Pdf   BASIC Source Listings
  sym1_basic_source_listings.pdf - 21 pages, 2.5 MB
Pdf   Synertek BASIC Reference Manual (1978)
  sym1_basic_reference_manual_1978.pdf - 59 pages, 1.6 MB
Pdf   Synertek BASIC Reference Manual (1981)
  sym1_basic_reference_manual_1981.pdf - 65 pages, 3.9 MB