Simple VGA mode clearscreen?...

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niels38

Joined: 13 Oct 2004
Posts: 6
Location: The Netherlands

niels38 13 Oct 2004, 17:04

hello...

I want to clear the screen...ALL of IT!!! Very Happy

did put up the right videomode 320x200x16c

I guess it's something with the 'pointer to memory'
the es:di line...

anybody.... Embarassed

of course the code I'm showing here was not the first try... Shocked

16bit-20bit-32bit, @@@@@

...as if tanks should stay compatible with a sword...
although offtopic, I'm a sword-man myself, rather than a tank...

Code:

use16
org 256

        mov ax,013h
        int 10h


        mov ax,0A000h
        mov es,ax

        mov cx,200d


        mov di,0h
        mov ah,0Ch
        mov al,04h
Begin:  mov [es:di],al
        int 10h
        inc di

    dec cx
    jnz Begin


; dos exit
int 20h

thanks in advance, I hope.... Confused

_________________
Are there really rules, in here?

13 Oct 2004, 17:04

niels38

Joined: 13 Oct 2004
Posts: 6
Location: The Netherlands

niels38 13 Oct 2004, 17:09

let me myself have the first reply to this...

the 16bit-20bit-32bit is about the bus (of course), not that the fact that I'm wishing that every boolean ain't smaller than 256 bit....

is the newbie-ism, dripping off my fingers....?

13 Oct 2004, 17:09

Octavio

Joined: 21 Jun 2003
Posts: 366
Location: Spain

Octavio 13 Oct 2004, 17:54

first learn a bit more here.
http://www.ctyme.com/intr/rb-0104.htm
second: you don't need to clear screen after seting a video mode.
and the bios donÂ´t must be used to write pixels because is too slow.
Search some docs about vga and vesa and read them.

13 Oct 2004, 17:54

niels38

Joined: 13 Oct 2004
Posts: 6
Location: The Netherlands

niels38 13 Oct 2004, 18:00

thankx, octavio

i sure do have some learning to do...

but the goal was not clear screen after setting videomode;
more like writing to videomemory with one color filling the screen; followed by making it to, filling it with alot of colors... Razz

then making a screenbuffer, etc,etc...

i saw a helping link ahere on the forum too...
http://board.flatassembler.net/topic.php?t=2187

13 Oct 2004, 18:00

niels38

Joined: 13 Oct 2004
Posts: 6
Location: The Netherlands

niels38 13 Oct 2004, 18:07

The thought of u'r message was clear...b.t.w.

I know GOD is saying 2 man all the time RTFM!!!!!

But His I read carefully...

Very Happy

13 Oct 2004, 18:07

niels38

Joined: 13 Oct 2004
Posts: 6
Location: The Netherlands

niels38 14 Oct 2004, 14:22

got it going allright...pjiffffff

14 Oct 2004, 14:22

Matrix

Joined: 04 Sep 2004
Posts: 1164
Location: Overflow

Matrix 14 Oct 2004, 15:27

Hy,
what video modes do you wanna use?

i give you a hint:

http://board.flatassembler.net/topic.php?p=14822#14822

MATRIX

14 Oct 2004, 15:27

niels38

Joined: 13 Oct 2004
Posts: 6
Location: The Netherlands

niels38 14 Oct 2004, 19:31

I use 320x200x256 indeed
I saw the msg u linking to, tnx.

14 Oct 2004, 19:31

vid
Verbosity in development

Joined: 05 Sep 2003
Posts: 7103
Location: Slovakia

vid 17 Oct 2004, 19:36

it is also about 4 (or more) times faster to do it in x (tweaked?) mode, with all planes enabled.

17 Oct 2004, 19:36

Matrix

Joined: 04 Sep 2004
Posts: 1164
Location: Overflow

Matrix 28 Oct 2004, 09:47

Hy VID,
you can be right, have you done such a thing so far?
is it working on all computers?

28 Oct 2004, 09:47

decard

Joined: 11 Sep 2003
Posts: 1092
Location: Poland

decard 28 Oct 2004, 13:48

Hi Matrix,
There are many of tweaked (ModeX) screen modes, some will work on specific cards only, but many of them will on all modern hardware. the topic is very interesting, if you want to learn more then just google for mode-x programming. Just to add, the biggest number of modes that work on most computers is handled by Allegro Game Library..

28 Oct 2004, 13:48

Matrix

Joined: 04 Sep 2004
Posts: 1164
Location: Overflow

Matrix 28 Oct 2004, 13:54

hy, and thnx
i 'm exactly on directly communicating with pci / isa cards (hardware)
and building a PC scope card, and many more.

28 Oct 2004, 13:54

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