Radio Shack CTR-118 User Manual Page 11
- Page / 196
- Table of contents
- BOOKMARKS
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iii
5.
When you are not going to use a CTR-80 for loading or recording
programs, do not leave RECORD or PLAY keys down (press STOP).
6.
REWIND and FAST-FORWARD are not under remote control; simply
press the appropriate key until the tape has moved to the desired
position.
7.
If you want to save a taped program permanently, break off the erase
protect tab on the cassette (see CTR-80 Manual).
8.
Do not expose recorded tapes to magnetic fields. Avoid placing your tapes
near the Power Supply.
9.
To check if a tape has a program recorded on it, you can disconnect the
plug from the EAR jack (also disconnect the REM plug so you can control
the CTR-80 with the keys) and Play the tape; you'll hear the program
material from the speaker.
10.
For the best results when using a Recorder with the Computer, you
should keep the Recorder's heads and tape handling mechanism very
clean. A new Recorder should be cleaned before it is used the first time,
and cleaned again after every four hours' use. In addition, the tape heads
should be demagnetized periodically.
A complete line of recorder accessories (cleaning solution, cotton tipped
swabs, demagnetizer-cassettes, etc.) is available at your local Radio
Shack store.
Special Notes:
1)
Before attempting to load a program from tape into the Computer, be
sure the cassette is rewound to a
blank
portion of the tape preceding the
program. If you try to start the load in the middle of a preceding program,
you probably will get the Computer "hung up" (in which case you'll have
to press Reset and start over). The same rule applies when you're using
the CLOAD? command to compare a taped program with one stored in
the Computer.
2)
For best results when re-using tapes, erase the old program with a bulk
tape eraser (such as Radio Shack Catalog Number 44-210).
WARNING
In dry climates, and especially in winter, static electricity can play havoc
with computer data tapes. Handling a cassette when you are "charged"
with static electricity can put clicks on the tape and make its data
unreadable by the Computer.
Under such conditions, be sure to ground yourself (by touching a metal
surface, etc.) before handling cassettes. You may also remove some of the
causes of static electricity buildup, by using anti-static sprays on rugs,
humidifying the air, etc.
- LIMITED WARRANTY 2
- One Tandy Center 3
- Fort Worth, Texas 76102 3
- CONTENTS 5
- This Reference Manual and You 7
- Setting up the System 9
- Notes on Using the Recorder 10
- Special Notes: 11
- 1 / General Information 13
- Operating Modes 14
- Special Function Keys 15
- Variable Names 16
- Variable Types 16
- Arithmetic Operators 17
- Relational Operators 18
- String Operators 19
- Order of Operations 19
- Intrinsic Functions 20
- Graphics 20
- Error Messages 20
- Abbreviations 20
- Keyboard Rollover 21
- Glossary for LEVEL II BASIC 22
- 2 / Commands 23
- CLOAD? " 25
- CSAVE"1" 26
- CSAVE"A" 26
- DELETE 5 26
- DELETE 11-18 26
- 3 / Input-Output 31
- @ position, item list 33
- PRINT TAB 33
- (expression) 33
- PRINT USING 34
- PRINT #-1 42
- INPUT #-1 42
- Sample Program 43
- 10 INPUT#-1,A1,B$,L$ 43
- 20 PRINT A1,B$,L$ 43
- 40 GOTO 10 43
- 4 / Program Statements 45
- 10 DEFINT A,I,N 46
- 10 DEFINT I-N 46
- 100 DEFSNG I,W-Z 47
- 10 DEFDBL S-Z, A-E 47
- 10 DEFSTR L-Z 48
- 10 CLEAR 1000 48
- ON ERROR GOTO 57
- Data Conversion 62
- Typing of Constants 62
- Type Conversion 63
- 5 / Strings 67
- String Input/Output 68
- String Comparisons 69
- String Operations 70
- String Space 70
- (string) 71
- (string, n) 74
- STRING$ 76
- Coding/Decoding Program 78
- Instring Subroutine 78
- 6 / Arrays 81
- Other Types of Arrays 84
- 7 / Arithmetic Functions 89
- 100 K%=CINT(X#)+CINT(Y#) 90
- 100 Y=COS(X+3.3) 90
- 100 PRINT CSNG(A#+B#) 90
- 100 PRINT EXP(-X) 91
- 100 Y=ABS(A-FIX(A)) 91
- 100 Z=INT(A*100+.5)/100 91
- 100 PRINT LOG(3.3*X) 91
- 8 / Special Features 95
- ERR /2+1 98
- (address) 100
- CALL 0A7FH 103
- JP 0A9AH 103
- (variable name) 107
- Logical Operators 109
- 20 GOTO 10 111
- 9 / Editing 113
- ENTER key 114
- Space-bar 114
- 100 FOR I=1 TO 10_ 115
- 100 FOR I=_ 115
- L (List Line) 116
- X (Extend Line) 116
- I (Insert) 117
- A (Cancel and Restart) 117
- E (Save Changes and Exit) 117
- Q (Cancel and Exit) 118
- H (Hack and Insert) 118
- D (Delete) 118
- 100 FOR I=1 TO 1_ 119
- 10 / Expansion Interface 121
- Line Printer 122
- LPRINT CHR$(10) 124
- LINE ONE 124
- LINE TWO 124
- LINE THREE 124
- POKE 16424,40 125
- POKE 16425,0 125
- Mini-Disks - (DISK BASIC) 126
- Additions to LEVEL II 126
- Expansion of RAM Memory 127
- 11 / Saving Time and Space 129
- Speeding Up Execution 130
- Appendix 131
- A / Level II Summary 133
- Commands 135
- Input/Output Statements 138
- Program Statements 140
- String Functions 144
- Arithmetic Functions* 145
- Special Functions 146
- LEVEL II Reserved Words* 148
- B / Error Codes 151
- Explanation of Error Messages 152
- Hard-To-Find Errors 153
- C / TRS-80 Character Codes 155
- Decimal/Hexadecimal Codes 156
- Control Codes: 0-31 157
- Graphics Codes: 128-191 158
- Graphic Characters 161
- D / Memory Map 163
- Important Addresses 164
- F / Derived Functions 167
- G / Base Conversions 169
- H / User Programs 173
- Sort Routine 175
- Space-Ship Lander 176
- Customer Information 178
- Target Practice 180
- Using Your Cassette Deck 185
- LEVEL II 187
- Hints and Tips 187
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