drawing with VGA

[alberinfo]

ok, now trying on fonts.but it doesnt draw nothing or garbage. I.E, if i put the character is 'A' when calling the drawchar func, it doesn't do anything, and if i put the font as a character, then it draws garbage. also i have a problem between the paging and VBE, i cannot access the LFB when paging enabled(it works with paging disabled).can you help me?

Thanks!

[MichaelPetch]

Is your latest code (that doesn't work) in your github account? If it is, are you aware that the video mode being used is a text mode? In QEMU it is 80x25 where the LFB is at 0xb8000. I get the same result of a purplish object on the screen when 'A' is printed whether I enable paging or not (in setup.c). It ill be garbage in text mode because text mode uses 2 bytes for each cell (one character is character, and the other is the attribute). The reason LFB doesn't work is because your function id_map_lfb() is completely broken. It doesn't create proper page tables and page table entries so when you enable paging - any attemptto write to the LFB will fail.

[alberinfo]

Is your latest code (that doesn't work) in your github account?

no, it's not.i've updated the code, so now you can check it out.

The reason LFB doesn't work is because your function id_map_lfb() is completely broken. It doesn't create proper page tables and page table entries so when you enable paging - any attemptto write to the LFB will fail.

you're actually right; i was trying something to map the lfb, but it didn't actually work.

Thanks!