Basic knowledge was: Was FORTRAN buggy
16 ma seems consistent with a spec of "8ma, averaged between 0 and 1 outputs".
On what basis do you add the input sink requirement to the output sink capability? Also, IIRC how TTL gates work, wouldn't the total I-O current per gate be approximately 1.6 mA?
A valid point.
A Watt or less sounds like it might be closer to the truth.
That sounds like it is at least an order of magnitude too high even if the registers were built out of discrete gates. However IIRC the original PDP-11 used small TTL memory chips to implement the registers, the internal gates within these probably consumed considerably less I-O current than a gate designed to interface with the external world. Even if the PDP-11 had used D type flip-flops to implement the registers, the current would probably be less than 1.6 mA per equivalent gate because the gates internal to the chip probably consume less than 1.6 mA of I-O current per gate.
Of course as you noted above all this ignores any current required for the internal operation of the gates.
in the last half of the last century (as computerized dataprocessing proliferated), there were still quite a few people that had been born before 1900. reference to a old "y2k" like problems somebody posted...
True, but we have already save enough power on the registers to operate all this other stuff.
Regards,
i was told a tale about the gov. anti-trust trial ... supposedly all of the bunch testified that by the late...
John Byrns
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