The real-address mode of the 80386 executes object code designed for execution on 8086, 8088, 80186, or 80188 processors, or for execution in the real-address mode of an 80286:
In effect, the architecture of the 80386 in this mode is almost identical to that of the 8086, 8088, 80186, and 80188. To a programmer, an 80386 in real-address mode appears as a high-speed 8086 with extensions to the instruction set and registers. The principal features of this architecture are defined in Chapters 2 and 3.
This chapter discusses certain additional topics that complete the system programmer's view of the 80386 in real-address mode:
14.1 Physical Address Formation
14.2 Registers and Instructions
14.3 Interrupt and Exception Handling
14.4 Entering and Leaving Real-Address Mode
14.5 Switching Back to Real-Address Mode
14.6 Real-Address Mode Exceptions
14.7 Differences From 8086
14.8 Differences From 80286 Real-Address Mode
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