Yup. Standard cranks and spider. You can mix Biopace and standard round rings too, although some combos work well and others don't. It can be tricky to adjust the front derailleur to get reliable shifts without dropping the chain.

It's easy to return the Biopace double to the default configuration -- the locator pin is intended to go one way. However you can reorient/index the oblong chainrings however you like, within the limits of the five available positions. I found some alternate orientations I liked, while others felt weird. Eventually I returned the Biopace 52/42 rings to the default position. Suited me well when I used 'em a couple of years ago.

FWIW, subjectively speaking, the 42T small Biopace ring felt "smaller" to me, more like a 39T. On climbs it didn't feel like mashing with a 42T standard round ring.

I also preferred shorter cranks with Biopace. Usually I'm not picky about crank length. I ride 170, 172.5 and 175. But longer cranks felt weird to me with Biopace, very herky-jerky. Switching to 170 cranks resolved that issue and my cadence felt "right" again.

It's very subjective but I liked Biopace when I used it for a year in 2019. Only reason I'm not using it at the moment is I disassembled that bike to rebuild it and still haven't finished the rebuild. I plan to switch that bike ('93 Trek 5900) to Dura Ace cranks, 53/39 to match the Ultegra 53/39 cranks on my 2014 Diamondback Podium. But I might swap the Biopace over to my Ironman, with 170 cranks.