![]() ![]() V86 Mode allowed the CPU to run multiple instances of Real Mode where each program would be given access to up to 1MB of RAM for their own purposes without overwriting another program's data. Finally, the 386 CPU implemented a far more usable Protected Mode and a Virtual 8086 Mode (V86). Then the 286 CPU implemented a Protected Mode and allowed the CPU to address 16MB in that Mode, but few applications used it because DOS required Real Mode. ![]() Real Mode's main issue, other than it was limited to 1MB of RAM, was that multitasking was almost impossible to accomplish. In the beginning the Intel 80 CPUs only implemented, Real Mode, where a program had total control over all aspects of a system.
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