can't boot kern.flp on thinkpad 750

[Andy Greenwood]

I'm trying to install 4.11 on an old IBM Thinkpad 750, but can't get
the kern.flp disk to boot. I know that the floppy drive on this
machine isn't exactly standard (it's a 2.88M drive, if that makes a
difference), but I'm not sure what the differences are. In any case,
when it tries to load the kernel from the floppy, I get this output..

Disk error 0x4 (lba=0x38)

>> FreeBSD/i386 BOOT
Default: 0:fd(0,a)/boot/loader
boot:

I've tried googling this, but can't seem to come up with anything. If
anyone has any pointers, I'd appreciate it.