Programs written for and executed with UNIX versions of the runtime up to and including Version 2.4.0 use hex values 1-8 to display line drawing characters on the screen. Runtimes after Version 2.4.0 use hex values offset by one (1). When older programs are used with runtimes released after Version 2.4.0, line drawing characters do not display as expected. To use the old values for line drawing characters, set this variable to 1 (on, true, yes).
If the variable is set to 0 (off, false, no) or is not set at all, the runtime will use the newer offset values. This variable works only for UNIX systems.