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:{{tq|Since microcode can be updated}} ''Some'' microcode can be easily updated. Other microcode cannot be easily updated, such as the microcode in the [[IBM System/360 Model 30]], [[IBM System/360 Model 40]], and [[IBM System/360 Model 50]], which use capacitor read-only storage, [[transformer read-only storage]], (balanced) capacitor read-only storage, respectively; it may be possible to replace that ROM, or (in the case of the capacitor ROM) remove a component and replace it, but it can't be electronically updated, only manually updated. Other processors may have had microcode in on-chip ROM in a single-chip CPU, which can be replaced only by replacing the entire CPU.
:{{tq|is it actually stored in ROM?}} Yes on some systems, no on others. [[User:Guy Harris|Guy Harris]] ([[User talk:Guy Harris|talk]]) 18:01, 26 September 2024 (UTC)
::Fixed in [https://en.wikipedia.org/w/index.php?title=Microcode&diff=1247933799&oldid=1247898843 this edit]; I just spoke of the memory holding the microcode (which could be ROM, EEPROM, RAM, or secondary storage from which the microcode is loaded into RAM). [[User:Guy Harris|Guy Harris]] ([[User talk:Guy Harris|talk]]) 20:17, 26 September 2024 (UTC)
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