fdconfig.sys SHELL=4debug.com will try to load debug.com
Closed this issue · 3 comments
With a file named 4debug.com on the boot drive and shell=4debug.com in the fdconfig.sys file, the following interaction happens at boot time:
Bad or missing Command Interpreter: debug.com
Enter the full shell command line: 4debug.com
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As seen, entering the full filename including the leading digit does allow to load the shell. But the kernel first tries to load the shell with the digit stripped. Using a name like ldebug.com without the leading digit works as expected.
If I recall, this was first reported on one of the mailing lists by a user trying to load 4DOS. I can't look that up right now however.
I suspect that the digit is read or discarded like a menu selector digit. I have not studied this in detail however. It doesn't explain why the shell= line does take effect even though it processes the 4 however.
Workaround: Insert a backslash, which has no effect but will avoid this problem.
The original report was actually on our forum, https://www.bttr-software.de/forum/forum_entry.php?id=21218
fixed by pr#129