It looks like you have the Omnimon 8k ( https://archive.org/details/NewellIndustries8KOmnimonManual ) Upper and lower will be mostly similar but certain commands are only available in one bank or the other.
To see if you have Omniview set the switches to Newell, ON, View, and boot into basic type X=USR(49152) and you should get 80 columns.