XTAL BASIC Extra

by David Elliott

Here are six more commands tor Crystal Basic 2.2. OLD recovers a program which has been ‘exterminated’ by a NEW or a cold start. STRING$(nn,​cc) creates a string of nn characters with ASCII code cc. LOWER$(..) and UPPER$(..) convert a given string to lower and upper case respectively, while REVERSE$(..) changes the case of the characters in a string. Finally, EVAL(…) returns the value of a given string. The assembler listing of the commands is followed by the code to be entered using the loader program described in the last issue.