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The Hall SC-VGA-2 Video Processor, the Atari ST and NeXTSTEP
A periodic fascination on this blog is figuring out better ways to get better screenshots of our classic systems, which often hail from the ...
These machines ran HP-UX 10.10 in their original heyday, but this particular system runs NeXTSTEP 3.3 for PA-RISC during the brief period of time NeXT supported the architecture and was a big hit at the Vintage Computer Festival West a few years ago. In addition to slicing, dicing and pureeing, apparently, it will take any of a bundle of input formats and both rescale and resample them on the fly into the VGA or HDTV signal you desire, including 60Hz rates. The other, smaller chip near the input port is an MStar MST9883, which is an overgrown A/D converter sampling analogue pixel data and emitting a serial stream of digital RGB and clock for the video ASIC.
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