Re: Cocoa-dev Digest, Vol 5, Issue 919
Re: Cocoa-dev Digest, Vol 5, Issue 919
- Subject: Re: Cocoa-dev Digest, Vol 5, Issue 919
- From: Graham Cox <email@hidden>
- Date: Tue, 27 May 2008 23:31:41 +1000
On 27 May 2008, at 5:37 pm, Graham Cox wrote:
During my fellowship I wrote a real-time data acquisition app in
6502 assembler that used a custom circuit board that served as a
Schmidt trigger to clean up a square wave from the cardiotachometer
we used.
While that may sound impressive to some, this is almost identical to a
project I was given as an assignment as a first-year undergraduate.
Schmidt triggers are uncomplicated circuits (you can get four of them
in a 4093 chip anyway).
Those of use who are slightly too young to have grown up with
minicomputers and cut our teeth instead on first-gen home micros, ate,
slept and breathed 6502 assembler, as it was the only option for
getting any performance out of those machines. I also home-brewed a
digital oscilloscope from a KIM-1 so real-time data acquisition with a
6502? Been there, done that. Have to admit it wasn't very good as the
1MHz processor speed did somewhat limit its bandwidth... but it worked.
G.
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