Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!cs.utexas.edu!uunet!math.fu-berlin.de!tmpmbx!netmbx!hase From: hase@netmbx.UUCP (Hartmut Semken) Newsgroups: comp.sys.atari.st Subject: Re: above 19200 baud Message-ID: <2030@netmbx.UUCP> Date: 2 Mar 91 20:31:24 GMT References: <1991Feb11.053755.19095@ecst.csuchico.edu> <1991Feb11.151854.4860@bronze.ucs.indiana.ed Distribution: usa Organization: netmbx, Berlin, West Germany Lines: 23 szhu@tasha.poly.edu (A1 shu bin zhu (cs) ) writes: >Is there a way to set the serial port above 19200 baud on the ST? >The MFP chip can handle upto 56.2K baud, there must be a way. There is no way to do it in software: One of the timers in the MFP is used to generate the send and receive clock for the serial interface. Using the standard clock frequency and a pre-divider by four (this is necessary for async. operation) it can generate clocks up to 19200 Baud. The only way is to cut the send clock and receive clock input pins of the MFP an feed it with a new clock (from extra hardware). I planned to try it, but never found the time to do it... Try it out. You can still reverse the little hack and up with nothing more but some experience :) hase -- Hartmut Semken, Lupsteiner Weg 67, 1000 Berlin 37 hase@netmbx.UUCP Hi! (Zaphod Beeblebrox)