Does anyone know the specs of the video output of the VT320? Several sources repeat that its resolution is "800x500", but that doesn't vibe with the...
I second this theory. The '374 is the "clocked" version of that type of latch, I suspect it's set up so it latches when it receives a "strobe" signal...
A real MDA only has 4K of RAM on it and every speck minus 96 bytes is needed for the character and attribute buffer. So, no, no redefining character...
There is a timing diagram here that suggests that's exactly what happens. Or, sort of, anyway. it actually shows M16 getting sampled twice with this...
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