> On May 26, 2016, at 6:05 PM, Clem Cole <cl...@ccc.com> wrote: > > > On Thu, May 26, 2016 at 4:56 PM, Mark Pizzolato <m...@infocomm.com > <mailto:m...@infocomm.com>> wrote: > I agree. If this whole discussion is about if a simulated card reader device > interface should try to magically correct for garbage input (i.e. lines longer > than card images), then I suggest that the best simulation is to behave as > closely to how real systems worked. > > The question of what real systems did is open. IIRC TSS as a system read in > all 80 columns, but as was pointed out the FTN compiler ignored them. But > not all of them did. I still have the algol-w compiler source around > somewhere in PL/360 -- which might give you a hint
I have never heard of any device that wouldn't give you 80 columns. Even limited systems like the 1620 which believed that the only I/O encoding was the one it implemented didn't do any such thing. I just remembered one example of an 80 column card with something beyond column 80, but that isn't really relevant to computer I/O and I don't think computers paid attention. That is the verifying mode of some keypunches (model 129?) where successful verification of the card would cause it to be marked with a punch in "column 81". paul
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