In Daystar's forum on CompuServe, there is information that a ROM upgrade is needed for their 68040-base card. There is a small charge for the replacement, you need to contact Daystar. The Tech Info Library article titled "Locating Vendor Information" can help you search for a particular vendor's address and phone number.
Daystar's 68030-based cards do not need to be upgraded.
The ROM upgrade comes as a field upgrade, meaning the end user is responsible for the installation. For those who don't mind opening their Macintosh, removing cards, and then replacing a chip it's pretty easy. Daystar provides you with a chip removing tool and a grounding strap. On the Turbo 040 card, the ROM chip is the only one that is socketed, the rest of the chips are soldered. In addition to the instructions and the pictures, it would be extremely difficult to get the wrong chip.
Support Information Services