cfg_regs_t
cfg_regs_t prrd = 0;
cfg_regs_t cor; /* Configuration Option Register */
cfg_regs_t ccsr; /* Configuration and Status Register */
cfg_regs_t prr; /* Pin Replacement Register */
cfg_regs_t scr; /* Socket and Copy Register */
cfg_regs_t exstat; /* Extended Status Register */
cfg_regs_t iobase0; /* IO Base 0 Register */
cfg_regs_t iobase1; /* IO Base 1 Register */
cfg_regs_t iobase2; /* IO Base 2 Register */
cfg_regs_t iobase3; /* IO Base 3 Register */
cfg_regs_t iolimit; /* IO Limit Register */