Quote:
Originally Posted by Mark1960
I’m a bit suspicious of the chip select on the 100ms sweep. I’d expect...
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I am wondering if the address decoding is incomplete (by design) so the PROM gets selected more than once per sweep through the whole address range. 100mS / Div is rather slow, isn't that a five second sweep time? (screen is 50 divisions across). I would be expecting to see 'block' bursts of chip selects at such a slow speed. Let's just try it up at a higher sweep speed as you originally suggested.