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V1.1 March 2019
Video Settings
Recommended Scaling Settings
If you are outputting your Mega Sg to a 1080p
or 4K native display and you care about seeing the
vertical borders, then you should use 4x vertical
scale. If you do not care then you should use a
5x vertical scale. Ideally, the Genesis/Mega Drive
displayed 320 pixels in a 32:35 or .91:1 ratio and 256
pixels in a 8:7 or 1.14:1 ratio.
720p - x320 Width 1020 (Square Pixels)
(3x320) / x256 1088 Width (4x256)
Horizontal Position 21
Height 720 (3x)
Vertical Position 39
720p 320x224 3x/3x
Width 1020 (Square Pixels) (3x)
Horizontal Position 27
Height 720
Vertical Position 39
1080p 4x - x320 Width 1360 (4:3 for 16:10)
(4x320) / x256 1360 Width (5x256)
Horizontal Position 19
Height 960
Vertical Position 51
1080p 320x224 4x/4x
Width 1360 (4:3 for 16:10) (4x) (5x 256p)
Horizontal Position 23
Height 960
Vertical Position 51
1080p 256x224 6x/5x
Width 1632 (6x 256p)
Horizontal Position 10
Height 1200
Vertical Position 47
1080p 5x - x320 Width 1700 (Square Pixels)
(5x320) / x256 1632 Width (6x256)
Horizontal Position 16
Height 1200
Vertical Position 47
Screen Size
In the simplified Screen Size setting, height settings
are given only for 1080p modes. Horizontal and
Vertical Interpolation are enabled and the Borders
are disabled.
Scalers
Several scalers are available if you wish to
apply them. “No scaler” uses nearest-neighbor
interpolation where the color of a pixel is repeated
horizontally and vertically as often as is necessary
to get to the desired scaled resolution. This results
in the sharpest, “pixel purist” graphics but can leave
uneven horizontal pixels if the scaled resolution
is not an integer multiple of the original resolution.
The HQ2x, HQ3x and HQ4x scalers interpolate a
pixel based on the surrounding pixels. The result
is generally a smoother image. The 2x, 3x and 4x
refer to blocks of pixels, and the larger the block,
the fewer colors will be used. Scale 2x and Scale 3x
use a somewhat different algorithm but produce a
similar result. X-Ray uses a simple algorithm to give
inverted black and white graphics.
Using scalers may shift the image slightly, alter the
colors considerably and will cause a little extra lag
due to the processing of the image required.
The Disable H and V Interpolation options are
useful with 8:7 and 4:3 for 16:9 or 16:10 modes with
no scaler. These modes subtly blend the edges
of pixels to make uneven nearest-neighbor scaled
pixels less noticeable. It can also eliminate shimmer
in scrolling backgrounds on LCD displays. Genesis/
Mega Drive games can freely switch between 320
and 256 pixel screens, so shimmering will be more
apparent than a NES or a SNES as a result without
integer scaling or interpolation. If you are using a
true integer horizontal or vertical scale, you should
not need to use these options.
When the Disable Horizontal or Vertical
Interpolation box is checked, that means the
interpolation is NOT being applied to the video.
You can set each form of interpolation
independently.
