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What is the most susceptible to screen roll?

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#1 Gemintronic OFFLINE  


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Posted Tue Dec 11, 2018 2:05 PM

I'm trying to determine the most susceptible display device to the screen roll that comes with going over-cycle.  I figured the most touchy one is the one I'd use for hardware testing.  


So far I've got:

A modern TV with RF tuner.

A VCR attached to a Commodore 1702


I need to get a plain, old CRT TV.



In any case, are my first two options good enough?  Is a stand alone CRT TV with RF the best option?

#2 SpiceWare ONLINE  



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Posted Tue Dec 11, 2018 2:45 PM

With my Commodore 1084S I can tell if the program generates +/-1 scanline vs the prior frames.  


You can easily test your displays using Jitter (scroll down to How to Test to find it). Use joystick to set the # to 129, then tap the fire button to simulate an over-cycle event. On my 1084S the top of the image (the transition from black to white) will visibly move whenever fire is tapped.


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