
6
Introduction to the
Motorola 6800
The Motorola 6800 is one of the most widely used microprocessors in
industry, and will serve as the main example of machine architecture.
The general principles are applicable to most other devices, and a com-
parison of the detailed features of the 6800 and one of its competing
microprocessors is given in Chapter 10.
Motorola 6800 architecture
The Motorola 6800 microprocessor is available in several variants,
which differ in speed and in the amount of on-board storage carried.
From the programmer's point of view, all the types are identical, and
the physical differences will not be considered here. Figure ...