PP_BusCTL
writereg(dev, PP_BusCTL, (ENABLE_IRQ
writereg(dev, PP_BusCTL, 0);
writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL) | ENABLE_IRQ);
writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
writereg(dev, PP_BusCTL, 0); /* disable interrupts. */
writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ);
writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
writereg(dev, PP_BusCTL, MEMORY_ON);
writereg_io(dev, PP_BusCTL, MEMORY_ON);
writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL) & ~ENABLE_IRQ);
writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL) | ENABLE_IRQ);
writereg(dev, PP_BusCTL, 0);