Questions tagged [protected-mode]

for questions about switching hardware into protected virtual address mode

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Are old Dos and Windows .com executable binaries real mode or protected mode?

Newer Windows and Dos binary executable files with the .exe extension have an MZ header in them and nowadays also a PE header. But before these there used to also be .com binary executable files and ...
7
votes
1answer
1k views

How do you put a 286 in Protected Mode?

From the Art of Intel x86 Assembly, Page 149, The 80386 added four control registers: CR0-CR3. These registers extend the msw registers of the 80286 [...] The book says earlier that, The 80286 ...
33
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3answers
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80286 can switch from real mode to protected mode - but why not back?

It's been a while, but I've read in a system programming book that you could switch your Intel 80286 CPU from the normal real mode to a more powerful protected mode. I clearly remember that they said ...