Re: [TUHS] Spacewar at Bell Labs

[Clem Cole <clemc@ccc.com>]

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I built a paper tape reader at one point, lord knows were it is. It's
pretty easy -- Two pieces of wood to hold the paper with a mm or 2 shaved
off the bottom of one of them the width of the paper tape. Then 9 parallel
holes and put optical transistors connected to a 5 volt supply via a series
resistor, running into a parallel port the 4th one is used as a strobe to
pick of the 8 data bits and small light bulb on the other piece of wood.
 You then just pull it through and its self strobing.   Set up a cat <
/dev/parallel > /tmp/foo
Your basically done, you'll need to pick reasonable values for the
resistors to that match your transistors to switch on/off if the light
passed through the hole.  I've forgotten what I used, it something I had in
the parts box.





On Tue, Jan 14, 2020 at 12:16 PM Lars Brinkhoff <lars@nocrew.org> wrote:

> Jon Steinhart wrote:
> > I have a copy of double-sun space war (sorry, just the binary) for the
> > PDP-15/GRIN-2 on DEC fan-fold paper tape with the boot loader written
> > in octal on the leader.  Not sure if it's of any use
>
> I'm very interested in this!  Is the paper tape readable somehow?
>

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