I have a copy of the document "Product 359 BASIC INTERPRETER Design Specification - 30JUN80". In there following documents are referenced that I'd like to look into:   TI Extended BASIC Language Specification (June 30, 1980) Product 359 BASIC Subprogram Specification (June 30, 1980) Product 359 BASIC Sprite Specification (June 30, 1980) Product 359 BASIC Interpreter Expansion RAM Peripheral Support Software Specification (June 30, 1980) Product 359 BASIC