[Simh] Question about card readers.

[Richard Cornwell]

Hi Rich

> > Date: Wed, 25 May 2016 18:07:15 -0400
> > From: Richard Cornwell <skyvis at sky-visions.com>
> 
> >    I am asking for feedback on how to handle Punched card input. I
> > am wondering about how to handle the case of reading a greater then
> > 80 character record on a 80 character punch card. Should characters
> >    beyond the end of the card be truncated, or should they continue
> > on the next card. 
> 
> >    Any ideas? 
> 
> Hi, Rich,
> 
> Would you mind expanding on the query a bit?  Since an 80-column card
> can't store more than 80 characters' worth of data, how can there be
> anything to be truncated or continued in a read?

  Sometimes there is extra stuff in a line, or sometimes records come
  from other sources. For example the IBM 7090 used 84 character
  records on tape. But the native reader could only read in 72 columns.
  Sometimes when editing a file, you end up putting blanks at the end
  of the line, that you might miss. 

  One use for producing longer then 80 character records at a punch
  would be to include the stacker information at the end of the record.
  The deck could then be read directly back in without manual editing. 

  I am going to be adding card reader/card punch support to my KA10
  simulator soon now and wanted to get some feedback on how to handle
  this.

Rich

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Richard Cornwell
skyvis at sky-visions.com
http://sky-visions.com
LinkedIn:   https://www.linkedin.com/in/richard-cornwell-991076107
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