noun
microprogram
Technical computing term for a low-level program that directly controls a CPU's microarchitecture.
このCPUの命令セットはマイクロプログラムで実装されている。
This CPU's instruction set is implemented with a microprogram.
Firmware is higher-level software stored in non-volatile memory, while a microprogram is a lower-level sequence that directly controls hardware operations.
Loanword from English 'microprogram', combining 'micro-' (small) and 'program'.