EPE VSCOPE 02APR98 Since publishing the EPE VSCOPE it turns out that only QuickBASIC needs to be loaded with the command QB/L. The /L loads QuickBASIC's library routine which allows the use of machine code alongside Basic. The more recent QBasic has this facility built in and does not need /L, instead it should be loaded with the usual QB or QBasic command. A number of Net users are not downloading all the required files and are finding problems with VSCOPE.BAS halting through failing to find the machine code files. Ensure that you download all six files and that they are all held in the same directory as your QuickBASIC or QBasic. Some readers may not have a separate QBasic directory, their Basic being held in DOS, in this case copy the VScope files into DOS. The files are: VSCOPE.BAS, VSCOPEDG.COM, VSCOPEMS.COM, VSCOPEDG.J, VSCOPEMS.J, MOUSE01.BAS The latter was introduced after publication of the project and not discussed in the text. It allows the Mouse operation to be checked independently of VSCOPE.BAS, but note that it accesses VSCOPEMS.COM for its machine code.