At power up, or full system reset, the microcode was loaded from the card reader.
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This usually relies on control from a complex control unit with built-in microcode.
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Another feature of the Alto was that it was microcode-programmable by users.
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This is essentially what microcode achieves when a hardware platform changes internally.
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Replication is enabled via microcode on the disk array controller or via serversoftware.
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Four revisions of the chip exist, each physically identical but with different microcode.
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The early Lisp Machines used microcode to provide the instruction set.
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For the Smalltalk-74 system, Dan Ingalls later implemented a redesigned version in microcode.
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This is very similar to the way CPUs with microcode execute one microinstruction per cycle.
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More examples
Firmware: (computer science) coded instructions that are stored permanently in read-only memory
Microcode is a layer of hardware-level instructions and/or data structures involved in the implementation of higher level machine code instructions in many computers and other processors; it resides in a special high-speed memory and translates machine instructions into sequences of detailed ...
The elementary computer instructions that correspond to an executable program instruction. [FIPS140] (see also computer, program, code, cryptographic module)
Extremely low-level logic which is typically used to translate between the binary instruction set of a microprocessor, such as an X86, and the underlying hardware implementation. Which would have nothing to do with DRM, except that in some cases such microcode can be maliciously hacked. ...
Microcode, also known as microprogram, refers to the instruction set of a CPU as a sequence of microcode instructions (microinstructions), each of which typically consists of a number of bit fields and the address of the next micro-instruction to execute. ...
Computer code which implements the machine language of a computer.