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Q38317: CodeView Gives "Illegal Instruction" on Clone 386 |
/pubs/pc/reference/microsoft/kb/Q38317/ |
Article: Q38317
Version(s): 2.20
Operating System: MS-DOS
Flags: ENDUSER | CV
Last Modified: 23-NOV-1988
Some clones that are not entirely IBM-compatible under CodeView may
give an "illegal instruction" message upon executing Go (F5), and then
hang, requiring a warm boot. If the instruction being called illegal
is FINIT or FNINIT, the particular ROM BIOS probably has a built-in
387 emulator. Either turn off the emulator, or set the environment
variable SET NO87=(some string).