Path: utzoo!utgpu!watmath!isishq!f171.n221.z1.FIDONET.ORG!izot
From: izot@f171.n221.z1.FIDONET.ORG (Geoffrey Welsh)
Newsgroups: comp.sys.cbm
Subject: Re: Zmodem on commodores?
Message-ID: <1573.23F37816@isishq.FIDONET.ORG>
Date: 6 Feb 89 23:18:03 GMT
Sender: ufgate@isishq.FIDONET.ORG (newsout1.25)
Organization: FidoNet node 1:221/171 - Izot's Swamp, Kitchener ON
Lines: 37


 > From: elg@killer.DALLAS.TX.US (Eric Green)
 > Message-ID: <7050@killer.DALLAS.TX.US>
 
 > Solvable. Zmodem allows flow control. Do a control-S, wait until the
 > flow of characters in stops, then do your DMA. Send a control-Q, then
 > restart.
 
   Not all implementations implement that properly.
 
 > One problem is that the regular RS232 routines have trouble sending
 > and recieving at the same time, so sending a control-S could barfle an
 > incoming character....
 
   Since we're writing fancy code, a decent RS-232 driver (which would solve 
that problem completely on a C64 doing 2400 bps) would be no problem.
 
 > > Second, one could not download files larger than {128K, 256K, 512K}.
 >
 > Is that really a limitation? I rarely see files bigger than 300 blocks
 > (half a 1541), because most people use ARC or LYNX with a single
 > 1541 drive and couldn't de-archive anything bigger than 80K.
 
   Speak for yourself! When I was still using my CBM 8-bit stuff, I never had 
a computer that wasn't connected to at least one 1-meg drive (SFD, 8250). 1581 
offers nearly that, and 8050 (like Joe Greco uses) offers a comfortable 1/2 
meg. Any CBM hacker interested in top-notch performance threw his 1541 into a 
corner (if not out the window) long ago.
 
   Geoff ( watmath!isishq!izot )
 


--  
 Geoffrey Welsh - via FidoNet node 1:221/162
     UUCP: ...!watmath!isishq!171!izot
 Internet: izot@f171.n221.z1.FIDONET.ORG