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/* Microcode */
To execute a machine instruction, the computer internally executes several simpler micro-instructions, specified by the microcode. In other words, microcode forms another layer between the machine instructions and the hardware.
The actual internal representation is a combination of "microcode" and "nanocode". The 68000 has 544 17-bit microcode words which dispaches to 366 68-bit nanocode words. [https://stackoverflow.com/a/19045414 Source1Source] The microcode is a series of pointers into assorted microsubroutines in the nanocode. The nanocode performs the actual routing and selecting of registers and functions, and directs results. Decoding of an instruction's op code generates starting addresses in the microcode for the type of operation and the addressing mode. [httpshttp://newswww.ycombinatoreasy68k.com/item?id=35141320 Source2paulrsm/doc/dpbm68k1.htm Source]
== Hybrid 16/32‑Bit Design ==