Re: Serial Link between Mac and IIgs

[Hugh Hood <hughhood@earthlink.net>]

Craig,

I suspect your bottleneck is either:

(i) Zterm on the Mac being too slow; or,

(ii) lack of a hardware handshaking RTS/CTS cable between the Keyspan
adapter and your IIGS serial port.



I _daily_ transfer files between my IIGS (ROM3/ZipGSX732) and my PowerMac G4
using ProTERM 3.1 over the serial connection, and have NO problem doing
errorless 57,600K zmodem transfers with the stock ProTERM 3.1 driver, or
115,200K errorless zmodem transfers with the custom ProTERM driver (actually
a 'patch' macro) that I developed with help from David Wilson, David Empson
and David Schmidt.

{Now, I don't use Zterm. I don't even have to fire up a separate 'comm'
program on the Mac. The unix programs rz and sz take care of everything
behind the scenes, with the Apple II running the show.

Setting up your IIGS to act as a unix serial terminal to the Mac is a fairly
involved process that requires some effort, but yields impressive results. I
wrote an exhaustive article about it several months ago, called "Apple II to
Mac Intelligent Serial Terminal File Transfers" and some day, someone might
decide to publish it. Right Ken? Right Sean? <grin>}

Check out the ProTERM manual (Tony's site) for help setting up your hardware
handshaking cable. 

<http://lostclassics.apple2.info/downloads/?dl_cat=10>

His forum also has my 115,600K baud patch macro.
 
<http://16sector.com/forum/proterm-v31-community-support/proterm-macro-for-1
15200-baud-support/page-1/post-36/#p36>

Hugh Hood







in article 
9947cafe-8aa2-4e4d-8558-b85b99a6424a@r19g2000yqb.googlegroups.com, oz390gta
at oz390gta@gmail.com wrote on 1/18/10 4:29 AM:

> I have been trying to set up a stable/fast serial link between my IIgs
> (ROM03) and my MacPro with a Keyspan USB to serial adapter. This
> connection works fine with ADTPro and it is quite quick at 115200
> kbps. When I try a serial link with ProTerm on the GS and zterm on my
> Mac I can not get a reliable connection above 9600 kbps. I ideally
> want to transfer files between the machines at a half decent speed in
> SHK format so I am not stuck with having to convert SHK to DSK or 2mg
> files before sending them via ADTPro.
> 
>  Am I using the right software? The hardware seems OK as it works with
> ADTPro. Am I running into some limitations I don't know about?
> 
> oz390gta