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Re: Graphics modes other than mode 13H

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  • joearellano2000
    ... I also have question about this topic the following reference comes from a publication written in 92 and I know that computers today are much different
    Message 1 of 8 , May 11, 2002
      --- In assemblyassist@y..., saltmeister_one <no_reply@y...> wrote:
      > Does anybody know how to get into any of these video modes?
      >
      > 640 x 350 x 16 colours (EGA)
      > 640 x 480 x 16 colours (VGA)
      > 640 x 400 x 256 colours
      > 640 x 480 x 256 colours (SVGA)
      > 800 x 600 x 256 colours (SVGA)
      >
      > Thanks for any help.
      >
      > Saltmeister.

      I also have question about this topic the following reference comes
      from a publication written in 92 and I know that computers today are
      much different then they were back then, but can any of this info be
      useful in learning graphics programming .


      VGA VIDIO MODES
      MODES NUMBER OF TYPE TEXT TEXT SCREEN BUFFER SCREEN
      COLORS ROWS PIXEL BOX PAGES ADDRESS PIXELS
      0,1 16 alpha 40x25 8x8 8 B8000H 320x200
      8x14* 320x350
      9x16+ 360x400
      2,3 16 alpha 80x25 8x8 8 B8000H 320x200
      8x14* 320x350
      9x16+ 360x400
      4,5 4 gra 40x25 8x8 1 A0000H 320x200
      6 2 gra 80x25 8x8 1 A0000H 640x200
      7 - alpha 80x28 9x14 8 B0000H 720x350
      9x16+ 720x400
      13 16 gra 40x25 8x8 8 A0000H 320x200
      14 16 gra 80x25 8x8 4 A0000H 640x200
      15 - gra 80x25 8x14 2 A0000H 640x350
      16 16 gra 80x25 8x14 2 A0000H 640x350
      17 2 gra 80x30 8x16 1 A0000H 640x480
      18 16 gra 80x30 8x16 1 A0000H 320x200

      legend:
      alpha=alphanumeric modes (text)
      gra=grapics modes
      *=ega enhanced modes
      +=vga enhanced modes

      also does the DAC still provide a set of 256 color registers, or the
      three color drivers for an analog display?
    • md1210us
      ive got upto vga 640x320 in b/w by going into the mode with int 10 and the writing a some abertray byte value to vidio memery in seqence.and noteing what addr
      Message 2 of 8 , May 27, 2002
        ive got upto vga 640x320 in b/w
        by going into the mode with int 10
        and the writing a some abertray byte value
        to vidio memery in seqence.and noteing what addr started
        displaying a pixel ect
        but i noted the byte value affected the hor size of the pixal
        not the color"pixal is always white" as it is in the lower
        vidio modes cga,ect.
        i then read a book that explained trhat in 640x320
        you use the output to port ie: "out ax,dl"
        and dl is a byte value that changes the color of the pixels
        untill you change it again.i dont remember the port addr
        but the addr number out of the book worked on my sx386
        so it must be a standerd addr.as for all the higher modes
        ie: greater then basic "screen9" good luck cuz i looked and havent
        found any infomation.if you find any please post it as im sure there
        are many who have looked and couldnt find any data above the 640x320
        vga level.
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