ASCII Codes

The following predefined characters may be printed or displayed on the screen.

30

(cursor)

63

?  (question mark)

31

(edge character)

64

@ (at sign)

32

(space)

65

A

33

!  (exclamation point)

66

B

34

"  (quote)

67

C

35

#  (number or pound sign)

68

D

36

$  (dollar)

69

E

37

%  (percent)

70

F

38

&  (ampersand)

71

G

39

‘  (apostrophe)

72

H

40

(  (open parenthesis)

73

I

41

)  (close parenthesis)

74

J

42

*  (asterisk)

75

K

43

+  (plus)

76

L

44

,  (comma)

77

M

45

-  (minus)

78

N

46

.  (period)

79

O

47

/  (slash)

80

P

48

0

81

Q

49

1

82

R

50

2

83

S

51

3

84

T

52

4

85

U

53

5

86

V

54

6

87

W

55

7

88

X

56

8

89

Y

57

9

90

Z

58

:  (colon)

91

[  (open bracket)

59

;  (semicolon)

92

\  (reverse slash)

60

<  (less than)

93

]  (close bracket)

61

= (equals)

94

^ (exponentiation)

62

>  (greater than)

95

_  (underline)

 

The following key presses may also be detected by CALL KEY

 

1

SHIFT A (AID)

3

SHIFT F (DEL)

4

SHIFT G (INS)

6

SHIFT R (REDO)

7

SHIFT T (ERASE)

8

SHIFT S (LEFT ARROW)

9

SHIFT D (RIGHT ARROW)

10

SHIFT X (DOWN ARROW)

11

SHIFT E (UP ARROW)

12

SHIFT V (CMD)

13

ENTER

14

SHIFT W (BEGIN)

15

SHIFT Z (BACK)

 

 

 

 




Mathematical Functions

The following mathematical functions may be defined with DEF as shown.

Function

TI Extended BASIC Statement

Secant

DEF SEC(X)=1/COS(X)

Cosecant

DEF CSC(X)=1/SIN(X)

Cotangent

DEF COT(X)=1/TAN(X)

Inverse Sine

DEF ARCSIN(X)=ATN(X/SQR(1-X*X))

Inverse Cosine

DEF ARCCOS(X)=-ATN(X/SQR(1-X*X))+PI/2

Inverse Secant

DEF ARCSEC(X)=ATN(SQR(X*X-1))+(SGN(X)-1)*PI/2

Inverse Cosecant

DEF ARCCSC(X)=ATN(1/SQR(X*X-1))+(SGN(X)-1)*PI/2

Inverse Cotangent

DEF ARCCOT(X)=PI/2-ATN(X) or =PI/2+ATN(-X)

Hyperbolic Sine

DEF SINH(X)=(EXP(X)-EXP(-X))/2

Hyperbolic Cosine

DEF COSH(X)=(EXP(X)+EXP(-X))/2

Hyperbolic Tangent

DEF TANH(X)=-2*EXP(-X)/(EXP(X)+EXP(-X))+1

Hyperbolic Secant

DEF SECH=2/(EXP(X)+EXP(-X))

Hyperbolic Cosecant

DEF CSCH=2/(EXP(X)-EXF(-X))

Hyperbolic Cotangent

DEF COTH(X)=2*EXP(-X)/(EXP(X)-EXP(-X))+1

Inverse Hyperbolic Sine

DEF ARCSINH(X)=LOG(X+SQR(X*X+1))

Inverse Hyperbolic Cosine

DEF ARCCOSH(X)=LOG(X+SQR(X*X-1))

Inverse Hyperbolic Tangent

DEF ARCTANH(X)=LOG((1+X)/(1-X))/2

Inverse Hyperbolic Secant

DEF ARCSECH(X)=LOG((1+SQR(1-X*X))/X)

Inverse Hyperbolic Cosecant

DEF ARCCSCH(X)=LOG((SGN(X)*SQR(X*X+1)+1)/X)

Inverse Hyperbolic Cotangent

DEF ARCCOTH(X)=LOG((X+1)/(X-1))/2

 




Color Codes


Color

Code

Color

Code

Transparent

1

Medium Red

9

Black

2

Light Red

10

Medium Green

3

Dark Yellow

11

Light Green

4

Light Yellow

12

Dark Blue

5

Dark Green

13

Light Blue

6

Magenta

14

Dark Red

7

Gray

15

Cyan

8

White

16



Musical Tone Frequencies

The following table gives the frequencies (rounded to integers) of four octaves of the tempered scale (one half step between notes). While this list does not represent the entire range of tones that the computer can produce, it can be helpful for programming music.

Frequency

Note

Frequency

Note

110

A

440

A (Above Middle C)

117

A#

466

A#

123

B

494

B

131

C

523

C (High C)

139

C#

554

C#

147

D

587

D

156

D#

622

D#

165

E

659

E

175

F

698

F

185

F#

740

F#

196

G

784

G

208

G#

831

G#

220

A

880

A (Above High C)

233

A#

932

A#

247

B

988

B

262

C (Middle C)

1047

C

277

C#

1109

C#

294

D

1175

D

311

D#

1245

D#

330

E

1319

E

349

F

1397

F

370

F#

1480

F#

392

G

1568

G

415

G#

1661

G#

440

A (Above Middle C)

1760

A