BTX issues when booting from a USB CD-ROM

[Bruce M. Simpson]

Peter Losher wrote:
> In both cases, once the USB CD-ROM started loading either 6.1 or 6.2, I
> get a BTX halt:
>   
Known issue. The btx code can't deal with BIOSes which want to enter 
protected mode to service the I/Os. USB support in most BIOSen generally 
does this. I see the same issue with FreeBSD's pxeboot and the PXE 
client in Etherboot.

Regards,
BMS