On 4/23/2016 6:53 PM, Dale E Sterner wrote: > The copy command is limited to what you set the mode command to. > FREEDOS lets you set the baud very high but other dos's and > even windows has 9600 baud as the upper limit, well below > the uarts top speed. > If I type copy filename.prn com1: in any other dos besides FREEDOS > its top transmission speed is 9600. Any graphics file would take a few > minutes at that speed. Text file are ok at 9600 but pictures take > forever. > Terminal software like xtalk only send text files at high speeds. > For photos you need the dos copy command. Sorry, but all of this is NOT correct. Once again, nothing in DOS limits how high you set the UART speed, and certainly nothing in Windows.
I have been using serial devices (not USB) with 115k baud for decades, likewise transferred non-text files over serial connections for that long as well, even using such antic dinosaurs like Kermit to transfer programs (executables) as well as graphics between MS-DOS and other systems like Unix SysV or Atari 520, because I had only BBS access (this was before there was what today is called an "Internet") on my MS-DOS (later Windows 3.11) system. At work back in the late '80s/early'90s (CAD software company) we were running serial connected plotters at 56K and 115k baud, pretty much all of our digitizer tablets ran at 38.4k baud. And I had one of the first modems running at 56K baud when the standard was still 28.8K or 33.6K. All in DOS... If you set the baud rate with the FreeDOS mode command, on any DOS, a copy command will work, however, there is no handshake, no error correction, so you need to have a 100% working serial connection to have that working. A copy to COM[1,2] otherwise will work at whatever the speed of the UART is set to. Ralf --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ------------------------------------------------------------------------------ Find and fix application performance issues faster with Applications Manager Applications Manager provides deep performance insights into multiple tiers of your business applications. It resolves application problems quickly and reduces your MTTR. Get your free trial! https://ad.doubleclick.net/ddm/clk/302982198;130105516;z _______________________________________________ Freedos-user mailing list Freedos-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-user
