I’m trying to boot a “pascal formatted” disk on my #appleii. I insert the disk, turn the machine on, it reads from disk, clears the screen and then starts beeping. It doesn’t stop until i turn the machine off. Same behavior with pascal formatted images in the #FloppyEmu.

Where should I start investigating? The disks/images?
The disk controller card?
The drive and floppy emu?
Something else?