4 ms·
Any resolution with 400 pixel vertical scan on the Amiga was interlaced, no exceptions until too many years after the first OCS and ECS chipsets released. and
by ChainOfFools 2y ago
Any resolution with 400 pixel vertical scan on the Amiga was interlaced, no exceptions until too many years after the first OCS and ECS chipsets released.
and when the solutions did come they were burdoned by kludges necessary so as not to break backwards compatibility - and especially not to complicate life for the killer app of the platform at the non-gaming level, the video toaster, which was very tightly integrated with the Amigas interlaced video system.
- vardump 2y agoECS 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.
- icedchai 2y agoAlmost nobody had a monitor that supported those modes.
- ChainOfFools 2y agoExactly 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.
- vardump 2y agoPeople certainly had VGA monitors back then! The problem is not VGA 31 kHz modes, but old 15 kHz ones.
- icedchai 2y agoYes, 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.