The Atlas probably can be programmed, and I believe that your receiver is the same as a RX-V650, so the code you mentioned will work, and so will another pair.

But let's find out if you have a programmable Atlas. Use the 983 command to blink back the remote signature.  The 1056B01 will probably blink back 3033, while the B03 will probably blink back 2010.9