Using 32-bit Registers in 16-bit Modes (x86)

This paper discusses use of 32-bit registers in real mode and 16-bit protected mode in an smx system running on a 386 processor or higher. It is necessary to use a compiler switch and enable a setting in smx before using 32-bit registers. The advantages and disadvantages of using this option are discussed, as well as how to enable it. Once enabled, the compiler will generate code that uses 32-bit registers when beneficial, and 32-bit registers can be used from assembly code. This option requires smx source code.

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