No ACPI == No floppy

So having disabled ACPI, I've suddenly discovered that there is no floppy device. I'm attempting to upgrade the BIOS on my Promise Ultra133 to see if I can stop the corruption. A quick google finds this bug.

The workaround?
Add:
name="fdc" parent="isa"
dma-channels=2
interrupts=6
reg=1,0x3f0,6,1,0x3f7,1;
(you need that semicolon)

To:
/platform/i86pc/kernel/drv/fdc.conf

*sigh*

ACPI horrors

Probably as a result of the old motherboard: Disabling ACPI seems to stop OpenSolaris crashing (with my recompiled kernel) when ls'ing /dev. This is done by adding acpi-user-options=2 to the boot environment variables. Attempted to force UDMA 5. dmesg still pops up Multiword DMA at various points, but no longer complains about ACPI.