Microsoft Basic 1.0
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 Exelvision EXL 100.
Keywords[2]
- ? - Alias to PRINT
- ' - Alias to REM
- ATTRB - Character attributes
- 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
- RND - Random value between 0 and 1
- SIN(v)
- STR$
- VAL
- + - Addition, string concatenation*-
- /
- MOD
- @ - Integer division
- = - Assignment, equality
- ^
References
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