MEMORY_ON
| (dev->mem_start ? MEMORY_ON : 0) /* turn memory on */
retval |= MEMORY_ON; /* we need memory enabled to use DMA. */
writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
writereg(dev, PP_BusCTL, MEMORY_ON);
writereg_io(dev, PP_BusCTL, MEMORY_ON);