vme1_reg_read
reg = vme1_reg_read(sc, VME1REG_SCON) & ~VME1_SCON_SYSFAIL;
reg = vme1_reg_read(sc, VME1REG_SLADDRMOD);
vme1_reg_read(sc, VME1REG_IRQEN) | VME1_IRQ_VME(level));
vme1_reg_read(sc, VME1REG_IRQEN) & ~VME1_IRQ_VME(level));