isa_virt_to_bus
#define fd_set_dma_addr(addr) set_dma_addr(FLOPPY_DMA,isa_virt_to_bus(addr))
#define isa_virt_to_bus isa_virt_to_bus
isa_virt_to_bus(addr) >= 0x1000000 ||
set_dma_addr(FLOPPY_DMA, isa_virt_to_bus(addr));