记忆配类与保护选用
memory parity and piotect option
城市记忆保护
Protection of city memory
记忆保护特权指令
memory protect privileged instruction
记忆保护无作业
no operation， memory protect
memory protect
NO OPeration
逐页记忆保护
page-by-page memory protection
备用记忆电源
memory back-up power source
半导体器件保护用熔断体
fuse of semiconductor protection