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- :
-
-
- Resolutions available on the Atari Falcon030
- (c) 1992 Atari Corp. Written by John Townsend
- =========================================================================
- This document may be re-printed again and again as long as the Atari
- copyright remains intact.
- =========================================================================
-
- A couple of notes: Unlike previous machines, there are just too many
- resolutions to give each resolution a name. Therefore, I will do my best to
- describe what the resolution is and which monitor it is on.
-
- - NOTE: TV and a Color Monitor are the same.. by Color Monitor, I am
- talking about the standard SC1224. By VGA, I mean a standard VGA
- Monitor.
-
- 40 column modes ( "column" means the number of x pixels divided by 8)
- ---------------
- 4 color, normal, TV: 320x200, 4 colors, 2 planes
- 16 color, normal, TV: 320x200, 16 colors, 4 planes
- 256 color, normal, TV: 320x200, 256 colors, 8 planes
- True color, normal, TV: 320x200, true color
- 4 color, interlace, TV: 320x400, 4 colors, 2 planes
- 16 color, interlace, TV: 320x400, 16 colors, 4 planes
- 256 color, interlace, TV: 320x400, 256 colors, 8 planes
- True color, interlace, TV: 320x400, true color
-
- 4 color, normal, VGA: 320x480, 4 colors, 2 planes
- 16 color, normal, VGA: 320x480, 16 colors, 4 planes
- 256 color, normal, VGA: 320x480, 256 colors, 8 planes
- True color, normal, VGA: 320x480, true color
- 4 color, line-doubling, VGA: 320x240, 4 colors, 2 planes
- 16 color, line-doubling, VGA: 320x240, 16 colors, 4 planes
- 256 color, line-doubling, VGA: 320x240, 256 colors, 8 planes
- True color, line-doubling, VGA: 320x240, true color
-
- 80 column modes
- ---------------
- 2 color, normal, TV: 640x200, 2 colors, 1 plane
- 4 color, normal, TV: 640x200, 4 colors, 2 planes
- 16 color, normal, TV: 640x200, 16 colors, 4 planes
- 256 color, normal, TV: 640x200, 256 colors, 8 planes
- True color, normal, TV: 640x200, true color
- 4 color, interlace, TV: 640x400, 4 colors, 2 planes
- 16 color, interlace, TV: 640x400, 16 colors, 4 planes
- 256 color, interlace, TV: 640x400, 256 colors, 8 planes
- True color, interlace, TV: 640x400, true color
-
- 2 color, normal, VGA: 640x480, 2 colors, 1 plane
- 4 color, normal, VGA: 640x480, 4 colors, 2 planes
- 16 color, normal, VGA: 640x480, 16 colors, 4 planes
- 256 color, normal, VGA: 640x480, 256 colors, 8 planes
- 4 color, line-doubling, VGA: 640x240, 4 colors, 2 planes
- 16 color, line-doubling, VGA: 640x240, 16 colors, 4 planes
- 256 color, line-doubling, VGA: 640x240, 256 colors, 8 planes
-
- and lastly.. there are compability modes for ST Low, ST Medium, and ST High on
- both VGA monitors and SC1224 monitors. (On a color monitor, ST High is
- achieved by using the interlace mode).
-
- Also, the ST Monochrome monitor (the SM124) will work with Falcon030 as well.
- However, it only supports one resolution: ST High Resolution.
-
- All modes on a TV can be overscanned. This means multiplying the X and Y
- resolution by 1.2. For example, modes with 320 pixels of horizontal resolution
- (X res) will become 384 pixels across, and modes with 640 pixels will become
- 768 across. Overscanning is done in the X and Y resolution. You can't do them
- independently. Special Note: On a VGA monitor, overscan is "faked".. since the
- video hardware doesn't have the capability to do overscan on a VGA monitor, we
- made it so that if a overscan mode is set on a VGA monitor, you still see the
- normal size screen, but the screen is a window onto the bigger overscanned
- image. Make sense? We did this for compatibility. This way if a game that has
- an overscanned starup picture can use the same pic on both the VGA monitor and
- the TV monitor. Pretty cool, eh? <grin>
-
- BTW.. Overscan can NOT be set from the desktop. The AES and Desktop will work
- just fine with it, but because you can't see the parts of the screen, we
- thought that that option shouldn't be available from the desktop. We don't
- want to confuse people. However, Overscan can be set using a new XBIOS call
- (Vsetmode()).. so it is still available.
-
- I hope I haven't made any mistakes. I triple-checked this document in search
- of errors and I couldn't find any. If you do find some, send me Email on GEnie
- (to TOWNS) or CIS (70007,1135) and let me know.
-
- -- John Townsend, Atari Corp.
-
- PS. Anyone would would like to reprint this message, please do so!
- The smaller the number of times I have to type that message, the
- more my fingers with thank you! ;-)
-
- After looking at this one more time.. one point to clear up: By
- saying SC1224 Color Monitor, I mean any Color Monitor that Atari
- have manufactured for the ST/Mega/STE/MegaSTE computers. Clear
- as mud? ;-)
-
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