** VIC-20 related documentation

super-expander/
  VIC Super Expander, a 3k RAM expansion plus an BASIC extension

vic20-programmers-reference-guide-1.1.txt.gz
  Commodore VIC 20 Programmer's Reference Guide.
  Converted to etext by Asbjørn Djupdal (djupdal@stud.ntnu.no) et al.
  Etext version 1.1; some errors corrected.

