HP 1650B - Page 117

CATalog
CATalog
query
The CATalog query returns the directory of the disk in block data format.
The directory consists of a S-character string for each file on the disk.
Each fde entry is formatted as follows:
“NNNNNNNNNN TTITITT
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD”
where N is the filename, T is the file type (a number), and D is the file
description.
Query Syntax: :MMEMory:CATalog?
Returned Format: [:MMEMory:CATalog] c block size > c block data>
where:
-z block size > :: = #8dddddddd (X8 followed by an eight-digit number)
c block data > :: = [<filename =- <file type > <file description >I,,.
Example: 10 DIM File$[Sl]
20 DIM Specifier$[2]
30 OUTPUT XXX;":SYSTEM:HEAD OFF"
40 OUTPUT XXX;":MMEMORY:CATALDG?" !send catalog query
50 ENTER XXX USING "#,2A";Specifier$
!read in #8
60 ENTER XXX USING "#,8D";Length
!read in length
70 FOR I=1 TO Length STEP 51
!read and print each file
80 ENTER XXX USING "#.51A";File$
90
PRINT File$
100 NEXT I
110 ENTER XXX USING "A";Specifier$
!read in final line feed
120 END
HP 1650B/HP 16518
Programming Reference
MMEMory Subsystem
7-5