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It's a Cisco 3620 router with 16M*4 DRAM,16MB+8MB Flash SIMM

Boot:
PCMCIA Slot1: No Card Present

System Bootstrap, Version 11.1(20)AA2, EARLY DEPLOYMENT RELEASE
SOFTWARE (fc1)
Copyright (c) 1999 by cisco Systems, Inc.
C3600 processor with 65536 Kbytes of main memory
Main memory is configured to 32 bit mode with parity disabled

device does not contain a valid magic number
boot: cannot open "flash:"
boot: cannot determine first file name on device "flash:"

System Bootstrap, Version 11.1(20)AA2, EARLY DEPLOYMENT RELEASE
SOFTWARE (fc1)
Copyright (c) 1999 by cisco Systems, Inc.
C3600 processor with 65536 Kbytes of main memory
Main memory is configured to 32 bit mode with parity disabled

rommon 1 > xmodem -c c3620-ik9o3s6-mz.123-26.bin
Do not start the sending program yet...
device does not contain a valid magic number
dir: cannot open device "flash:"

WARNING: All existing data in flash will be lost!
Invoke this application only for disaster recovery.
Do you wish to continue? y/n [n]: y
Ready to receive file c3620-ik9o3s6-mz.123-26.bin ...
C




after transfer is complete,nothing shows up so I restart the router





System Bootstrap, Version 11.1(20)AA2, EARLY DEPLOYMENT RELEASE
SOFTWARE (fc1)
Copyright (c) 1999 by cisco Systems, Inc.
C3600 processor with 65536 Kbytes of main memory
Main memory is configured to 32 bit mode with parity disabled

device does not contain a valid magic number
boot: cannot open "flash:"
boot: cannot determine first file name on device "flash:"

(previous xmodem doesn't work out)

System Bootstrap, Version 11.1(20)AA2, EARLY DEPLOYMENT RELEASE
SOFTWARE (fc1)
Copyright (c) 1999 by cisco Systems, Inc.
C3600 processor with 65536 Kbytes of main memory
Main memory is configured to 32 bit mode with parity disabled

PCMCIA Slot0: No Card Present

System Bootstrap, Version 11.1(20)AA2, EARLY DEPLOYMENT RELEASE
SOFTWARE (fc1)
Copyright (c) 1999 by cisco Systems, Inc.
C3600 processor with 65536 Kbytes of main memory
Main memory is configured to 32 bit mode with parity disabled

PCMCIA Slot1: No Card Present

System Bootstrap, Version 11.1(20)AA2, EARLY DEPLOYMENT RELEASE
SOFTWARE (fc1)
Copyright (c) 1999 by cisco Systems, Inc.
C3600 processor with 65536 Kbytes of main memory
Main memory is configured to 32 bit mode with parity disabled

device does not contain a valid magic number
boot: cannot open "flash:"
boot: cannot determine first file name on device "flash:"

System Bootstrap, Version 11.1(20)AA2, EARLY DEPLOYMENT RELEASE
SOFTWARE (fc1)
Copyright (c) 1999 by cisco Systems, Inc.
C3600 processor with 65536 Kbytes of main memory
Main memory is configured to 32 bit mode with parity disabled

rommon 2 > xmodem -c c3620-ik9o3s7-mz.123-22.bin
Do not start the sending program yet...
device does not contain a valid magic number
dir: cannot open device "flash:"

WARNING: All existing data in flash will be lost!
Invoke this application only for disaster recovery.
Do you wish to continue? y/n [n]: y
Ready to receive file c3620-ik9o3s7-mz.123-22.bin ...
Erasing flash at 0x317c0000
program flash location 0x30310000


then stuck here ,I restart it










System Bootstrap, Version 11.1(20)AA2, EARLY DEPLOYMENT RELEASE
SOFTWARE (fc1)
Copyright (c) 1999 by cisco Systems, Inc.
C3600 processor with 65536 Kbytes of main memory
Main memory is configured to 32 bit mode with parity disabled

boot: cannot determine first file name on device "flash:"

System Bootstrap, Version 11.1(20)AA2, EARLY DEPLOYMENT RELEASE
SOFTWARE (fc1)
Copyright (c) 1999 by cisco Systems, Inc.
C3600 processor with 65536 Kbytes of main memory
Main memory is configured to 32 bit mode with parity disabled

PCMCIA Slot0: No Card Present

System Bootstrap, Version 11.1(20)AA2, EARLY DEPLOYMENT RELEASE
SOFTWARE (fc1)
Copyright (c) 1999 by cisco Systems, Inc.
C3600 processor with 65536 Kbytes of main memory
Main memory is configured to 32 bit mode with parity disabled

PCMCIA Slot1: No Card Present

System Bootstrap, Version 11.1(20)AA2, EARLY DEPLOYMENT RELEASE
SOFTWARE (fc1)
Copyright (c) 1999 by cisco Systems, Inc.
C3600 processor with 65536 Kbytes of main memory
Main memory is configured to 32 bit mode with parity disabled

boot: cannot determine first file name on device "flash:"

System Bootstrap, Version 11.1(20)AA2, EARLY DEPLOYMENT RELEASE
SOFTWARE (fc1)
Copyright (c) 1999 by cisco Systems, Inc.
C3600 processor with 65536 Kbytes of main memory
Main memory is configured to 32 bit mode with parity disabled


rommon 2 > dir flash:
File size Checksum File name
15120140 bytes (0xe6b70c) 0x7f2e c3620-ik9o3s7-mz.123-22.bin
(bad checksu
m: 0x5bd5)




c3620-ik9o3s6-mz.123-26.bin is 16.3MB and c3620-ik9o3s7-mz.123-22.bin
is 14.4MB ,and I have one 8MB and one 16MB Flash SIMM installed.Will
it work this way?or something else is wrong?



my last try with only one 16MB SIMM,still stuck after transferring
rommon 2 > xmodem -c c3620-ik9o3s7-mz.123-22.bin
Do not start the sending program yet...
File size Checksum File name
15120140 bytes (0xe6b70c) 0x7f2e c3620-ik9o3s7-mz.123-22.bin
(bad checksu
m: 0x5bd5)

WARNING: All existing data in flash will be lost!
Invoke this application only for disaster recovery.
Do you wish to continue? y/n [n]: y
Ready to receive file c3620-ik9o3s7-mz.123-22.bin ...
Erasing flash at 0x30fc0000
program flash location 0x30660000

stuck

Thanks