Re: IIGS 115,200 Baud Serial Port - How?

[Hugh Hood <hughhood@earthlink.net>]

in article 1it0w2m.1iss9i91cybozkN%dempson@actrix.gen.nz, David Empson at
dempson@actrix.gen.nz wrote on 1/3/09 7:47 PM:

> 
> I haven't experimented with these high baud rates, and I wouldn't expect
> the IIgs to be able to keep up with 230400 async data even with an
> accelerator. 115200 is more likely to be achievable.
> 

David,

You're right. I went ahead and patched ProTERM for 230400 baud (3.6864 MHz /
16) and was unable to make a satisfactory connection.

So, 115200 baud does appear to be the IIGS max for async comm on its
built-in ports.

Also, concerning the ProTERM patches I previously mentioned, I now think a
more elegant solution may be for me just to write a ProTERM global macro
using the 'MEM' command to poke in the patches after the program has loaded.

If I couple this with some memory peeking and the right macro logic, I think
a user then could toggle back and forth between the patched 115200 baud rate
code and the unpatched 110 - 57600 baud code fairly effortlessly, and not
have to keep (2) copies of ProTERM on his/her drive.

Hugh Hood...