The only place the boot code is shown right now is during the boot process. I believe there is some work being done to add a method of seeing the boot code, but right now the only method is through viewing the boot process. Be sure your terminal software is configured to save the session output. The firmware you are coming from is pretty old, You shouldn't have any issues running the update command. 
I am planning on upgrading a refurb PowerConnect 8132F switch I purchased which is currently at 5.1.0.1 to v6.5.2.5The upgrade instructions [URL] seem very clear and easy except for one item which seems to be missing or extremely unclear on the instructions for this latest version and the other few I checked out before I found this version.It states I need to make sure the switch isn't running with the older boot-code version and gives an odd looking number for what the current version is (U-Boot 2010.03.rc1 (Sep 04 2013 - 18:13:27)).What is missing is an example showing how I see what current the boot-code version is.The show version command does not show it. I had thought well maybe I could just run the 'update bootcode' command, but the instructions clearly state to PLEASE skip the step if the switch is already running with the latest boot-code version. So please can someone provide clear instructions for how I see what the current boot code version is on my switch?
Upgrade Dell PowerConnect 8132F to v6.5.2.5