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

Extended Color BASIC (ECB)

Disk Extended Color BASIC (DECB)

Super Extended Color BASIC (SECB)

COMMANDS

• [ 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
• [ CB] BIRQSV Interrupt service handler
• [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] = 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