IBM 1620 User Manual

Index
ACCEPT Statement .................................. 33
ACCEPT TAPE Statement ... . . . . . . . . . . . . . . . . . . . . . . . . . .. 34
Adding Subroutines .................................. 61
Additional Core Storage, Modification for
.............. " 71
Alphameric Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 40
Analysis of the FORTRAN Program, Part 4 . . . . . . . . . . . . . . . .. 58
Arithmetic Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 18
Arithmetic
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 18
Arra
ys ....... , .. , ...... , . . . . . . . . . . . . . . . . . . . . . . . . . .. 17
Blank Field Specification
............................ " 41
Block Diagramming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. 44
Card Form, FORTRAN ..... , . • . • • . • . . . . . . . . . . . . . . . • . . .. 12
Card, IBM ...••......... , .....•.....•.............•. 10
Card Input, 1620 Opera1:ing Principles ................. " ~9
Coding Fornl ...................... , ............... .
Compiler, Loading
... , ........... , .................. .
Compiler
Program, Format of ....................... 66,
Compiling
the Source Program ........................ .
Computed GO TO .......•.... , ..•....................
Console ................ , .......................... .
Constants
CONTINUE Statement ................................ .
Control Statements ................................. .
Unconditional GO TO .............................. .
Computed GO TO ...............................•..
IF ...................•......•....••........•....
IF (SENSE SWITCH) ....• ....•..••..••..•..•...••...
PAUSE
......................................... ' ..
STOP
DO
CONTINUE ...•. " ...•....•. " ....... " . " .... '" .•
END ...........•......................•..........
Correcting FORTRAN Tapes ........................... .
Diagramming
Symbols .............................. .
DIMENSION Statement ., ............................. .
DO Statement
11
52
68
52
24
91
14
30
22
23
24
25
25
26
26
26
30
31
69
44
43
26
DO Statement, Restrictions on . . . . . . . . . . . . . . . . . . . . . . . . .. 30
Duplicating Tapes ................................. " 69
END Statement .................................... " 31
Error Analysis, Pre-Compiler Program ................. " 75
Error Analysis, Source Program ...................... " 54
Error Analysis, SUBROUTINES .•..•..••••..........•.... 59
Error Codes, Pre-Compiler Program ., ................ " 72
Execution of
the Object Program ....................... 55
Expressions ........................................ 18
Fixed
Point Arithmetic ............................. " 13
Fixed Point Constants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 14
Fixed
Point Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15
Floating Point Accumulator (FAC) ......•.••.•.•..•..... 59
Floating Point Arithmetic . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 12
Floating Point Constants ............................ " 14
Floating Point Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 15
FORMAT Statement .................................. 35
FORTRAN Arithmetic ................................. 21
FORTRAN Pre-Compiler Program, Part 5 ............... " 72
Functions
.......................................... 21
GO TO, Computed ... , .............................. , 24
GO TO, Unconditional ... . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 23
106
IF Statement ....................................... 25
IF (SENSE SWITCH) Statement ........................ 25
Index Values, DO Statement . . . . . . . . . . . . . . . . . . . . . . . . . .. 30
Input Data, Typewriter ............................. " 56
Input/Output Statements ., .......................... .
READ ...........•...•...••.••••.•.•••.•.••.•••••.
ACCEPT .•..•.•..•..•..•...•.•...•••••.....•......
ACCEPT TAPE ....•............••..••.••..•..•...•.
PUNCH ..................•..•....•.•..••••••.•...
TYPE
PUNCH TAPE .••.........•..•.••.••.••.•..•..•..•.•
PRINT •.•.••....••........•.•.•.••••...•...•.....
Input Specifications, Example ........ ~ ............... .
Interpreting Errors, Pre-Compiler Program .............. .
33
33
33
34
34
34
34
34
35
76
Loading Subroutines
............................... " 53
Loading the Compiler .............................. " 52
Mode, Fixed Point - Floating Point ................... " 20
Modifying FORTRAN for Additional Core Storage ........ " 71
Naming Variables ................................. " 15
Object Program, Definition ........................... 7
Object Program, Execution of . . . . . . . . . . . . . . . . . . . . . . . .. 55
Object Program, Format of ......................... 67, 69
Object Program, Producing the. . . . . . . . . . . . . . . . . . . . . . . .. 51
Operating Keys and Lights, Card Read Punch . . . . . . . . . . .. 89
Operating Keys and Lights, Console .................. " 91
Operating Keys and Lights, Printer . . . . . . . . . . . . . . . . . . .. 96
Operating Switches and Lights, Paper Tape Reader. . . . . . .. 88
Operating
Principles, Part 3 ........................... 51
Operating Principles, 1620 ............................ 83
Operation Symbols .................................. 18
Output Specifications, Example ...................... " 38
Paper Tape, Description of . . . . . . . . . . . . . . . . . . . . . . . . . . .. 10
Paper Tape Input, 1620 Operating Principles ........... " 84
Paper Tape Punch ................................. " 85
Paper Tape Reader .................................. 86
Parentheses, Correct Use of ......................... " 20
PAUSE Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 26
Pre-Compiler Program, Description of . . . . . . . . . . . . . . . . . .. 72
Pre-Compiler Program, Format of . . . . . . . . . . . . . . . . . . . . .. 78
Pre-Compiler Program, Processing with ................. 77
Preservation of Index Values . . . . . . . . . . . . . . . . . . . . . . . . .. 30
Printer
Output, 1620 Operating Principles ............... 95
PRINT Statement .................................... 34
Printing Multiple Lines .............................. , 42
Processor, Definition of .............................. , 7
Program, Example of ................................. 44
Program Summary, Pre-Compiler Program .............. , 75
Program Testing .................................... 49
Program Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 49
PUNCH Statement.................................... 34
PUNCH TAPE Statement ............................... 34
READ Statement .................................... , 33
Restart Procedures, Pre-Compiler Program . . . . . . . . . . . . . .. 75
Rules for
Forming Expressions. . . . . . . . . . . . . . . . . . . . . . . .. 19
Sample Program .................................... 44
Source Program .................................... , 7
Source Program Errors .............................. , 54

IBM 1620 Specifications

General

Brand	IBM
Model	1620
Category	Desktop
Language	English