Statements:
PRINT expr[, ;]expr[, ;]...
GOTO linenum
GOSUB linenum
RETURN
END
LET var=expr
var=expr
INPUT ["prompt",]var[,var[,var...]]
REM remark
IF expr [= <> < > <= >=] expr [THEN] statement
POKE addr,value
DPOKE addr,value
USR(addr [,value [,value]])
OUT port,value
PLOT x,y
CLS

Functions (useable in expressions)
PEEK(addr)
DPEEK(addr)
USR(addr [,value [,value]])
FRE()
INP(port)
FLG(flag)
RND(range)


Variables:
A through Z 16-bit signed integer variables


Notes:
A space is required after line numbers

No check is done to see if line numbers are in order, lines will be compiled
in the order they exist in the source file

Multiple statements may be placed on a line, separated with a colon (:)

Both GOTO and GOSUB support computed jumps, so you could do GOTO A*1000 and 
if A containd 5, for example, an attempt would be made to jump to line 5000.
If the jump target does not exist then an error will be printed and the program
will terminate.


TBC [options] filename

-L   - show program listing
-H   - halt on errors