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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><!-- Trouble under MS-DOS --><HTML><HEAD><TITLE>Trouble under MS-DOS</TITLE><META HTTP-EQUIV="content-type" CONTENT="text/html; charset=iso-8859-1"></HEAD><BODY BACKGROUND="spiral.gif" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#990099" ALINK="#FF0000"><TABLE WIDTH="98%"><TR><TD WIDTH=60 VALIGN=BOTTOM NOWRAP><IMG SRC="transp.gif" ALT="" WIDTH=60 HEIGHT=20></TD><TD><!-- Ab hier Seitentext: --><P><BIG><BR><STRONG><U>IV.2 Trouble under MS-DOS</U></STRONG></BIG></P><P><BIG>These are problems that are specific to DOS-based host platforms, includingWindows <NOBR>3.1x</NOBR>. Most of it also applies to Windows 9x systems.</BIG></P><P><BIG><OL TYPE=1><LI>When initializing the serial port, the DOS <STRONG>MODE</STRONG> utility aborts with an error message like: "function not supported on this computer", or "invalid parameter", or something like that.<BR> On most PCs, the BIOS doesn't support baudrates greater than 9600 Baud. <STRONG>MODE</STRONG> itself doesn't support baudrates greater than 19200 Baud. However, most terminal emulation programs can operate at baudrates of up to 115200 Baud.<BR> </LI><LI>The <STRONG>RESET51</STRONG> program aborts with "port not found".<BR> The PC-BIOS didn't recognize the printer or serial port specified.<BR> Try another port or check your PC hardware.<BR> </LI><LI>The <STRONG>RESET51</STRONG> program aborts with "hardware failure".<BR> The PC-BIOS has recognized the specified port, but the data latch (printer port) or modem control register (serial port) doesn't work.<BR> Try another port, or check the defective port.<BR> </LI><LI>The PC hangs when data are sent over the serial interface in batch mode.<BR> The RS-232 cable may be plugged into the wrong COM-port.<BR> First of all, try the other ports.<BR> There may also something be wrong with the modem control signals.<BR> (See chapter <A HREF="bcables.htm">II.3 Tailoring the Cables</A>.)<BR> </LI><LI>It works in interactive mode, but the PC hangs, if data are sent in batch mode.<BR> There <STRONG><EM>is</EM></STRONG> something wrong with the modem control lines!<BR> Employ the <NOBR>BOOT-51</NOBR> User's Manual and check the RS-232 cable at the PC side connector.<BR> </LI><LI>When invoked, the <NOBR>MS-DOS</NOBR> <STRONG>MODE</STRONG> command hangs, or fails to change the previous baudrate, although it terminates without error.<BR> Remove all networking and communication drivers and TSR programs from your <NOBR><EM>CONFIG.SYS</EM></NOBR> and <NOBR><EM>AUTOEXEC.BAT</EM></NOBR> files, reboot, and try it again. There is plenty of quick'n dirty software, doing something strange with the BIOS interrupts!</LI></OL></BIG></P><!-- Seitentext Ende --><P><BR><BR><CENTER><TABLE WIDTH="70%"><TR><TH><A HREF="boot51.htm"><IMG SRC="home.gif" ALT="[contents]" BORDER=0 WIDTH=32 HEIGHT=32></A></TH> <TH><A HREF="btrouble.htm"><IMG SRC="up.gif" ALT="[up]" BORDER=0 WIDTH=32 HEIGHT=32></A></TH> <TH><A HREF="bgeneral.htm"><IMG SRC="back.gif" ALT="[back]" BORDER=0 WIDTH=32 HEIGHT=32></A></TH> <TH><A HREF="blinux.htm"><IMG SRC="next.gif" ALT="[next]" BORDER=0 WIDTH=32 HEIGHT=32></A></TH></TR></TABLE></CENTER></P></TD></TR></TABLE></BODY></HTML>⌨️ 快捷键说明
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