Mine

C3500XL Boot Loader (C3500-HBOOT-M) Version 12.0(5)XU, RELEASE SOFTWARE (fc1)
Compiled Mon 03-Apr-00 17:47 by swati
 starting...
Base ethernet MAC Address: 00:02:fd:83:8b:c0
Xmodem file system is available.
Initializing Flash...
flashfs[0]: Checking block 0...bad checksum (58096 != 12127)
flashfs[0]: erasing block 0...done.
flashfs[0]: sector 0, block 14 checksum (0xf523 != 0xe2f0)
flashfs[0]: sector 128, block 14 checksum (0x20b6 != 0xe2f0)
flashfs[0]: sector 128, block 15 checksum (0xf681 != 0xe2f0)
flashfs[0]: sector 129, block 15 checksum (0x5a87 != 0xe2f0)
flashfs[0]: sector 0, block 24 checksum (0x4378 != 0xe2f0)
flashfs[0]: sector 0, block 26 checksum (0xdbd8 != 0xe2f0)
flashfs[0]: inconsistent sector list, fileid 3, parent_fileid 0
flashfs[0]: 5 files, 1 directories
flashfs[0]: 0 orphaned files, 0 orphaned directories
flashfs[0]: Total bytes: 3612672
flashfs[0]: Bytes used: 6144
flashfs[0]: Bytes available: 3606528
flashfs[0]: flashfs fsck took 7 seconds.
...done Initializing Flash.
Boot Sector Filesystem (bs:) installed, fsid: 3
Parameter Block Filesystem (pb:) installed, fsid: 4
Loading "flash:c3500xl-c3h2s-mz.120-5.WC17.bin"...flash:c3500xl-c3h2s-mz.120-5.WC17.bin: short read: bad mzip file

Error loading "flash:c3500xl-c3h2s-mz.120-5.WC17.bin"

Interrupt within 5 seconds to abort boot process.
Boot process failed...

The system is unable to boot automatically.  The BOOT
environment variable needs to be set to a bootable
image.

switch: