Answer the following questions regarding 80386 Protected Mode descriptors and physical address calculations:
1. Construct the 8-byte segment descriptors in the format 'dd lower_dword, upper_dword' assuming A=0, P=1, G=0, AVL=1, r=0:
i. 32-bit, non-conforming, execute-only code segment at level 2 with Base = 0x00403333 and Limit = 0x0FFFF.
ii. 32-bit, Read-only data segment at level 0 with Base = 0x00A0BBBB and Limit = 0x1CCCC.
2. Calculate the 32-bit physical addresses where Base = 0x00A00000, Limit = 0x30000, EBX = 0x00001000, and ESI = 0x00003000:
i. [bx+si]
ii. [ebx+esi-0x0012FD]
Ch 15: 32-Bit Protected Mode Architecture
Covers transitioning from 16-bit real mode to 32-bit protected mode, setting the PE bit in CR0, constructing 8-byte segment descriptors (base, limit, access rights), and hardware memory protection rings (Ring 0 vs Ring 3).
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CS401 - Computer Architecture and Assembly Language Programming Examination Practice
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For the following 80386 Protected Mode 8-byte segment descriptors, determine and extract the values of the 20-bit Limit, Accessed bit (A), Present bit (P), and Available bit (AVL):
1. `dd 0x00FEADEF, 0x00B60718`
2. `dd 0xF8E2135A, 0x13DC1258`
The VESA VBE 2.0 (Video Electronics Standards Association BIOS Extension) specification standardizes which type of display mode in IBM-compatible PCs?
How much total physical memory address space can a 32-bit address register access in protected mode?
In 32-bit x86 protected mode, what is the maximum addressable memory capacity accessible using flat linear addressing?
Name and describe the functional roles of any two descriptor types used in x86 Protected Mode architecture.
The VESA VBE 2.0 specification provides standard BIOS extensions primarily for managing which display modes?
How much physical memory address space can a 32-bit address register access in protected mode?
In x86 Protected Mode segment selectors, setting the Table Indicator (TI) bit to ________ selects the Global Descriptor Table (GDT).
In VESA 16-bit high-color graphics mode, how are the color bits organized for the Red, Green, and Blue (RGB) components of each pixel?