BASIC:BASIC

BASIC

Tandy Color Computers contain a modular interpreter which understands a superset of the Beginner's All-purpose Symbolic Instruction Code (BASIC) programming language.

There are up to four core modules available in Read-Only Memory (ROM) that detect and link to each other when combinations of these ROMs exist in a Color Computer.

MODULES

Color BASIC - the core module present in all models of Color Computer

Extended Color BASIC (ECB) - a graphics and sound package which was optional in the Color Computer 1 and 2.

Disk Extended Color BASIC (DECB) - Disk commands present when a disk controller cartridge is plugged in

Super Extended Color BASIC (SECB) - Present in the Color Computer 3 only and includes Color BASIC and Extended Color BASIC in lower memory - links to Disk BASIC ROM if a cartridge is present.

KEYWORDS

BASIC Keywords (sortable)

Module	Keyword	Description
CB	ABS	Get absolute value of a signed number
CB	+	Addition operator
CB	AND	Boolean / Logical AND operator
CB	ASC	ASCII code of first letter of string
ECB	ATN	Returns arctangent in radians
SECB	ATTR	Set the display attributes of a high-resolution text screen
CB	AUDIO	Control the audio source
DECB	BACKUP	Duplicates the contents of the disk in the source drive on the disk in the destination drive
SECB	BRK	Jump to a line number when the BREAK key is pressed
SECB	BUTTON	Return if a Joystick Button is being pressed or not
CB	CHR$	Convert number to Control, ASCII, or graphics code string
ECB	CIRCLE	Draws a circle with center at point (x,y) radius r, specified color c and height/width ratio
CB	CLEAR	Clear RAM for string space
CB	CLOAD	Cassette load
CB	CLOSE	Close files
CB	CLS	Clear screen
SECB	CMP	Set palette to composite defaults
ECB	COLOR	Sets foreground and background color
CB	CONT	Continue the program from a stop
DECB	COPY	Copies the contents of filename1 to filename2
ECB	COS	Return cosine of an angle given in radians
CB	CSAVE	Cassette save
DECB	CVN	Convert a 5-byte coded string created by MKN$ back to the number it represents
CB	DATA	Store data within a program
ECB	DEF	Defines numeric function
ECB	DEL	Deletes program lines
CB	DIM	Set aside memory for arrays
DECB	DIR	Displays a directory of the disk in the drive you specify
CB	/	Division operator
ECB	DLOAD	Loads BASIC program at specified baud
DECB	DOS	With the OS-9 system diskette in drive 0, the DOS command boots the OS-9 operating system
ECB	DRAW	Draws a line beginning at specified starting point of specified length and color
DECB	DRIVE	Changes the default drive to the drive you specify
DECB	DSKI$	Inputs data from a particular sector with in a particular track on the disk in the drive you specify
DECB	DSKINI	Formats a disk in the drive you specify
DECB	DSKO$	Writes string data on sector, track, and drive number you specify
ECB	EDIT	Allows editing of program line
CB	END	The end of the program
CB	EOF	End of file
CB	ELSE	Alternate conditional statement
CB	=	Equality operator
SECB	ERLIN	Returns the BASIC line number where an error has occurred
SECB	ERR	Jump to a line number when an error occurs
SECB	ERRNO	Returns the BASIC error number for the error that has occurred
CB	EVAL	Evaluate a numeric expression
CB	EXEC	EXECute code at address
CB	EXP	Generates ?SN in Color BASIC, implemented in Extended Color BASIC
ECB	EXP	Returns natural exponential of number
DECB	FIELD	Organizes the space within a direct access buffer into fields
DECB	FILES	Tell the computer the number of buffers to reserve in memory
ECB	FIX	Returns truncated (whole number) value
CB	FOR	Start a loop
DECB	FREE	Returns to the number of free granules on the disk in the drive you specify
ECB	GET	Reads the graphic contents of a rectangle into an array for future use by PUT
CB	GO	Jump to line number
CB	>	Greater Than operator
SECB	HBUFF	Reserves an area in memory for high-resolution graphics
SECB	HCIRCLE	Draws a circle on the high-resolution graphics screen
SECB	HCLS	Clear the high-resolution graphics screen to a specified color
SECB	HCOLOR	Set foreground and background color on the high-resolution graphics screen
SECB	HDRAW	Draws on the high-resolution screen from a command string
ECB	HEX$	Computes hexadecimal value
SECB	HGET	Stores a rectangle from the high-resolution screen into a buffer
SECB	HLINE	Draws a line on the high-resolution graphics screen
SECB	HPAINT	Paints an area on the high-resolution graphics screen
SECB	HPOINT	Returns information on point x,y from the high-resolution graphics screen
SECB	HPRINT	Prints a message on the high-resolution graphics screen
SECB	HPUT	Copies graphics from a buffer to a rectangle on the high-resolution graphics screen
SECB	HRESET	Resets a point on the high-resolution graphics screen to the background color
SECB	HSCREEN	Select and clear high-resolution graphics screen
SECB	HSET	Set point x,y on the high-resolution graphics screen to color c
SECB	HSTAT	Returns information regarding the high-resolution text screen cursor
CB	IF	Start a conditional check
CB	INKEY$	Get a key
CB	INPUT	Read a line of text at a time
ECB	INSTR	Searches for the first occurrence of target string
CB	INT	Convert a number to an integer
CB	JOYSTK	Read and report joysticks
DECB	KILL	Deletes the filename you specify from the disk directory
CB	LEFT$	Left part of a string
CB	LEN	Length of a string
CB	<	Less Than operator
CB	LET	Assign a variable
ECB	LINE	Draw a line from (x1,y1) to (x2,y2)
CB	LIST	List program to screen
CB	LLIST	List program to printer
DECB	LOAD	Loads the specified program file into memory from disk
SECB	LOCATE	Move the high-resolution text screen cursor to position x,y
DECB	LOC	Returns the current record number of the buffer you specify
DECB	LOF	Returns the highest-numbered record of the buffer you specify
ECB	LOG	Returns natural logarithm
SECB	LPEEK	Return the contents of a virtual memory location $00000 - $7FFFF
SECB	LPOKE	Stores a value in a virtual memory location $00000 - $7FFFF
DECB	LSET	Left-justifies the data within the field you specify
CB	MEM	Free memory
DECB	MERGE	Loads the specified program file from disk and merges it with the program that exists in memory
CB	MID$	Middle of a string
DECB	MKN$	Convert a specified number into a 5-byte coded string for storage in a formatted disk file
CB	MOTOR	Tape drive motor control
CB	*	Multiplication operator
CB	NEW	Initialize the BASIC memory map
CB	NEXT	End of a loop
CB	NOT	Boolean / Logical negation
CB	OFF	AUDIO and MOTOR control token
CB	ON	Start of multi-way branch
CB	OPEN	Open a file
CB	OR	Boolean / Logical OR operator
ECB	PAINT	Paints graphic screen starting at a point (x,y) withh specified color c stopping at border b
SECB	PALETTE	Store a color code into a palette register, or reset palette for CMP or RGB defaults
ECB	PCLEAR	Reserves b number of 1.5K graphics memory pages
ECB	PCLS	Clears screen with specified color c
ECB	PCOPY	Copy graphics from source page to destination page
CB	PEEK	Read a value from a memory address
ECB	PLAY	Plays music of specific note, octave, note-length, tempo, pause
ECB	PMODE	Selections resolution and first memory page
CB	POINT	Check color of a semigraphics pixel
CB	POKE	Write a value to a memory address
ECB	POS	Returns current print position
ECB	PPOINT	Tests whether specified graphics cell is on or off
ECB	PRESET	Reset a point to background color
CB	PRINT	Write to the screen
ECB	PSET	Sets a specified point (x,y) to specified color c
ECB	PUT	Stores graphics from source into start/end rectangle on the screen
CB	READ	Read a piece of data
CB	REM	Comments or remarks - FIXME Else uses this too?
DECB	RENAME	Renames a disk file
ECB	RENUM	Allows program line renumbering
CB	RESET	Clear a semigraphics pixel
CB	RESTORE	Start back at the first DATA item
CB	RETURN	Return from a subroutine
SECB	RGB	Set palette to RGB defaults
CB	RIGHT$	Right part of a string
CB	RND	Pseudo-random number generator
DECB	RSET	Right-justifies the data within the field you specify
CB	RUN	Start the program running
DECB	SAVE	Saves filename on disk
ECB	SCREEN	Selects either graphics (1) or text (0) screen and color-set (0 or 1)
CB	SET	Draw a semigraphics pixel
CB	SGN	Get the sign of a number positive or negative
CB	SIN	Sine of an angle
CB	SKIPF	Skip tape file
CB	SOUND	Beep the speaker
ECB	SQR	Returns the square root of a number
CB	STEP	FOR loop control
CB	STOP	Stop the program at the current line
CB	STR$	Convert a number to a string
ECB	STRING	Returns a string of characters of specified length
CB	SUB	Completion token for GOSUB
CB	-	Subtraction operator
CB	TAB	Tabulation
ECB	TAN	Returns tangent of angle given in radians
CB	THEN	Completion token for IF
ECB	TIMER	Returns contents or allows setting of timer
CB	TO	Token for TO in GO TO
ECB	TROFF	Turns off program tracer
ECB	TRON	Turns on program tracer
DECB	UNLOAD	Close any open files on the disk in the drive you specify
CB	USR	User defined function
CB	VAL	Convert a string to a number
ECB	VARPTR	Returns address of pointer to the specified variable
DECB	VERIFY	Turns the verify function on or off
SECB	WIDTH	Set the text screen to a resolution in character width
DECB	WRITE	Writes the data to the buffer you specify