I don't have a manual or remote to mine.
The closest manual that is still in the same series is the DSP-A2070:
http://www2.yamaha.co.jp/manual/pdf/av/english/am/DSP-A2070.pdf
Obviously, the manual will have some features and specifications that differ from the A1000.
I use a Harmony 550 to control mine. Codes work for the most part, the volume and input selectors are motorized.
You can get the input selector to move when you power it on. Shut off the A1000, move the input selector to a position between two inputs, and turn it back on. It'll freak out, and go clockwise and counterclockwise.
The volume control will not do that, you need the remote.