TI-86 Link Protocol Guide v1.0 - Tokens and Character Codes

TI-86 Tokens

In order to save space and execution time, the TI-86 tokenizes all BASIC programs and equations before running or evaluating them. Rather than trying to interpret multiple-character command names in real-time, all simple commands are compressed down to one or two bytes. All possible tokens that can exist in a program are shown below. Blue-colored squares link to a note describing the token's function. Red-colored squares link to a separate table of two-byte tokens starting with the original byte (3Dh or 8Eh). Black-colored squares have no known function.

TI-86 Tokens	Least Significant Digit
Most Significant Digit		0	1	2	3	4	5	6	7	8	9	A	B	C	D	E	F
	0		Rec	Pol	Cyl	Sph	DMS	Bin	Hex	Oct	Dec	Frac		[	]	{	}
	1	(	)	round	max	min	mod	cross	dot	aug	rSwap	rAdd	multR	mRAdd	sub	lcm	gcd
	2	simult	inter	pEval	randM	seq	evalF	fnInt	arc	fMin	fMax	der1	der2	nDer	note 1		,
	3	or	xor	note 2	note 3	note 3	note 3	note 3	note 3	note 3	note 3	note 3	note 2	note 2	more	note 4	=
	4	and	rand		getKy	note 5	%	!	r	°	-1	2	T	Menu	P2Reg	P3Reg	P4Reg
	5	==	<	>				Radian	Degree	Normal	Sci	Eng	Float	Fix	RectV	CylV	SphereV
	6	+	-	Func	Param	Pol	DifEq	Bin	Oct	Hex	Dec	RectC	PolarC	dxDer1	dxNDer	:	note 6
	7	*	/	SeqG	SimulG	PolarGC	RectGC	CoordOn	CoordOff	DrawLine	DrawDot	AxesOn	AxesOff	GridOn	GridOff	LabelOn	LabelOff
	8	nPr	nCr	Trace	ClDrw	ZStd	ZTrig	ZFit	ZIn	ZOut	ZSqr	ZInt	ZPrev	ZDecm	ZRcl	more	DrawF
	9	FnOn	FnOff	StPic	RcPic	StGDB	RcGDB	Line	Vert	PtOn	PtOff	PtChg	Shade	Circl	Axes	TanLn	DrInv
	A		-	abs	iPart	fPart	int	ln	e^	log	10^	sin	sin-1	cos	cos-1	tan	tan-1
	B	sinh	sinh-1	cosh	cosh-1	tanh	tanh-1	sign	det	ident	unitV	norm	rnorm	cnorm	ref	rref	dim
	C	dimL	sum	prod	sortA	sortD	livc	vcli	lngth	conj	real	imag	angle	not	rotR	rotL	shftR
	D	shftL	eigVl	eigVc	cond	poly	fcstx	fcsty	eval	If	Then	Else	While	Repeat	For	End	Return
	E	note 7	note 8	Pause	Stop	IS>	DS<	Input	Prompt	InpSt	Disp	DispG	Outpt	ClLCD	EqSt	StEq	Fill
	F	^		Solver	OneVar	LinR	ExpR	LnR	PwrR	ShwSt	Hist	xyLine	Scatter	SortX	SortY	LU

3D XX Tokens	Least Significant Digit (second byte)
Most Significant Digit		0	1	2	3	4	5	6	7	8	9	A	B	C	D	E	F
	0	zxScl	zyScl	xScl	yScl	xMin	xMax	yMin	yMax	tMin	tMax	tStep	Step	ztStep	zStep	tPlot	Min
	1	Max	zxMin	zxMax	zyMin	zyMax	ztPlot	zMin	zMax	ztMin	ztMax	lower	upper	x	y	xFact	yFact
	2	difTol	tol		Na	k	Cc	ec	Rc	Gc	g	Me	Mp	Mn	µ0	0	h
	3	c	u	e	xStat	yStat	fStat	TblStart	Tbl	fldRes	EStep	dTime	xRes	zxRes	FldPic

8E XX Tokens	Least Significant Digit (second byte)
Most Significant Digit		0	1	2	3	4	5	6	7	8	9	A	B	C	D	E	F
	0	PxOn	PxOff	PxChg	Get	Send	SinR	LgstR	TwoVar	GrStl	DrEqu	LCust	Form	Select	PlOn	PlOff	ClrEnt
	1	StReg	IAsk	IAuto	Text	Horiz	DispT	ClTbl	DelVar	Box	MBox	ClrLsts	FldOff	DirFld	SlpFld	SetLEdit	Plot1
	2	Plot2	Plot3	RK	Euler	ZData	Asm	AsmComp	note 9	note 10	note 11	PxTest	randInt	randBin	randNorm	median	cSum
	3	cSum	Deltalst

Notes:

• Note 1: Token 2Dh is an opening quote. A zero-terminated literal character string immediately follows token 2D, and the terminating zero acts as the closing quote. Example: "Hi" would be tokenized {2Dh, 48h, 69h, 00h}
• Note 2: Tokens 32h, 3Bh, and 3Ch are variable-name tokens. The first byte after the token is a name-length byte. Following that is a literal character string (not zero-terminated) representing the name of the variable.

  Token 32h is used for the y-variables Q1 ... Q9, QI1 ... QI9, r, t, x, y and .

  Token 3Bh is used for the y-equations y1 ... y99, xt1 ... xt99, yt1 ... yt99, r1 ... r99 and Q'1 ... Q'9.

  Token 3Ch is used for the statistical variables a, b, corr, maxX, maxY, Med, minX, minY, n, PRegC, Qrtl1, Qrtl3, RegEq, Sx, Sy, x, y, x, x², xy, y, y², tolMet, and .

• Note 3: Tokens 33h - 3Ah are 1- to 8-character variable name tokens, respectively. A literal character string follows (not zero-terminated).
• Note 4: Token 3Eh is the conversion token. Following the token is the name-length byte for the original unit, then a literal character string representing the unit's name. Following that is the name-length byte for the new unit, then a literal character string representing the new unit's name. Neither name is zero-terminated.
• Note 5: Token 44 is a literal-number token. Following the token is a zero-terminated literal character string that represents the number. Valid characters are the digits 0-9; the hexadecimal digits A-F; base descriptors b, h, o, and d; the period; the negation character and the exponent (E) character.
• Note 6: Token 6F is the carriage-return token.
• Note 7: Token E0 is the Lbl token. Following the token is a zero-terminated literal character string representing the label name.
• Note 8: Token E1 is the Goto token. Following the token is a zero-terminated literal character string representing the label name.
• Note 9: Token 8Eh 27h is the AsmPrgm token. Everything that follows the token is a literal ASCII character. Valid characters are the digits 0..9, the letters A..F and the hard return character (D6h).
• Note 10: Token 8Eh 28h is the Compiled Assembly token. It is the first and only token in a compiled assembly-language program. Everything that follows is binary Z80 machine code.
• Note 11: Token 8Eh 29h is the Edit-Lock token. It is the first token in a program that cannot be edited.

TI-86 Character Codes

The TI-86 follows the ASCII standard for normal printable characters - those in the range 32 (20h) to 126 (7Eh). All other possible characters take the place of control characters (0 to 31) and extended ASCII characters (127 to 255).

All characters and their character codes in the TI-86 6x8-pixel home screen font are shown here:

All characters and their character codes in the TI-86 6x6-pixel menu font are shown here:

File Formats

Table of Contents