[Coco] Artifacting on LCD?
nickma at optusnet.com.au
Thu Apr 9 17:39:57 EDT 2009
No artifacting on LCD...in the same sence that artifacting on a
composite or RF monitor produces.
There is some image distortion if you are suppling an LCD of a certain
native resolution (eg, 1024x768) but are delivering a different
resolution to it (eg. 640x240 or scan doubled (640x480). The LCD
circuitry normally scales the lower resolution image to fit the LCD
native resolution and this causes a distortion.
If it didn't scale up, the image would appear as a small box on the
screen surrounded by large black borders to fill the unused areas.
I personally hate using an LCD on a CoCo due to the "degraded" image
sharpness from the upscaling effect.
I prefer to get a 15Khz RGB monitor (such as the Commodore Amiga 1084
series, Magnavox equivalent or just a Tandy CM8).
With a CoCo connected. you can't see scanlines on an LCD when the low
res image is scandoubled but I find this gives pixels a rather blocky
appearance compared to the smoothed look I get from a CRT.
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