cbmbasic
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math error
I used
https://sourceforge.net/projects/cbmbasic/files/cbmbasic/1.0/
cbmbasic-1.0-win32.zip
P.S. please update the binary file, without excluding WinXP/Vista.
It's a problem with the precision of the "9 digit" (40 bit) floating point library that is part of Microsoft BASIC for 6502. It reproduces on all 8 bit versions of Microsoft BASIC.