TINY BASIC

History

The language was first developed solely as a standards document, written primarily by Dennis Allison, a member of the Computer Science faculty at Stanford University. He was urged to create the standard by Bob Albrecht of the Homebrew Computer Club. He had seen BASIC on minicomputers, and felt it would be the perfect match for new machines like the MITS Altair 8800 which had just been released in 1975.

statement ::= PRINT expr-list |
                     IF expression relop expression THEN statement |
                     GOTO expression
                     INPUT var-list
                     LET var = expression
                     GOSUB expression
                     RETURN
                     CLEAR
                     LIST
                     RUN
                     END

expr-list ::= (string | expression) (, (string | expression) * )

var-list ::= var (, var)*

expression ::= (+ | - | epsilon ) term (( + | -) term) *

term ::= factor  ( (* | / )  factor) *

factor ::= var | number | (expression)

var ::= A | B | C .... | Y | Z

number ::= digit digit *

digit ::= 0 | 1 | 2 | 3 | ... | 8 | 9

relop ::= < ( > | =  |    | epsilon )    |      > ( < | =  |  epsilon )   |   =

A BREAK from the console will interrupt execution of the program