EpromCtrl
set_register(pegasus, EpromCtrl, 0);
set_register(pegasus, EpromCtrl, EPROM_READ);
ret = get_registers(pegasus, EpromCtrl, 1, &tmp);
set_register(pegasus, EpromCtrl, 0);
set_register(pegasus, EpromCtrl, EPROM_WRITE);
ret = get_registers(pegasus, EpromCtrl, 1, &tmp);