It's a good question. With only Google as my guide (I'm admittedly no Apple expert!) it appears that Apple introduced a display refresh signal with the IIc model (50 or 60 Hz, depending on settings) and a true real time clock beginning with the IIgs. Since the Laser is apparently a IIc clone, perhaps it's using the display clock? -Glenn Sent from my iPhone
On May 24, 2017, at 10:10 AM, Evan Koblentz via vcf-midatlantic <vcf-midatlantic@lists.vintagecomputerfederation.org> wrote:
Thanks everyone. Interesting stuff.
Here's something I do not understand. Lego's modified version of Logo has a command, COUNTER, which they say increments in tenths of a second. One of their sample programs runs the counter to 600 to give you a minute of something happening (a motor spinning). I didn't time it against a real clock, but, how could this work? The same Logo environment disk runs identically in anything from a ][+ through a GS. (My demo uses a Laser 128 as you'll recall.)