存储控制器，CPU控制单元中，负责容纳微进程的保存设备的一种。

存储控制器，多作为可在微处理器中排列二极管的只读存储器装机使用。其起源至少可以追溯到1947年旋风计算机所使用的"program timing matrix" 。IBM在早期的360系统中使用了ROM存储控制器，但在后继的370系统中，改用了既可从软盘导入微进程，又可随意读写的超高速随机存储器，这使得IBM可以轻松修改微进程中的进程错误。尽管当时默认的存储控制器为ROM，但由于可随意读写的RAM的面世，使得用户可以自己更改计算机的微进程。

A control store is the part of a CPU's control unit that stores the CPU's microprogram. It is usually accessed by a microsequencer. Early types of control store took the form of diode-arrays that were accessed via address decoders, but were then created using writable microcode that was stored in a form of read only memory called a writable control store. The outputs generally had to go through a register to prevent a race condition from occurring. The register was clocked by the clock signal of the system it was running on.