Problem starting BC.Exe in DOS 5.02

[mnrvovrfc]

We are trying to run certain .exe programs on a IBM 486 running DOS 5.02 to make sure they are backwards compatible. When attempting to compile an QBasic 4.5 program with BC.EXE we get the following error and would like to know how to solve it.: 

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runtime error R6002
- floating point not loaded

Note: This is not a Windows error and we have all the necessary drivers loaded.

You might have to seek out BASIC PDS v7.1 for this one, since that might offer an emulation of the math coprocessor.

But QB64 was never meant to work for MS-DOS. At one time Galleon and his friends wanted it to work for Windows98 but not any earlier. Only Freebasic could help you but it requires a 32-bit extended memory emulation. For some people with ancient PC's like that it's too much hassle to set things up, because Freebasic cannot create 16-bit executables, cannot even create the "protected mode" executables like PDS could that were preferred by Windows v3 and by OS/2.