[Coco] Light pen stuff was:Re: Software testing for FDC emulator

[Steve Bjork]

No, my driver was for basic programs and not games.  Mostly used as a 
"select from a menu" type operations.  It only need to find what 
character the pen is pointing at.  Any yes, I can find what character on 
the the pen pointing to in 1/10 of second.

Yes, it was CPU intensive.  Yes, it did flash the screen.  But it was 
cheap $20 input device that used the screen.  (The days before a mouse.)

But back then everything was CPU intensive.

You must be an electrical engineer since you used term "phase locked 
loop" to describe an programming technique.  Am I right?

Steve

On 4/26/2011 11:20 AM, gene heskett wrote:
> On Tuesday, April 26, 2011 02:09:34 PM Steve Bjork did opine:
>
>> Last time I checked,  1/10 of a second is 100 milliseconds, not 10
>> milliseconds.
>>
>> This is how I get in trouble.  They misquoted me!
> In this case, I was running on my electronics autopilot, one of those cases
> where my brain is running several sentences ahead of the fingers, and I
> miss-quoted you.  My apologies.
>
> However, 10ms vs 100 ms still isn't long enough to reliably obtain the
> pixel being pointed at unless you are actually playing phase locked loop
> games, which are both cpu intensive, and the flashing of the screen pixels
> would be a dead giveaway for proper aim by the gamer, not good.
>
> To play phased locked loop and continuously track it once it has been
> acquired would only need a 9 pixel pattern.  That could be done in 100
> milliseconds if the lcd itself was fast enough.  Some of the first ones
> weren't that fast.
>
>> Steve (often misquoted) Bjork