Re: Apple2 keyboard connector pinout

[arturj@interaccess.com (Artur Jasowicz)]

James P. Meyer (jimbob@acpub.duke.edu) wrote:
: On 27 Oct 1996, Artur Jasowicz wrote:
: 
: > I wonder if you (or anyone) know how keyboard knows when to send next 
: > keystroke.
: 
: 	My WAG is that the buffer is inside the apple and not the 
: keyboard.  There is a lot going on in there.  Just because it *looks* 
: like the computer is busy with the disk drive, it doesn't mean it isn't 
: doing *bunches* of other stuff.  Like video display, RAM refresh cycles, 
: and keyboard input buffering.  The CPU services each one in turn fast 
: enough to make it seem that it's all happening at once.

That's true, CPU should be able to handle such little things, but mine 
doesn't. If I start shooting keystrokes at it while it is busy doing other
things, the CPU just misses these keystrokes. The echo never shows on 
screen and nothing happens. Or worse, if I press "page down" while in 
Turbo Pascal in CP/M mode before previous "page down" finishes redrawing, 
then usually my apple thinks that I've just pressed "delete" a few times. 
I had to correct many lines because of that.
It's been over 5 years since I've used that keyboard with 6800 in it, so 
I might be wrong, but it seems that it never missed a keystroke. Then 
again maybe my clone is slightly diferent from real Apple in this aspect...

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