> > Sorry if I wasn't clear in my earlier reply, but there were some answers > inline. The summary is that Vcc looks fine, there does not seem to be any > short on the outputs of the shift register and the chip seems to be working > correctly. It just gets hot and I wonder if this could be due to the CLK > input being a bit spikier on the VT100 than on my VT102? Could this be why > later revisions of the VT100 introduced an inductor on the DOT CLK output > from the DC011? >
Perhaps one way to test the hypothesis would be to insert an inductor like those used on the later revisions in the DOT CLK output and check whether a) everything still works and b) the shift register runs cooler? Regards, Peter Coghlan.
