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A comment on Atari 520ST Review in Creative Computing – By Paul Lefebvre. Parent comment

Re:Atari 520ST Review in Creative Computing – By Paul Lefebvre by vardump on Monday June 24, 2024 @05:07AM (#40773864)
ECS and AGA could do non-interlaced 400 line scanning.

ECS could do non-interlaced 640x480 (+overscan) with 4 colors. In the documentation, 35 nanosecond pixels.

AGA same, but with 256 (or 262144 HAM) colors.

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Re:Atari 520ST Review in Creative Computing – By Paul Lefebvre by icedchai on Monday June 24, 2024 @06:27PM (#40781735)
Almost nobody had a monitor that supported those modes.
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Re:Atari 520ST Review in Creative Computing – By Paul Lefebvre by ChainOfFools on Tuesday June 25, 2024 @01:21PM (#40791053)
Exactly what I was thinking of with respect to kludges necessary for backwards compatibility.

I think Commodore made one monitor that supported a bi-modal scan rate, and it was something like twice as expensive as the the regular Amiga monitor range. I also recall a somewhat exotic NEC 17" flat-face CRT monitor that was completely out of the question pricewise for almost anybody except institutions, that also could do it by virtue of having a continuously variable sync clock from 15 khz up to 45 or so.

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Re:Atari 520ST Review in Creative Computing – By Paul Lefebvre by vardump on Tuesday June 25, 2024 @07:00PM (#40794673)
People certainly had VGA monitors back then!

The problem is not VGA 31 kHz modes, but old 15 kHz ones.

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Re:Atari 520ST Review in Creative Computing – By Paul Lefebvre by icedchai on Wednesday June 26, 2024 @08:25AM (#40799174)
Yes, I had one on my A3000 (which has a deinterlacer / scan doubler built in, so the old modes weren't a problem.)

Most Amiga modes are 15 khz. The average person with an A500 or A1200 would have a 1084S and get zero value out of the new modes.

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