BASIC 1.0 is the standard BASIC language for Thomson computers (MO5, TO7, etc.), which is the reference for the entire range[1]. This is an implementation of Microsoft BASIC.
BASIC 1.0 interpreter recognizes the usual commands such as FOR..NEXT, GOSUB..RETURN, IF..THEN..ELSE, and DATA / READ / RESTORE statements.
Advanced instructions like ON..GOTO and ON..GOSUB were also possible.
It was used to introduce children from France to programming in the 1980s. Three languages were mainly taught: LSE, BASIC and LOGO. School textbooks programs were given in BASIC 1.0 for Thomson and sometimes in ExelBasic for the ExelvisionEXL 100.
BOX (x1,y1)-(x2,y2) - Draws a rectangle (the top left pixel is (0,0)
BOXF (x1,y1)-(x2,y2),color - Fills a rectangle with the given color (optional, if not given use the current pen color). Negative colors lead to filling with the requested color as the background one.
CLS - Clear screen
COLOR foreground,background - Change pen colors (parameters are optional)
CONSOLE
DELETE
END - Ends program execution
FOR v=s TO e STEP n - FOR loop, incrementing v by n each time until it reaches e. The STEP is optional (default is 1) and can be negative.
GOTO line - Jump to program line
IF a THEN statement ELSE statement - Conditions (the statement can be just a line number)
INPUT “message”;variable1,variable2 - Set variables to user-entered values (comma separated). A ? is printed after the message and before reading the values from the user.
LINE (x1,y1)-(x2,y2) - Draws a line (first point is optional, current cursor position is used: LINE -(x2,y2))
LIST line - List the program in memory (parameter is optional, if missing the whole program is listed)
LOCATE x,y - Move the cursor
NEW - New program, remove current one from memory
NEXT v - Closes FOR loop.
PLAY s$ - Plays music. The string is made of notes DO,RE,MI,FA,SO,LA,SI (with # and b modifiers), octave changes (O1-O5), note duration changes (L1-L96), silences (P), tempo changes (T1-T256), attack settings (A0-A255). Spaces are ignored and can be used for readability
PRINT value - Prints a value (if the value is suffixed with a ; insert a tabulation after it. else goes to next line)
PRINT USING
PSET(x,y) - Set a pixel
REM - Comments (REMark). Anything following this on the line is ignored.
RUN - run the program
SCREEN foreground,background,border - Changecolors for whole screen
COS(v)
INT(v)
INSTR
LEFT$(s$,n) - Get a substring of the N first chars of S
LEN(s$)
MID$
RIGHT$(s$,n) - Get a substring of the N last chars of S
