Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!seismo!rutgers!ames!ptsfa!ihnp4!cuae2!killer!elg From: elg@killer.UUCP (Eric Green) Newsgroups: comp.sys.cbm Subject: Re: 1200 + Message-ID: <1197@killer.UUCP> Date: Sun, 26-Jul-87 17:18:39 EDT Article-I.D.: killer.1197 Posted: Sun Jul 26 17:18:39 1987 Date-Received: Tue, 28-Jul-87 02:29:11 EDT References: <3989@udenva.UUCP> Organization: Bayou Telecommunications Lines: 22 in article <3989@udenva.UUCP>, slindahl@udenva.UUCP (Steve "Mr. MBA" Lindahl) says: > My question is: Can a Commodore 64 handle anything above 1200 baud? The answer is "sort of". Just as WXMODEM or ZMODEM will only "sort of" work with the C64. From what I've heard, the C64 can't recieve at a sustained 2400 baud, however, can transmit at near that rate. Something about the VIC][ chip stealing too much time. Someone mentioned a 20% error rate in Xmodem transfers. By the way, what I'm talking about for WXMODEM or ZMODEM is that the C64 RS232 port apparently cannot recive characters at the same time that it is transmitting them. Since flow control is necessary while the reciever goes to save the last block to disk, unless you want to "fill the frame" (which eliminates much of the speed advantage of a windowing protocol), this effectively prohibits a WXMODEM or ZMODEM reciever for the C64. Be better to just adapt a version of YMODEM, which would transfer as fast over PCPursuit as a frame-filling ZMODEM, but without near the complexity of implementation.... -- Eric Green elg%usl.CSNET Ron Headrest: A President {cbosgd,ihnp4}!killer!elg for the Electronic Age! Snail Mail P.O. Box 92191 Lafayette, LA 70509 BBS phone #: 318-984-3854 300/1200 baud