alex.freed.007{at}gmail.com wrote:
> On Jan 15, 4:32 am, Steven Hirsch  wrote:
>> There were definite speed limitations when using the host computer's serial
>> interface, so don't expect it work fast than 9600 baud.
> 
> Well, I don't think the (affordable) modems at the time were very
> fast. I probably
> bought anything faster than 2400 baud no earlier than 1989.
> Clearly having to go through the z806502 channel for every
> character sent
> or received was not very fast.

The ring-buffer driver was interrupt driven and held 256 characters on the 
Apple side for programmed retrieval.  I _think_ I was able to get 9600 baud 
file transfers using that arrangement.  In terminal mode, 2400 was the limit 
without character loss.  There, you took the overhead in both directions since 
the displayed text had to go back over the interface with each character received.
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