This was posted on NANOG by someone (I cannot remember who).
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c2948g-4.sc5> sh ver
WS-C2948 Software, Version NmpSW: 5.5(2)
Copyright (c) 1995-2000 by Cisco Systems, Inc.
NMP S/W compiled on Jul 28 2000, 17:21:27
GSP S/W compiled on Jul 28 2000, 15:57:45
System Bootstrap Version: 4.4(1)
Hardware Version: 2.3 Model: WS-C2948 Serial #: JAB041808VK
Mod Port Model Serial # Versions
--- ---- ---------- -------------------- ---------------------------------
1 0 WS-X2948 JAB041808VK Hw : 2.3
Gsp: 5.5(2.0)
Nmp: 5.5(2)
2 50 WS-C2948G JAB041808VK Hw : 2.3
DRAM FLASH NVRAM
Module Total Used Free Total Used Free Total Used Free
------ ------- ------- ------- ------- ------- -------- ---- ----- -----
1 65536K 34318K 31218K 12288K 8583K 3705K 480K 93K 387K
Global checksum failed.
Uptime is 2333 days, 13 hours, 33 minutes
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thats 6 years 142 days.
Global checksum failed indeed.