MK48T18_CLKOFF
ocsr = mkclock_isa_nvrd(sc, MK48T18_CLKOFF + MK48TXX_ICSR);
mkclock_isa_nvwr(sc, MK48T18_CLKOFF + MK48TXX_ICSR, csr);
if (mkclock_isa_nvrd(sc, MK48T18_CLKOFF + MK48TXX_ICSR) != csr)
t1 = bcdtobin(mkclock_isa_nvrd(sc, MK48T18_CLKOFF + MK48TXX_ISEC));
mkclock_isa_nvwr(sc, MK48T18_CLKOFF + MK48TXX_ICSR, ocsr);
mkclock_isa_nvwr(sc, MK48T18_CLKOFF + MK48TXX_ICSR, csr);
t2 = bcdtobin(mkclock_isa_nvrd(sc, MK48T18_CLKOFF + MK48TXX_ISEC));
mkclock_isa_nvwr(sc, MK48T18_CLKOFF + MK48TXX_ICSR, ocsr);
{ "mk48t18", MK48T18_CLKSZ, MK48T18_CLKOFF, 0 },