Command	Internal Code	Description
ABS	F170H	Returns absolute value of a number
ACS	F174H	Arc cosine function
AND	F150H	Logical AND operation
AREAD	F18OH	Reads analog input
ARUN	F181H	Auto-run a program
ASC	F160H	Returns ASCII code of a character
ASN	F173H	Arc sine function
ATN	F175H	Arc tangent function
BEEP	F182H	Produces a sound from the device speaker
BREAK	F0B3H	Interrupts program execution
CALL	F18AH	Calls a machine language subroutine
CHAIN	F0B2H	Links to another program
CHR$	F163H	Converts ASCII code to character
CLEAR	F187H	Clears variables and resets memory
CLOAD	F089H	Loads program from tape
CLS	F088H	Clears the display
COM$	F858H	Communicates via serial port
CONSOLE	F0B1H	Switches to console mode
CONT	F183H	Continues from a STOP or BREAK
COLOR	F0B5H	Sets display text color
COS	F17EH	Cosine function
CSAVE	F095H	Saves program to tape
CSIZE	E680H	Sets character size for printing
CURSOR	F084H	Positions cursor
DATA	F18DH	Holds data for READ statements
DEF	F165H	Defines a function
DEGREE	F18CH	Sets angle mode to degrees
DEV$	E857H	Device name for serial communication
DIM	F179H	Declares an array with specified dimensions
DMS	F166H	Degree-minute-second (DMS) conversion
DTE	E884H	Date function
END	F19EH	Marks end of program
ERL	F053H	Returns line number of error
ERN	F052H	Returns error number
ERROR	F1B4H	Error handling function
EXP	F176H	Calculates e^x
FEED	F0B0H	Paper feed on printer
FOR	F1A5H	Begins a FOR loop
GCURSOR	F093H	Graphics cursor control
GLCURSOR	E682H	Lower graphics cursor control
GOSUB	F194H	Jumps to subroutine, returning with RETURN
GOTO	F192H	Unconditional jump to a line number
GPRINT	F09F	Graphics print
GRAD	F186H	Sets angle mode to gradients
GRAPH	E681H	Switches to graphics mode
IF	F196H	Conditional branching
INKEY$	F15CH	Returns last pressed key
INPUT	F091H	Takes input from the user
INSTAT	E859F	Checks input status
INT	F171H	Converts to integer
LCURSOR	E683H	Lower cursor control
LEFT$	F17AH	Returns left substring
LEN	F164H	Returns length of a string
LET	F198H	Assigns a value to a variable
LF	F0B6H	Line feed
LINE	F0B7H	Draws line in graphics mode
LIST	F090H	Displays program code
LLIST	F0B8H	List program to printer
LN	F176H	Natural logarithm
LOCK	F1B5H	Locks program for editing
LOG	F177H	Natural Logarithmic function
LPRINT	F0B9H	Print to line printer
MEM	F158H	Displays memory usage
MERGE	F08FH	Merges another program into current program
MID$	F17BH	Extracts a substring
NEW	F19BH	Clears program and data areas
NEXT	F19AH	Ends a FOR loop
NOT	F16DH	Logical NOT
OFF	F19EH	Turns off power (optional in certain models)
ON	F19CH	Handles events based on specific conditions
OPN	F19DH	Opens file for I/O
OR	F151H	Logical OR
OUTSTAT	E880H	Checks output status
PAUSE	F1A2H	Pauses program execution
PEEK	F16FH	Reads data from a memory address
PEEK#	F16EH	Extended peek for memory data
PI	F15DH	Returns value of Pi
POINT	F168H	Returns graphics point color
POKE	F1A1H	Writes data to a memory address
POKE#	F1A0H	Extended poke for memory data
PRINT	F097H	Displays text on screen
RADIAN	F1AAH	Sets angle mode to radians
RANDOM	F1A8H	Returns a random number
READ	F1A6H	Reads data from DATA statements
REM	F1ABH	Comment statement
RESTORE	F1A7H	Resets DATA pointer
RETURN	F199H	Returns from subroutine
RIGHT$	F172H	Returns right substring
RINKEY$	E85AH	Reads last input key
RLINE	F0BAH	Reads a line from printer
RMT	E7A9H	Remote command for communication
RND	F17CH	Returns a random number (RANDOM?)
ROTATE	E685H	Rotates graphics display
RUN	F1A4H	Starts program execution
SETCOM	E882H	Sets communication mode
SETDEV	E886	Sets device configuration
SGN	F179H	Returns sign of a number
SIN	F17DH	Sine function
SORGN	E684H	Sets origin for graphics
SPAVCE$	F061H	Returns a string of spaces
SQR	F16BH	Returns the square root of a number
STATUS	F167H	Displays status information
STEP	F1ADH	Specifies increment in FOR loop
STOP	F1ACH	Pauses program
STR$	F161H	Converts a number to a string
TAB	F0BBH	Moves cursor to specified position
TAN	F17FH	Tangent function
TERMINAL	E883H	Switches to terminal mode
TEST	F0BCH	Tests condition in program
TEXT	E686H	Switches to text mode
THEN	F1AEH	Specifies action if condition in IF is met
TIME	F15BH	Returns current time
TO	F1B1H	Specifies range in FOR loop
TRANSMIT	E885H	Transfers data via serial
TROFF	F1B0H	Turns trace off
TRON	F1AFH	Turns trace on
UNLOCK	F1B6H	Unlocks program for editing
USING	F086H	Formats output
VAL	F162H	Converts string to a numeric value
WAIT	F1B3H	Pauses execution until condition met
ZONE	F0B4H	Sets tabulation zone for printing

Name	Memory Address	Description
Combination of Characters	D925H	Combines multiple characters into a single string
CHR$	D9B1H	Converts an ASCII code to its corresponding character
STR$	D9CFH	Converts a string representation of a number back to a numeric value
VAL	D9D7H	Converts a string to a numeric value
LEN, ASC	D9DDH	LEN: Returns the length of a string; ASC: Returns ASCII code of a character
RIGHT$	D9F3H	Extracts a specified number of characters from the right end of a string
MID$	D9F3H	Extracts a substring from a string, given a starting position and length
LEFT$	D9F3H	Extracts a specified number of characters from the left end of a string

Name	Memory Address	Description
Subtract	EFB6H	Subtracts one number from another
Add	EFBAH	Adds two numbers
Multiply	F01AH	Multiplies two numbers
Divide	F084H	Divides one number by another
LN	F161H	Computes the natural logarithm of a number
LOG	F165H	Computes the base-10 logarithm of a number
EXP	F1CBH	Calculates the exponential function (e^x)
10^n	F1D4H	Computes 10 raised to the power of a specified exponent
COS	F391H	Computes the cosine of an angle
TAN	F39EH	Computes the tangent of an angle
SIN	F3A2H	Computes the sine of an angle
ACS	F492H	Computes the arc cosine (inverse cosine) of a value
ATN	F496H	Computes the arc tangent (inverse tangent) of a value
ASN	F49AH	Computes the arc sine (inverse sine) of a value
DEG	F531H	Converts a radian measure to degrees
DMS	F564H	Converts a degree measure to degrees, minutes, and seconds
ABS	F597H	Computes the absolute value of a number
SGN	F59DH	Returns the sign of a number (1 for positive, -1 for negative, 0 for zero)
INT	F5BEH	Returns the integer portion of a number, discarding any fractional part
Power Rise	F89CH	Raises a number to a specified power

Name	Memory Address	Description
Numerical Comparison	D0D2H	Compares two numeric values and returns a result
Character String Comparison	D0F9H	Compares two strings lexicographically to determine order

Name	Memory Address	Description
Line number Search	D2EAH	Searches for a specific line number in the program
KEY Scan (1)	E42CH	Scans the keyboard to detect key presses; single key detection
KEY Scan (2)	E243H	Scans the keyboard for combinations
Variable Search	D461H	Searches for a variable by name in the program’s memory

Name	Memory Address	Description
Auto-power-off	E33FH	Manages automatic power-off to conserve battery life
Program display	E8CAH	Displays the current program code on the screen
Graphic Display	EDEFH	Enables graphical display mode
Hexadecimal	ED95H	Displays a value in hexadecimal format
One Character Display	ED3BH	Displays a single character at the current position
Cursor Move After One Character Display	ED4DH	Moves the cursor one position after displaying
Cursor Move After n Character Display	ED00H	Moves the cursor by n positions after displaying

Name	Memory Address	Description
Color Designation	A519H	Sets the color for subsequent text or graphics display
Print	A781H	Sends data to be printed
Linefeed	A9F1H	Moves the cursor or paper to the next line
Paper Feed	AA04H	Advances the paper on a connected printer
Get TEXT Mode Ready	ACBBH	Prepares the system for text mode
Pen Up/Down	AAE3H	Raises or lowers the pen for drawing or plotting
Motor Drive	A8DDH	Activates the motor for peripherals like printers
Motor Off	A769H	Turns off the motor
Get GRAPHIC Mode Ready	ABEFH	Prepares the system for graphics mode

Name	Memory Address	Description
Remote On	BF11H	Activates remote mode for external control or communication
Remote Off	BF43H	Deactivates remote mode
One Character Save	BDCCH	Saves a single character to memory or storage
One Character Load	BDF0H	Loads a single character from memory or storage
Header Input/Output	BCE8H	Manages input/output operations for data headers
CMT I/O Control	BBF5H	Controls cassette tape (CMT) input/output functions
Create Header	BBD6H	Generates a data header for file storage or transmission
Transfer File	BD3CH	Transfers a file between devices or storage media