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From: rond@pro-grouch.cts.com (Ron Dippold)
Newsgroups: comp.sys.apple2
Subject: Re: PCT & File Transfers
Message-ID: <3119.apple.net2@pro-grouch>
Date: 15 Jul 90 06:20:42 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 30

In-Reply-To: message from lhaider@pro-beagle.cts.com

> I'm having trouble getting the PCTransporter to do file transfers. 
> It seems that the PCT can't effectively handle disk access while 
> downloading files. ZModem is the only protocol that can handle 
> downloading, but at a 50% error and resend rate.  Is there a way 
> to prevent this?  Is this like everyone else's PCT?   

Mine works just fine.  There are a couple things you could look into:

*  Check your version of ZMODEM.  Ideally, you should have a protocol that
   will receive a lot of the file to RAM and _then_ write it out to the
   disk, so you may get an error on the block it was sending during the
   write, but that should only occur every 500 blocks or so.
 
* Check your modem settings in the control panel.  What's happening is that
  the // is handling all I/O, including the modem and disk, and it has to
  turn off interrupts to do disk access.  It does work with me, however.
  You didn't mention the speed of your modem.  Some modems have buffers, so 
  they can recieve several characters while the computer is doing other stuff
  and you can grab them all when the disk access is done.  At 9600 baud, the
  number of characters recieved might be too many.

Anyway, I'm recieving at 2400 baud to an AppleDisk 3.5 from a DataLink Express
through the IIgs modem port with no problems using Telix.  I think your best
bet is the first option.

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