, SP = 0x0