I am creating a small 32 bit operating system. I have written the boot loader in assembly language, written the kernel's entry in assembly and I am currently writing the kernel in c. In the bootloader, I have already switched to 32 bits protected mode. After that I called my kernel from memory address 0x1000. Everything is working perfectly as I can even print text to the screen by writing to memory address 0xb8000.My main question is this:
How do I switch to video(pixel plotting) mode from my kernel in protected mode. I know how to do this from 16 bits real mode from my boot loader by setting register ah to 0x00 and al to 0x13 then calling interrupt 0x10 but I have no idea of how to go about this from c code in protected mode. Help of any kind would be greatly appreciated. Thanks in advance
Additional information: I am using NASM to compile assembly code and Cygwin gcc to compile c code.
Switching from text mode to graphics mode from c in 32 bit protected mode
1.5k Views Asked by preciousbetine At
0
There are 0 best solutions below
Related Questions in C
- Passing arguments to main in C using Eclipse
- kernel module does not print packet info
- error C2016 (C requires that a struct or union has at least one member) and structs typedefs
- Drawing with ncurses, sockets and fork
- How to catch delay-import dll errors (missing dll or symbol) in MinGW(-w64)?
- Configured TTL for A record(s) backing CNAME records
- Allocating memory for pointers inside structures in functions
- Finding articulation point of undirected graph by DFS
- C first fgets() is being skipped while the second runs
- C std library don't appear to be linked in object file
- gcc static library compilation
- How to do a case-insensitive string comparison?
- C programming: Create and write 2D array of files as function
- How to read a file then store to array and then print?
- Function timeouts in C and thread
Related Questions in ASSEMBLY
- (x64 Nasm) Writeline function on Linux
- Is the compiler Xcode uses to produce Assembly code a bad compiler?
- Why do we need AX instead of MOV DS, data directly with a segment?
- Bootloader in Assembly with Linux kernel
- How should the byte sequence 0x40 0x55 be interpreted by an x86-64 emulator?
- C++ code into assembly
- Drawing circles of increasing radius
- Assembly print on screen using pop ecx
- Equivalent to asm volatile in Gfortran?
- Show 640x480 BMP image with inline ASM c++
- Keep track of numbers entered in by a user in assembly
- 8086 Assembly Arrays with I/O
- DB ASM variable in Inline ASM C++
- What does Jump to means in callgrind?
- How to convert binary into decimal in assembly x8086?
Related Questions in X86
- Why do we need AX instead of MOV DS, data directly with a segment?
- Drawing circles of increasing radius
- Assembly print on screen using pop ecx
- How to add values from vector to each other
- Intel x64 instructions CMPSB/CMPSW/CMPSD/CMPSQ
- Compact implementation of logical AND in x86 assembly
- Can feenableexcept hurt a program performance?
- How do I display the result and remainder in ax and dx in Assembly (tasm)
- ASM : Trouble using int21h on real machine
- jmp instruction *%eax
- What steps are needed to load a second stage bootloader by name on a FAT32 file system in x86 Assembly?
- Assembly code to print a new line string
- Write System Call Argument Registers
- How to jump to an address saved in a register in intel assembly?
- Find middle value of a list
Related Questions in OSDEV
- Rustc/LLVM generates faulty code for aarch64 with opt-level=0
- MinGW's ld cannot perform PE operations on non PE output file
- GCC 5.1.0-4 cross compiler build fail
- Link object files from header files in real mode when using GCC -m16 option?
- Constant reboot after setting up the Global Descriptor Table and protected mode
- Can't load flat binary file into kernel
- Linear addressing and the GDT
- How do you find the PCI memory hole on x86?
- Extended ASCII characters are printed in yellow instead of white - OSDev
- The Kernel starts behaving abnormally when the kernel code gets a little bigger
- LD errors while linking 16-bit real mode code into a Multiboot compliant ELF executable
- How can I provide a reliable callback functionality?
- Can HDD emulation be used to allow me to use my own bootable file system on a CD?
- Is it bad that a process should self create an own stack?
- OS development - converting logical block format to Cylinder-Head-Sector
Related Questions in VIDEO-MEMORY
- BIOS Video memory interaction position calculation weirdly
- Scroll Viewers as master of Video Memory management
- How I can read a value from an address in the Bios Data Area correctly?
- Can I use screen pages without calling interrupts?
- Switching from text mode to graphics mode from c in 32 bit protected mode
- WPF Can you clear video memory?
- OpenGL Video Memory Usage
- Direct video buffer access
- What would I have to change to boot this on a physical computer?
- Why is my video memory offset calculation off by one?
- UIImageView & video memory
- CALayer OpenGL(-ES) texture memory usage
- OpenGL out of memory error, large FBO
- write videosystem in fasm assembly
- OpenGL Video RAM Limits
Trending Questions
- UIImageView Frame Doesn't Reflect Constraints
- Is it possible to use adb commands to click on a view by finding its ID?
- How to create a new web character symbol recognizable by html/javascript?
- Why isn't my CSS3 animation smooth in Google Chrome (but very smooth on other browsers)?
- Heap Gives Page Fault
- Connect ffmpeg to Visual Studio 2008
- Both Object- and ValueAnimator jumps when Duration is set above API LvL 24
- How to avoid default initialization of objects in std::vector?
- second argument of the command line arguments in a format other than char** argv or char* argv[]
- How to improve efficiency of algorithm which generates next lexicographic permutation?
- Navigating to the another actvity app getting crash in android
- How to read the particular message format in android and store in sqlite database?
- Resetting inventory status after order is cancelled
- Efficiently compute powers of X in SSE/AVX
- Insert into an external database using ajax and php : POST 500 (Internal Server Error)
Popular Questions
- How do I undo the most recent local commits in Git?
- How can I remove a specific item from an array in JavaScript?
- How do I delete a Git branch locally and remotely?
- Find all files containing a specific text (string) on Linux?
- How do I revert a Git repository to a previous commit?
- How do I create an HTML button that acts like a link?
- How do I check out a remote Git branch?
- How do I force "git pull" to overwrite local files?
- How do I list all files of a directory?
- How to check whether a string contains a substring in JavaScript?
- How do I redirect to another webpage?
- How can I iterate over rows in a Pandas DataFrame?
- How do I convert a String to an int in Java?
- Does Python have a string 'contains' substring method?
- How do I check if a string contains a specific word?