As Jim said, one single bank of 128 channels.
Reference section 3 at http://www.miklor.com/uv5r/FAQ

John

From: chirp_users-bounces@intrepid.danplanet.com [mailto:chirp_users-bounces@intrepid.danplanet.com] On Behalf Of Jeff Lenkowski
Sent: Tuesday, June 23, 2015 8:08 PM
To: chirp_users@intrepid.danplanet.com
Subject: [chirp_users] BF-F8HP Programming "B" Channels

I just got the radio and finally got CHIRP working on my Mac (drivers for cable – duh)… I’m trying to figure out how to program the A level and B level with different frequencies, but after reaching the end of the Internet via Google looking for the answer, I’m completely stumped. 

Could someone please let me know where in CHIRP the setting is located??

Thanks in advance!!