HIGHLEX -- "High Bit Lexfile".  Adds HIGH$ to BASIC.

Size: 57 bytes.

HIGH$ sets the high bit (bit 7) of every byte in its argument.  This
allows rapid replacement of a string with its video inverse (if you
have the HP-IL video interface) or custom character replacement (if
you are using CHARSET).

*** HIGHLEX ***
(31898) File Header
(318F2) 5C/64 HIGH$($)
(3192E) Next File Header