Daniel Robbins hired by M$

[Peter]

On Tue, 14 Jun 2005, Henry Spencer wrote:

> On Tue, 14 Jun 2005, D. Hugh Redelmeier wrote:
>> I'm actually more impressed by the PDP-8 LISP that I have in paper
>> tape...
>> I guess reading these tapes by eye might actually be practical.
>
> The modern way to read them, obviously, is to *scan* them (against a
> background sheet of contrasting color) -- 25cm at a time if you don't want
> to cut them up -- and process the images to recover the bits.  Probably
> wouldn't even be terribly hard, actually.

Unless you have registration errors on a long run of undistinguishable 
data (01010...)

It is trivial to build a slow reader using a parallel port interface a 
stepper and some optoelectronic parts. I wanted to make such a device 
but I do not have an incentive (not owning any paper tape).

Peter
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