Mark Pizzolato 62e36241a4 PDP11, VAX: Support multiplexer input speeds greater than 9600bps for console, DZ, VH, DL and DC devices ...

Each of the speeds greater than 9600bps deliver a character in less than
1ms.  Computing inter-character delays in microseconds therefore can't
be precise enough to be well behaved.  Measuring the inter-character
delays in instructions (scalled by the calibrated clock) gets us the needed
precision.

2015-11-25 04:25:21 -08:00

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