On Wed, Dec 19, 2001 at 10:34:37AM +0100, Geert Uytterhoeven wrote: > > > set_io_port_base(0xb4000000); > > > isa_slot_offset = 0xb0000000; > > > > I see. So isa_slot_offset is for isa_read/isa_write, although I still don't > > see what kind of drivers would use isa_read/isa_write. > > E.g. VGA and ISA NVRAM. Correct. And much much more, the whole PC insanity. There are plenty of MIPS systems that are essentially PCs with a MIPS CPU glued on so you get all the fun, ISA, EISA, VLB etc. Barf bag technology. Ralf