Can I draw a pixel without assembly

[ShyLittleMeowMeow]

Hi, I wonder if I can draw a pixel without assembly, I don't know anything about assembly, there's no source to learn, I just clone the Meaty Skeleton then start writing C, oh right. A few days ago I ask how to write memory management, I manage to make it works , the point is I just write everything in C, not even a single assembly code. So I can't manage to follow this tutorial as it is requires in this tutorial

https://wiki.osdev.org/User:Omarrx024/VESA_Tutorial

Anyways I have another account is Chu_Meo_E_Then, I sign in this account in another computer then I get blacklisted so I have to use create another account

[Octocontrabass]

I don't know anything about assembly,

You need to learn at least a little bit of assembly if you want to write an OS.

So I can't manage to follow this tutorial as it is requires in this tutorial

Forget that tutorial. You're using Multiboot, so you can edit your Multiboot header to request a framebuffer. You'll find the address of the framebuffer in the boot information structure. You don't need to write any assembly to do that.

Anyways I have another account is Chu_Meo_E_Then

An account by that name doesn't exist. There is an account named "ChuMeoEThen" but it doesn't appear to be banned.

[ShyLittleMeowMeow]

An account by that name doesn't exist. There is an account named "ChuMeoEThen" but it doesn't appear to be banned.

True, I don't know why but, I get blacklisted and thanks

[ShyLittleMeowMeow]

Sorry for annoying but I don't understand what do you mean by "edit your Multiboot header to request a framebuffer" so I hope you can explain it to me

[Octocontrabass]

I don't understand what do you mean by "edit your Multiboot header to request a framebuffer"

Set bit 2 of the flags and fill in whatever you want for mode_type, width, height, and depth. You can read more about it here.

[ShyLittleMeowMeow]

Where I can set bit 2 of the flag ?

[iansjack]

Read about the Multiboot header in the specification. Any good C tutorial or book will teach you how to manipulate individual bits using the bitwise logical operators.

This is essential knowledge that you need to master before proceeding.

[ShyLittleMeowMeow]

So after awhile trying, I set flags into

Code: Select all

.set FLAGS,    1<<2

in boot.S and everything goes black, there's no text. is it still okay ?

[nullplan]

Of course. This way, you request a framebuffer, so the screen is cleared and switched to graphics mode, and now you can draw to the framebuffer.

[ShyLittleMeowMeow]

thanks you guys alot

[ShyLittleMeowMeow]

yea and now I don't know how to draw a pixel

[Klakap]

Informations here should help you: https://wiki.osdev.org/Drawing_In_a_Lin ... ing_Pixels