MC_ALLOC
outw( MC_ALLOC | numPages, ioaddr + MMU_CMD );
outw( MC_ALLOC | 1, ioaddr + MMU_CMD );
outw(MC_ALLOC | num_pages, ioaddr + MMU_CMD);
SMC_SET_MMU_CMD(lp, MC_ALLOC | 1);
SMC_SET_MMU_CMD(lp, MC_ALLOC | numPages);