I have a Windows 7 Host and a Windows XP Guest. My application on the XP guest 
runs in MSDOS mode (c:\windows\system32\command.com). It accesses the 8250 
directly (i.e. it does not use int 10). It has been running since the early 
90's on DOS6.22 and on Windows XP. I am using HyperTerminal at the host end to 
communicate with the application.

I am now trying to get it to use the named pipe also with HyperTerminal on the 
host end. I have been successful using a named pipe with VmWare but I can't get 
Virtual Box to output readable text. 

The guest end (MSDOS application) does receive input correctly when I type into 
HyperTerminal. The guest end (MSDOS) echoes characters that are typed at the 
host end (HyperTerminal) and those characters display in HyperTerminal 
correctly but full lines display as garbage. The app uses 7E1 at 57600 BAUD. If 
I use HyperTerminal through pipe to HyperTerminal, it works (but then that is 
only at my typing speed).


Does anyone know what is going on?


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