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> OS Construction > gui methods in real mode |
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windwakr 21 Nov 2009, 04:50
Look up VESA.
There's some good info on it here: http://www.monstersoft.com/tutorial1/VESA_intro.html I've also seen some VESA stuff here on the forums, try searching around. |
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21 Nov 2009, 04:50 |
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GhostXoPCorp 21 Nov 2009, 04:55
great thank u so much for the fast response
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21 Nov 2009, 04:55 |
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Dex4u 21 Nov 2009, 16:28
Here is how vesa bank switching works in real mode
As your in realmode your limted to 64k, so this mode uses 1 boxs 64k in size, you need to swich boxs eg: ********box0**** 64k ********box1**** 64k ********box2**** 64k ********box3**** 64k ********box4**** 64k **************** Here this may help Code: ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;; ;; ;; fasm example.By Craig Bamford (Dex) 2002. ;; ;; 640*480 8bpp (256 colors) vesa1 ;; ;; C:\fasm vesa1.asm vesa1.com ;; ;; ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ORG 100h Start: mov ax,4f02h mov bx,101h int 10h mov dx,0xa000 mov es,dx call window StartAgain: xor dx,dx mov [color],0 MainLoop: push dx call window xor bx,bx inc [color] mov al,[color] call static pop dx cmp dx,4 je StartAgain inc dx ;<** here is box number mov ah,01h int 16h jz MainLoop mov ah,00h int 16h mov ax,0003h int 10h ret window: mov ax,4f05h mov bx,0 int 10h xor bx,bx ret static: stosb inc bx cmp bx,0x00000 jne static ret color db 0 Row db 0 More info here: http://board.flatassembler.net/topic.php?t=6032 PS: I am working on a Dos port of my GUI, but will switch between real amd pmode to run Dos programs, you may want to look into that. |
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21 Nov 2009, 16:28 |
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