> I've run some software on Pentium 3 Tualatin S on FreeDOS and it's > getting an invalid opcode error. > > If anyone's wondering, the offending software is Contra and Quake 1.08 > (software renderer).
If you're getting the error with multiple unrelated programs, have you tried running Memtest86 or equivalent to confirm that your memory chips are working correctly? Failed RAM (or running it out of spec/overclocking it) can cause random bit flips which could lead to errors like this. As a side note, a bit flip may not be corrupting the code, it can also corrupt jump addresses which cause the CPU to jump to the wrong address and start executing data as if it were code. Cheers, Adam. _______________________________________________ Freedos-user mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freedos-user
