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16-bit protected mode is still used for running legacy applications, eg. DPM compatible DOS extender programs (through virtual DOS machines) or Windows 3.x applications (through the Windows on Windows subsystem) and certain classes of device drivers in OS/2 2.0 and later, all under control of a 32-bit kernel.
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Real mode operates using a bit path and protected mode uses a bit data path?
Real mode uses 16 bit data path while protected mode uses 32 bit data path.
Real mode allows programs direct access to but protected mode does not?
i finnally freackin found it, real mode(16 bit) allows access to all hardware resources, where protected mode(32 bit) controls how the application accesses the hardware. In real-mode, an application has complete access to all hardware resources. This "open door" policy can create problems when applications make conflicting commands to the hardware. In protected mode and long mode, the OS controls how an application can access hardware.page 53 in CompTIA A+ Guide to Managing & Maintaining Your PC, Sixth Edition by Jean Andrews
Is a 16-bit real mode program that queries the computer for time and date and surveys hardware?
ntdetect.com
What are the computer requirement for real time processing?
Any computer is capable of processing in realtime. If you mean Realtime Mode, a DOS operating system mode and processor mode, then it requires any version of DOS 1.0 or later, and an x86 based computer (with coprocessor in the case of an 8086, 286, and 386) with a processor capable of addressing at least 8 bits of memory space (256 bytes), preferably a 16-bit address space (64 KB) and up to 640 KB address space. In order to utilize more than 640 KB of memory, you will need to operate in Protected Mode, which requires a 286 or greater, preferably a 386 or better. The 486 was the first processor which made extensive standard use of Protected Mode in DOS, to utilize for games and operating systems (such as Windows 3 and Windows 95)
What does DPMS mean?
Either "Dos Protected Mode Services" or "display power management signaling".
CPU's operate in 3 modes 16 bit 32 bit and 64 bit Respectively the 3 modes are also called?
real mode, protected mode and long mode real mode, protected mode and long mode Or: 16-bit modes (real, protected or virtual), 32-bit mode (protected), 64-bit modes
Can you have 16-bit protected mode on a driver?
yes
Real mode operates using a bit path and protected mode uses a bit data path?
Real mode uses 16 bit data path while protected mode uses 32 bit data path.
Protect mode is also known as 16-bit mode?
no. protected mode runs the software in a "sand box" where nothing should be able to go wrong. 16-bit mode runs the program using 16-bit instead of 32-bit, for compatability.
What are the two modes of operation of the CPU?
processor contain three modes. 1.Real mode -When PC in DOS programing. 2.Protected Mode -When PC operating system mode 3.virtual mode real mode - when PC in protected and real mode conmmenly.
What is size of far pointer?
In real mode far pointers are 32 bit long (segment + offset) In protected mode 48 bit (16 bit segment + 32 bit offset) (In 64-bit mode 80 bit (16 nit segment + 64 bit offset) but it's not so useful)
What is the size of far pointer?
In real mode far pointers are 32 bit long (segment + offset) In protected mode 48 bit (16 bit segment + 32 bit offset) (In 64-bit mode 80 bit (16 nit segment + 64 bit offset) but it's not so useful)
Real mode operates using an -bit data path and protected mode uses an -bit data path?
Real mode -16bit Protected mode -32bit
How do you switch from real mode to protected mode in 80386?
To switch from real mode to protected mode in the 80386, set the PE bit in the MSW in CR0, and then immediately execute a JMP to flush the prefetch queue.
What is the difference between CPU working in real mode and protected mode?
In real mode, the effective memory address is the same as the linear, or physical, memory address. The segment register operates by specifying the base of a 64kb region of memory, each region overlapping the other by 16 bytes. In protected mode, the effective address is translated by the page table which provides a larger region size and more memory addressibility. The segment register, a/k/a selector, selects the particular page table to use.
Real mode allows programs direct access to but protected mode does not?
i finnally freackin found it, real mode(16 bit) allows access to all hardware resources, where protected mode(32 bit) controls how the application accesses the hardware. In real-mode, an application has complete access to all hardware resources. This "open door" policy can create problems when applications make conflicting commands to the hardware. In protected mode and long mode, the OS controls how an application can access hardware.page 53 in CompTIA A+ Guide to Managing & Maintaining Your PC, Sixth Edition by Jean Andrews
Which addressing mode is the best?
On Intel CPUs which support IA-32 , the best is Protected Mode. But as for Intel CPUs supporting IA-32e ,the best is 64-bit Mode.
