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You want to get at the VESA specs, or more simply to look at the SciTech MGL API.<br />
<br />
See: <br />
<br />
<a href="http://www.scitechsoft.com/dp_mgl.html" rel="ugc">http://www.scitechsoft.com/dp_mgl.html</a><br />
<br />

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You want to get at the VESA specs, or more simply to look at the SciTech MGL API.

See:

http://www.scitechsoft.com/dp_mgl.html [http://www.scitechsoft.com/dp_mgl.html]



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you can change the screen res in dos with this code. This will change the res to 1280x1024<br />
changeres:<br />
<br />
mov ax,4F02h<br />
<br />
mov bx,107h<br />
<br />
int 0x10<br />
<br />
RET<br />
I am not sure how you would draw stuff in dos, I would guess the you would do it by drawing pixel by pixel. 
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you can change the screen res in dos with this code. This will change the res to 1280x1024
changeres:

mov ax,4F02h

mov bx,107h

int 0x10

RET
I am not sure how you would draw stuff in dos, I would guess the you would do it by drawing pixel by pixel.

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I don't think I'd use that... ^^'
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Problem, how do I draw in them??
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You will find that any mode besides #19 (320x200x256) has the screen memory broken into blocks, not just a contigeous 64k block of memory starting at A000h like the mode 19 has. I can't say right now where these blocks are but I'll try and have a look.
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You will find that any mode besides #19 (320x200x256) has the screen memory broken into blocks, not just a contigeous 64k block of memory starting at A000h like the mode 19 has. I can't say right now where these blocks are but I'll try and have a look.

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<div class="content wysiwyg-content">
Could anyone tell me how do I get a screen with 640*480*256,<br />
800*600*256 or any higher resolutions? And how do I draw(lines, circles...etc.) in them?
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Could anyone tell me how do I get a screen with 640*480*256,
800*600*256 or any higher resolutions? And how do I draw(lines, circles...etc.) in them?

Hi-Res Graphics in DOS

C is a general-purpose, imperative computer programming language, supporting structured programming, lexical variable scope and recursion, while a static type system prevents many unintended operations. By design, C provides constructs that map efficiently to typical machine instructions, so it has found lasting use in applications that had formerly been coded in assembly language, including operating systems as well as various application software for computers ranging from supercomputers to embedded systems. It is distinct from C++ (which has its roots in C) and C#, and many later languages have borrowed directly or indirectly from C.