MEGA65 Welcome Guide
13.4 Video capture cards
One advantage to having two simultaneous video outputs is you can send one to a monitor and another to a device such
as a video capture card. I used VGA to the Dell and HDMI to an Elgato Camlink to take the screenshots in this Guide.
(You can also take screenshots with the M65Connect app and the JTAG connection. See Using the JTAG connector.)
I was not able to capture screenshots of the C64 core with the Camlink. The C64 core only knows how to simulate a
PAL machine, and the Camlink apparently doesn’t like whatever video signal it produces.
13.5 Resolution and aspect ratio
The MEGA65 core produces an image in a resolution and refresh rate that corresponds with the emulated vintage
display format: PAL or NTSC.
In PAL mode, MEGA65 produces an image with a resolution of 720 x 576, and a refresh rate of 50 Hz.
In NTSC mode, MEGA65 produces an image with a resolution of 720 x 480, and a refresh rate of 60 Hz.
The MEGA65 image is intended to be rendered in an aspect ratio of 4:3. If you do the math, you may notice that the
output resolutions are not 4-to-3: 720:576 = 5:4, and 720:480 = 3:2. In the intended display, the pixels are not meant
to be square. The monitor will reshape the pixels to the intended aspect ratio.
This behavior is produced by the MEGA65 core. Other cores may generate images at other resolutions and refresh
rates, and may have their own compatibility issues with some displays.
13.6 A List of Monitors
We’re maintaining a list of tested monitors in the MEGA65 Wiki. Feel free to contribute your results!
88 Chapter 13. Video display compatibility
To Next Page
Loading...