[dev kernel, will check stable shortly]
It was brought to my attention by Eric that in config.sys read() returns
an unsigned count or 0xFFFF on error but we were checking as though it
returned a signed value (-1 or less than requested count). I committed
the change that makes these tests check instead for != requested count
(ie less than requested count or 0xFFFF; also greater than requested
count is an error, but can only be seen if the kernel is already corrupted).
I also committed some code lying around in my tree, it is very simple
code that allows DebugPrintfs to be sent to a COM port (hard coded as to
which one, so a recompile is needed if you want to use another one).
Note really the most robust stuff, but works well for debugging apps
that don't mess with the serial ports. All conditional, so won't show
up unles explicitly requested, also I think its OW only.
Jeremy
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