The directory indicates a single file, TPLSCR.4TH, on the disk. That file is just a single sector, containing nothing but spaces. What gives? If you dump the rest of the disk, you'll find it contains FORTH source code for a Tiny Pascal compiler. Comments there say TINY PASCAL WRITTEN BY THOMAS J. ZIMMER WITH COMPUCOLOR IMPLEMENTATION BY JAMES C. MINOR BASED ON THE BYTE MAGAZINE ARTICLES OF SEPT, OCT, and NOV OF 1978 THIS LANGUAGE'S OUTPUT IS FIG-FORTH OBJECT CODE THIS LISTING DATE: JANUARY 7TH 1981 + 3/28/81 UPDATE COMPUCOLOR LISTING: FEBRUARY 6, 1983 I'm not sure how this is loaded and executed, but chip_84.ccvf also has FORTH / Tiny Pascal code, so these are probably part of a set. The label on the disk was: TINY PASCAL COMPILER SOURCE SCREENS