Re: new apple user help.

[spec@vax2.concordia.ca (Mitchell Spector)]

In article Erick Wagner <wagnere@netcom.com> writes...
>
>There have been several ROM revisions for the IIc.  Early versions
>had bugs which caused problems with high-speed communications (I
>think anything about 2400bps).
>
>Newer ROM versions solved that problem but the IIc/IIc+ serial ports
>do not provide true hardware handshaking and this will probably
>cause problems at rates above 9600bps.

   The IIc serial port problem has absolutely nothing to do with the 
ROM firmware, it was caused by a hardware component on the motherboard.
Apple IIc's produced between April 1984 (introduction date) and
around November 1984 used a 74LS161 instead of an oscillator, which
offset timing by about 3%. This may cause modems higher than 300 baud
to not function properly (as I mentioned in an earlier post, this can
vary between brands and models. You may get lucky with your particular
modem and not run into this problem).

Mitchell Spector
spec@vax2.concordia.ca