espen@well.UUCP (Peter Espen) (01/23/87)
I am trying to set up communications between a stand alone 68000 contlled board with standard RS232 serial ports and my 520ST. I have everything setup and communicating, however I need to be able to hold off the stand-alone board via hardware/DTR hardware handshaking andf apparently the atari 520ST only supports XON/XOFF software handshaking on the serial ports. Does anyone know of a patch/fix/mod to the Atari operating system that will allow hardware handshaking control of the serial ports? A serial port is NOT really standard RS232 unless it can do this. Are there any terminal programs that anyone knows of that control the 520ST serial port's handshaking in hardware? Any help will be greatly appreciated, of course! Peter Espen (espen@well) hardware?
jdn@homxc.UUCP (01/27/87)
In article <2453@well.UUCP>, espen@well.UUCP (Peter Espen) writes: > > I am trying to set up communications between a stand alone > 68000 contlled board with standard RS232 serial ports and my 520ST. > I have everything setup and communicating, however I need to be able to > hold off the stand-alone board via hardware/DTR hardware handshaking andf > apparently the atari 520ST only supports XON/XOFF software handshaking > on the serial ports. I think you should have no trouble supporting hardware handshaking. Take a look at the Rsconf() call. Jonathan Nagy {ihnp4|harvard|allegra|seismo}!homxc!jdn
henry@utzoo.UUCP (Henry Spencer) (02/01/87)
> ... hardware handshaking control of the serial ports? A serial > port is NOT really standard RS232 unless it can do this... Um, I hate to point this out, but the RS232 standard -- yes, there really is one, although almost nobody in the microcomputer world seems to have bothered to read it -- has *NO* hardware handshaking. None. Zero. The lines that look like they might be for hardware handshaking, notably CTS, RTS, DSR, and DTR, are in fact for other purposes entirely. Try hooking up your hardware-handshaking device to a modem and you'll discover this very quickly; modems are what RS232 was originally built for, and modems are still the closest things to true RS232-standard devices. I can sympathize with a desire for hardware handshaking, and I agree that it's (a) common and (b) useful, but it is not "standard" in any precise sense of the word. -- Legalize Henry Spencer @ U of Toronto Zoology freedom! {allegra,ihnp4,decvax,pyramid}!utzoo!henry