here is my sh ver from my cisco 2620 router.
Cisco Internetwork Operating System Software
IOS (tm) C2600 Software (C2600-IS-M), Version 12.1(5)T10, RELEASE SOFTWARE (fc2
TAC Support: http://www.cisco.com/tac
Copyright (c) 1986-2001 by cisco Systems, Inc.
Compiled Wed 08-Aug-01 08:52 by ccai
Image text-base: 0x80008088, data-base: 0x8101AD48
ROM: System Bootstrap, Version 12.1(3r)T2, RELEASE SOFTWARE (fc1)
MORRIS_PLAINS uptime is 5 days, 19 hours, 0 minutes
System returned to ROM by error - a SegV exception, PC 0x8079D7C8
System image file is "flash:c2600-is-mz.121-5.T10.bin"
cisco 2620 (MPC860) processor (revision 0x600) with 36864K/4096K bytes of memory
Processor board ID JAD05390H9D (3805878765)
M860 processor: part number 0, mask 49
X.25 software, Version 3.0.0.
Basic Rate ISDN software, Version 1.1.
1 FastEthernet/IEEE 802.3 interface(s)
1 Serial network interface(s)
1 ISDN Basic Rate interface(s)
32K bytes of non-volatile configuration memory.
16384K bytes of processor board System flash (Read/Write)
Configuration register is 0x2102
my question is, does cisco have a tool to show me what IOS i can upgrade my router to? can i upgrade to the 12.4? or not? or what is the highest i can updgrade to and how much flash and ram will i need?