Radio Shack TRS-80 PC-4 User Manual

Chapter 5 Program Ca I cu lation ...............................27
5-1 Program Outline ............••................. ......•... 27
5-2 Program Fundamentals
...............................•.•... 28
5-2-1 Constants and Variables ...•••....•.•.••.......•..........••••. 28
5-2-2
Substitution Statements •.•..•..........•...................... 29
5·3 Program Writing and Execution ...........................••.. 30
5-3-1 Program Writing ...•.••...••.••••.•...............•...• 30
5-3-2 Program
Execution •...•••...••••....................... 32
5·4 Program Editing .................•.....•.•..••.....•..... 34
5-5
Program Debug "" .. .. .. 40
5-6 Program Commands
.............•••.••..•..•.............. 44
5-6-1
5-6-2
5-6-3
5-6-4
&-6-5
5-6-6
5-6-7
5-6-8
5-6-9
5-6-10
5-6-11
5-6-12
5-6-13
5-6-14
5-6-15
5-6·16
5-6-17
Input Command (INPUT, KEY) 44
Output Command (PRINT, CSR) 45
Jump Command (GOTO) .•.•...•••...•.................• 47
Judgement Command
(IF - THEN) ..•....•...•...•••.•.•.... 48
Loop Command (FOR·NEXT) ....•••.•..•..•.............. 49
SUbroutine Command (GOSUB,
RETURN) ................•....• 51
Multistatement .....•.•.•.•.•••..••...•.•.•.....•••.• 54
Stop Command (STOP) •.•••••...•.•.•.............•.... 54
End Command (END) ...•...•.•...............•.•.•••.. 54
Execute Command (R UN) .•...•.............•.•.•....•.•• 54
List Command (LIST) .........................••••.•... 55
Mode Designation (MODE)
•••.•.................••.•••.•. 55
Output Format (SET) .......•...............•••.•...... 56
Character Functions (LEN, MID, VAL) ...............••••..... 56
Memory Clear (V AC) ..................•.....•....•...•. 57
Program Clear
(CLEAR, CLEAR A) .............•.••.•...•.•. 57
Option Specifications .................................•• 58
Cassette Magnetic Tape
(SAVE, LOAD, SAVE A, LOAD A, PUT, GET, VER). 58
Printer ...................................•••.•• 60
Error Message List It 61
Program Command List I ................................................... • '62
Function Digit Capacity 64
Specifications 65
-2-

Radio Shack TRS-80 PC-4 Specifications

General

Brand	Radio Shack
Model	TRS-80 PC-4
Category	Desktop
Language	English