I know that this is a little off-topic, but here it goes. I'm reading the book "The Soul of a New Machine", a book about the development of DG's Eclipse minicomputers (great book, BTW). In there, they talk about a "microcoder," one who is responsible for developing the microcode for the processor. Inutitively I know what microcode is. I think of it as hard-coded ROM for the instruction fetch unit of the microprocessor. Since I haven't been formally schooled in computer science or microprocessor design, I'd like to understand (in 500 words or less <g>) how microcode works, i.e., how is it implemented and how does the microprocessor access it. I know that this is probably a topic that is worthy of volumes of paper, but the Reader's Digest version will do! Thanks. Rich Cini/WUGNET Charter ClubWin! Member MCP Windows 95/Windows Networking