User`s guide

DUMP
The second listing includes the two options /WORDS (specifying octal words) and
/BYTES (specifying octal bytes). If you do not include the /WORDS option along
with the /BYTES option, the listing will not contain words in octal code.
Note also the relationship of the bytes to the words. For example, the first octal word
is 044124. That word is divided into a left byte represented by the octal number 124
and a right byte represented by the octal number 110. However, the bytes are
displayed in address order; the low-order byte of each word is displayed before the
high-order byte. See the following diagram:
01
01
01
00|1
4
001
010
00|0
4
01|
1
010
010
001
|100
100
000
Word in binary
represented in octal
two−byte components
Two bytes in address order
represented in octal
2 4
000
100
| 01
01
1 2 4 1 01
|
The RT–11 Quick Reference Manual has a reference section table listing the left/right
byte equivalents for each of the octal numbers from 000 to 377.
The ASCII equivalent of each byte is placed below that byte.
Note the dots in the listing. DUMP uses a dot to represent not only a period but
also nonprinting codes, such as those for control characters.
Second Listing
DK:FOX.TXT
BLOCK NUMBER 000000
000/ 044124 020105 052521 041511 020113 051102 053517 020116
124 110 105 040 121 125 111 103 113 040 102 122 117 127 116 040
T H E Q U I C K B R O W N
020/ 047506 020130 052512 050115 042105 047440 042526 020122
106 117 130 040 112 125 115 120 105 104 040 117 126 105 122 040
F O X J U M P E D O V E R
040/ 044124 020105 040514 054532 042040 043517 000056 000000
124 110 105 040 114 101 132 131 040 104 117 107 056 000 000 000
T H E L A Z Y D O G . . . .
060/ 000000 000000 000000 000000 000000 000000 000000 000000
000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000
. . . . . . . . . . . . . . . .
HOW TO INTERPRET A DUMP OF A DIRECTORY
One reason for examining volumes is to check the information stored in directories.
To understand how to interpret a dump listing of a directory, note the following
directory of an RX50 diskette:
100 RT–11 Command Descriptions