There's a PDF of the manual here:
http://cachepe.*******.com/media/DR_...b0d97c36f9.pdf
In case you lose that link in the future, just type this into google: "roland dr 880 filetype

df"
(Google will also show it as html, in case you hate pdfs as much as I do.)
I haven't bothered to learn to program mine, I just use the presets, or else drive it via MIDI.
Edit: Oh, ****, I mean Oh, **** , I mean, Oh fiddlesticks. the forum software has ****, er, *** , er, ******, er ****
***** 8 ***** * * * *
<sigh>
The forum software has **** *** * * **** * * * * * * my post. I guess you'll have to use google.