[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: where can i download the various OS's for my GS?

Jeff Blakeney wrote:

  To: Michael J. Mahon
On Wed, 23 Apr 2008 20:50:21 -0700, Michael J. Mahon wrote:



Michael Kent wrote:


The modem port will do up to 19,200 bps through the firmware, 57,600 bps
with a hardware handshaking cable, and up to 115,000 bps through AppleTalk.

Not bad for out-of-the-box 1986 hardware, if I do say so myself.  :-)


Just like the 1981 SSC based on the 6551.  ;-)

The fact that the IIgs will do 115kbits/sec with Appletalk suggests
that with some driver work it would do 115kbits/sec with RS-422/RS-232
as well.



Appletalk actually runs in synchronous mode at a rate of 230,400 bps.
The ADT guys apparently have both the Super Serial Card and the IIgs
Serial Port running in asynchronous mode at 115,200 bps but I haven't
tried that yet.


It's just a matter of 1) setting the 6551 config register to use
the undivided clock, and 2) using a polling loop to capture the
incoming data to meet the tight timing constraints.

-michael

NadaPong: Network game demo for Apple II computers!
Home page:  http://members.aol.com/MJMahon/

"The wastebasket is our most important design
tool--and it's seriously underused."