Monitors that can display Amiga 500 Interlace but not Non-Interlace 15khz

 So I was working with some interlace modes and noticed that some monitors would support an Interlaced display but not a Non-Interlace display on my Amiga 500.

The Dell P2213 will show an interlaced Amiga display but "black screen" on a non-interlaced display.

I think it has to do with the "380 line minimum" that I saw on some of the Dell monitors while working with cvt.  Interlaced modes are > 380 and Non interlace is < 380.

I tried a Dell S2415Hb with an interlaced Amiga display and while it would display it, the Auto Adjustment would keep cycling to the point it would force the monitor to shut down and reboot.  I guess that even monitors can "crash".

 

A Planar PXL2780MW will display interlace but blanks out on the non interlace.  Turning its Overdrive setting down to zero makes it flicker less, but it still has noticeable jitter.  (It will also generate some LCD afterimage that will go away after awhile)

An Asus VS197 will display 640x400 interlace with jitter (and looks blurry) but not regular 640x200.

A Dell S2240Mc will display interlace but it also has some jitter issues.

 

An Acer V246HQL will not lock onto 640x200 saying "Input not supported". However, if you switch to 640x400 interlace then turn the monitor on, it will lock on to 640x400 and then you can switch back to 640x200 and it will display properly until you change resolutions again.  The 640x200 display looks nice if you can get it to show up, but that's way too fiddly, requiring you to turn the monitor off and back on.

 

A Dell U2713HMt will not work with 640x200 saying "input not supported", but it will work with a 640x400 interlace signal with visible flicker.  The pixel clock and phase can be adjusted to remove banding.

 

Since monitors like these will  "wink out" when they get a non interlace display, I'll hook up the b/w composite out from the Amiga 500 to a TV so I can see what's happening and try to switch into an interlaced mode.

I wish there were a way to force the Amiga to always generate an interlace mode to work with monitors that only like interlaced signals.