Video in graphic mode

KuzinAlexandr · **Joined:** Wed Oct 18, 2023 9:55 am **Posts:** 1

Hello other forum users. I'm wondering how video memory can be used in graphics mode. In text it is used like this:

Code:

char* videoptr = (char*)0xb8000;

void kmain()
{
    videoptr[0] = 'H';
    videoptr[1] = 0x07;
}

I heard that the address 0xA0000 is already used for the graphic mode

I would like to receive a code snippet for using the graphical mode.

Octocontrabass · **Joined:** Mon Mar 25, 2013 7:01 pm **Posts:** 5147

KuzinAlexandr wrote:

I'm wondering how video memory can be used in graphics mode. In text it is used like this:

You can access video memory the same way in graphics mode. The specifics depend on which mode you're using.

KuzinAlexandr wrote:

I heard that the address 0xA0000 is already used for the graphic mode

Standard VGA modes 0xD, 0xE, 0xF, 0x10, 0x11, 0x12, and 0x13 use address 0xA0000. Standard VGA modes 0x4, 0x5, and 0x6 use address 0xB8000. Non-standard modes can use other addresses.

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Video in graphic mode

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