I don't think it can be used as an accelerator (there's a 1mhz 'proof of concept', but that's it). The card seems to have impressive capabilities, but looking at the list of projects you can turn it into an expensive sound card, ram expansion....that's about it from a practical standpoint.
While it should be possible to make an Accelerator out of the Carte Blanche II, no one has, ( yet ).. Run #01 shipped with a 14MHz 65816 chip, and if the ASIC Logic of the Zip Chip was implemented on the FPGA, it should be very possibly to make an Accelerator.
I would have thought an accellerator or video output card would have been done by now, but apparently not. I'm interested but don't see any good uses for this thing, considering how little has been done with it after all these years. maybe I'm looking int he worng place.
VGA and HDMI were available when in originally shipped in JUL-2015..
I ordered my Unit with Option #4 ( out of 4 ):
4. IIe VGA video card + Apple speaker circuit + Mockingboard + 1Mhz 65C816 replacement processor (motherboard processor disabled and replaced with CBII's 65C816).