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Re: debugging without C_DEBUG (debug light?)

dosbox surely isn't suited for that, anyways if you care you should maybe start off with Normal_Loop() in dosbox.cpp where part of the ticks handling (that triggers the "external" events like timer irq) is located. Setting up some auto-loading ([autoexec] section of dosbox.conf) along with disabling …

Re: debugging without C_DEBUG (debug light?)

What type of application? Usually you're better off logging things like interrupts (CPU_Interrupt() in cpu.cpp) and dos calls (DOS_21Handler() in dos.cpp) which don't depend on timing. That way you might be able to pinpoint some area of interest, like "after file open but before file read" or " …

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