The author writes, "It is first of all intended to be used as a 'custom external 128 rom' with an UII(+) cartridge, but should work at least in the external rom slot of a 1750 reu. Didn't check if it works in the internal slot, it doesn't require an UII, through gets more functionality with one."
I have the ROM selected, and it sees the 1571 on boot, no problem. But does the ROM have any configuration screens? And if yes, how can I access them? Because now I see no added value of using this.
If you have the current (as of this writing) 1.08 version, it will let you configure some things from the startup screen, but, this rom is only really usefull if you at least have multiple drives, and offers more when you have an Ultimate II. If you do, enable its first drive, and have both your 1571 and the drive of the UII configured at id 8, and you'll see why it can be usefull, especially for C128D users.