I have a Model 4P running LS-DOS 6.3.1. I set up serial communications between the 4P and my desktop. On the desktop, I run TeraTerm. My problem is, that once I establish communications UPPER case and lower case both work UNTIL I do something on the 4P that causes the "LS-DOS Ready " prompt. After that, all lower case characters that sent to my desktop are converted to extended ascii characters. The problem is repeatable. If I re-start my terminal program on the desktop, everything is normal UNTIL the LS-DOS Ready prompt on the 4P displays. Thinking I had a problem with TeraTerm, I dug out an old laptop running Win-98 and Hyperterm. Although the extended ascii symbols that are displayed instead of the lower case characters are slightly different, the symptoms are the same. Problem is somehow within the 4P. I then dug out a backup disk of LS-DOS thinking that something had garbled a data bit on the working disk. Results are the same. I've tried different baud rates with no change in the problem. I used "SETCOM (DEFAULD) on the 4P and reset the port on my desktop and still had the same problem. I used the "DEBUG" feature of TeraTerm to observe the HEX data stream during receiving the "LS-DOS Ready" and saw no abnormalities. I'm ready to pull my hair out and am looking for suggestion.
I should add, I use Link *ki *cl and Link *do *cl to establish the tie between the 4P and the desktop.
I should add, I use Link *ki *cl and Link *do *cl to establish the tie between the 4P and the desktop.
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