Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!zaphod.mps.ohio-state.edu!hobbes.physics.uiowa.edu!maverick.ksu.ksu.edu!unlinfo.unl.edu!nolan From: nolan@helios.unl.edu (Michael Nolan) Newsgroups: comp.dcom.modems Subject: Re: Over 1000 cps with PEP? Message-ID: Date: 23 Jun 91 01:52:25 GMT References: <244.2861EA83@zswamp.uucp> <1991Jun23.010337.2949@omen.COM> Sender: news@unlinfo.unl.edu Reply-To: nolan@helios.unl.edu Organization: University of Nebraska - Lincoln Lines: 19 Nntp-Posting-Host: helios.unl.edu caf@omen.COM (Chuck Forsberg WA7KGX) writes: >In article <244.2861EA83@zswamp.uucp> root@zswamp.uucp (Geoffrey Welsh) writes: >-3) XMODEM is a slow protocol, period... and few programmers bother to code it >-very efficiently as a result. In fact, even at 115,200 bps over a null modem, >-I have not been able to reach 1000 CPS with XMODEM! >Depends on the computers and the software. A pair of DOS machines running >ZCOMM or Pro-YAM get up to 4000 CPS using xmodem-crc. (1359 sending to an >XT equivalent). Using 1k blocks raises the 4000 to over 9000 CPS. I get about 1800cps on a 19200 hard-wired connection between my unix system and a 20mhz '386 PC. X/Y/Zmodem run at pretty much the same speed on this setup, too, with Zmodem being just a little bit faster than Ymodem, which is just a little bit faser than Xmodem. ------- Michael Nolan This is my .sig Internet: nolan@helios.unl.edu T*His_iS#MY%.SIg oN DrUGs!@%#@% UUCP: tssi!nolan Any questions?