i386's biosboot failing on VAIO PCG-C1X

[Alexander Guy <a7r_(_at_)_andern_(_dot_)_org>]

Greetings,
    I'm trying to get OpenBSD 2.7 booting on a VAIO PCG-C1X.  At present
FreeBSD's BTX and LILO both work on this machine, but biosboot has problems. 
Here's a by-hand paste of biosboot's output after I rebuilt -current's
``src/sys/arch/i386/stand'' w/ DEBUG and BIOS_DEBUG enabled:

	boot> 
	booting fd0a:/bsd.old: devopen: BIOS: fd0a:/bsd.old
	BIOS geometry: heads=2, s/t=18; EDD=-1
	loading disklabel @ 1
	biosd_io(reading, f000ff53,0,0,1,1,0xf9ac)
	 (0,0,1,1)@0xf9ac
	BIOS error 0x20101 ()

	BIOS error 0x20101 ()

	BIOS error 0x20101 ()

	BIOS error 0x20101 ()

	BIOS error 0x20101 ()
	=0x20101()
	failed to read disklabel
	87
	 failed(87). will try /bsd
	boot>

The floppy drive I'm booting off of is a USB device, w/ BIOS emulation enabled.
As stated, the machine is a Sony PCG-C1X ``PictureBook'', w/ 64 MB of RAM, and
a Pentium 266 (IIRC).  Anyone have any ideas?  Thanks.


Alexander