I have patched a copy of GW-BASIC to get rid of some bugs and add the new features described and documented in the NewBASIC.txt text file. The patched BASIC (NBASIC.EXE) is inside this .chm file, NBASIC.EXE.
Note: My NBASIC.EXE is totally unrelated to another BASIC interpreter also called "NBASIC", available at:
Visitors to this page are encouraged to copy the information above and make it available to others as long as credit is given for the source. I'm not getting any younger and would hate to have the information lost forever if I should unexpectedly drop dead next week, month, year, decade or century.