Prepared by: Steve J. Martin on 1997-01-01
The filename parameter is required. The element/version is optional. Operation is strictly read-only. The input file/element is never modified. The following global options are available:
B - BRIEF mode. Same as the editor. Records are not automatically displayed when addressed via NEXT, +/-,
etc. C - LOCATEs and FINDs are case-sensitive. (Normally they are not.) E - This will disable escape sequences in output. These are normally used to emphasize embedded control characters and accentuate the ten's digit in SCALE output. (Control characters will continue to be translated, but won't be shown in low intensity or reverse video). This option is assumed if using batch or breakpointed. F - This provides additional full-screen capability when using FUSION. Screen I/O is somewhat more efficient, but the bottom line of the screen is not preserved. Experiment to see which works best for your terminal/configuration. This option must be given to use FUSION under a pre-41 level EXEC. G - Global search flag. Normally, when a REFORMAT is active, LOCATEs and FINDs will work against the reformatted record. If this option is set, the unformatted record will be searched instead. L - Display the current record size (in bytes) at each user prompt. N - This will disable the FUSION package. FUSION is automatically disabled when using ZIP from batch or when breakpointed. Both 'N' and 'E' should be set if outputting to an attached printer or in other applications where escape sequences are undesired. O - This determines the action of the carriage return when given at the command prompt. In the released version of ZIP, a will display continuously until the screen is filled, starting at the next record in the file. If the 'O' option is set, only a single record will be displayed. If you are using a version of ZIP with the <CRPAGE> parameter set to zero, single-line operation is the default and the 'O' option will enable continuous display. P - Print embedded print control images when found in print files. Q - Compresses extra blanks from all output, except PRINT. This also bypasses nonsignificant blanks in LOCATE/FIND operations. S - Normally, after a full screen of output without command input, operation is suspended and the CONTINUE:> prompt is displayed. A carriage return will produce the next screen of output, and so on. At any time the current command can be cancelled by entering STOP (or S) at the prompt. A new command can also be given, which will cancel the previous command. If the 'S' option is set, this enables scrolling output and the CONTINUE prompt is not produced. V - This has meaning only when given on the ZIP call line. It will disable the automatic load of saved symbols when ZIP is called to read a file for which symbols had been previously saved. X - Take ER ERR$ termination if a serious error is encountered. For compatibility with previous releases, this option is never assumed. Y - Normally, when used from batch or when breakpointed, ZIP will echo all command input. The 'Y' option disables this feature.
All options are dynamic. Each can be set and cleared with the ON and OFF commands. Use the OPT command to display current option status.
number Moves to the numbered line +number Advances number lines -number Backs up number lines GO num[+/-offset] Moves to the numbered line N Advances to the next line P num Prints num lines (including current line) P+ num Prints num lines (starting at next line) O num Same as P+ P num1 num2 Prints lines from num1 through num2 num1,num2 can be in relative (i.e. N+/-) format P! Prints the entire file LNP Same as all P commands but includes line number Q Same as all P commands, extra blanks are omitted LNQ Same as Q, includes line number T Positions to the top of the file LAS Positions to the last line of the file L string Locates the next occurrence of
Surround string with single quotes to include trailing spaces. If string is omitted, the previous string is used. L? Displays the current locate string and column limits LC string Locates all remaining occurrences of string LC*num string Locates the next num occurrences of string LC,num string Searches the next num lines for all occurrences of string LC[num1,num2] .. Limits searches to columns num1 thru num2 Also allowed with L, LC* and LC, LIM L num1 num2 Permanent specification of column limits for L and LC TCC char Specification of transparent locate character F string Same as LOCATE except only strings which begin in column 1 are located. F? FC FC* FC, Same as LOCATE/LC except match only begin at col. 1. TCH char Specification of transparent find character BRI Turns on BRIEF mode (global 'B' option) VER Turns off BRIEF mode CASE N|U Turns case-sensitivity on and off (global 'C' option) LOOP count Queues up a set of commands for repeated processing (Loop nesting, LPSUB, LPTST, etc. are unsupported) WAIT numS Waits num seconds before proceeding TIM Displays date/time, name of current file/element REM Comment line. Commands beginning with an asterisk or a period are also treated as comments. EXIT OMIT END Any of these commands will terminate ZIP.
ZIP can be interrupted at any time with @@X C. As with the text editor, execution is interrupted and the user is positioned at the line that was being processed when the interrupt occurred.
CarriageReturn A carriage return given at the command prompt will display continuously, starting at the next record, until the screen is full. If the global 'O' option is set, only the next record will be displayed. The meaning of the global 'O' option is inverted if ZIP is generated with
set to zero. ON option(s) Sets one or more global options, as described on pages 2 and 3. If more than one option is given, do not separate with spaces or commas. OFF option(s) Clears one or more global options, same syntax as ON. OPT Displays options which are currently ON. SCA[,F] num1:num2 Displays the current record from byte num1 through num2. Multiple lines are used if necessary. Under each character is its corresponding column number. The tens digit is displayed in normal intensity and overlays the units digit for all columns ending in zero. Units digits for all other columns are shown in low intensity. If num1 and num2 are not given, the entire record is scaled. This command is not allowed when positioned at a zero-length record. If the 'F' option is given and a REFORMAT is active, the formatted record is scaled. OCT[,F] num1:num2 Displays the current record in octal, from byte num1 through num2. If both parameters are omit- ted, the entire record is displayed. This command is not allowed when positioned at a zero-length record. If the 'F' option is given and a REFORMAT is active, the formatted record is used. WID width Selects the current terminal width. The width parameter must be either 80 or 132. 80 is assumed for demand, 132 when batch or breakpointed. FB These commands work exactly the same as FC and LC, LB except that line numbers are not appended to text that is printed when matching strings are found. FR These commands work exactly the same as FIND and LR LOCATE, except that ZIP will return to the starting record if no matching string is found. HELP topic This activates the online HELP facility. Topic is either a ZIP command or a general information category, such as FIELD or SYMBOL. If topic is not given, a list of topics is displayed. Some topics have sub- topics for more detailed information. When using the HELP facility, the prompt is: HELP [topic]. To get a list of topics, enter a question mark. To return to basic HELP mode and/or to ZIP command input mode, enter a carriage return. IF identifier These commands are used to selectively execute one or ELSE more following commands depending on the success or IFEND failure of the last FIND or LOCATE command. The identifier must be one of the following: F$ (Last F,FC,FB or FR was successful) NF$ (Last F,FC,FB or FR was not successful) L$ (Last L,LC,LB or LR was successful) NL$ (Last L,LC,LB or LR was not successful) The IF command is used to start a sequence. The ELSE command may optionally follow IF to handle the opposite condition. The IFEND command terminates a sequence. It is possible to nest IF sequences to any depth that is desired (ELSE will always be applied to the innermost IF in the nest). LOOPs may contain IF...ELSE...IFEND sequences, or may be contained within them, but loops cannot be nested within loops. SLV letter Sets the value of the specified line variable (a single letter, A-Z) to the current line number. Line variables may be used in place of numbers with the following com- mands: P, LNP, O, Q, LNQ, EXT, WRITE, SITE, LNS, COUNT. The letter 'N' is reserved and always refers to the cur- rent line number. This feature was added so a batch run could use the LOCATE command to find the starting and ending line numbers for an extracted subset of the input file. For example: L start_target SLV A L end_target EXT file A N REA filename.element/version The REATTACH command allows ZIP to read another file or element into its internal buffer, thereby overwriting the previous one. REA works like the OLD command of CTS or IPF. SELECT and REFORMAT commands remain in effect. Thus, when combined with other commands, REATTACH can be used to merge all or parts of files. Example: @ZIP ECL.ELT1 SEL 1:1<>'@' OPEN,U TPF$.CARDS WRITE! REA ECL.ELT2 WRITE! CLOSE EXIT
REF field1 field2 ... fieldn Initial REFORMAT REF+ fieldn+1 ... fieldn+x Append additional fields REF? Display current field parameters UNF Deactivate reformatting REF Re-activate w/prior parametersEach field takes the following form:
start:stop,format where: start is the first column number to process stop is the last column number to process format is one of the following: A - Alpha - character string substitution AN - Alpha nofill - Same as 'A', no fill characters if the field extends beyond the end of the record AP - Alpha packed - same as 'A', fills and spaces omitted UC - Unsigned COMP field (max 6 characters) SC - Signed COMP field (max 6 characters) UP - Unsigned packed - same as 'UC', leading zeroes omitted SP - Signed packed - same as 'SC', leading zeroes omitted start and stop are required. format is optional and defaults to 'A' if none is specified.For example, suppose a data record was defined as follows:
01 MASTER-RECORD. 02 EMP-SSN PIC X(9). (cols 1-9 02 EMP-NAME PIC X(30). 10-39 02 EMP-ADDRESS PIC X(60). 40-99 02 EMP-VAC-HRS PIC 9(5) COMP. 100-101 02 EMP-SICK-HRS PIC 9(5) COMP. 102-103 02 EMP-BASE-PAY PIC 9(10) COMP. 104-107)
If you wanted to see name, SSN, vacation, sick and base pay you could reformat this record as follows:
REF 10:39 1:9 100:101,UC 102:103,UC 104:107,UC
Reformatted records can also contain literal text. This is useful for preparing simple reports and for clear separation and identification of data fields. Literal text is specified within quoted strings which can be interspersed between fields on the REFORMAT command. For example:
REF 'Name = ' 10:39 ' SSN = ' 1:9 ' Vacation hrs = ' 100:101,UC REF+ ' Sick hrs = ' 102:103,UC ' Base pay = ' 104:107,UCWhen a field extends beyond current record limits, its position in the reformatted record is wholly or partially replaced with fill char- acters. The default fill character is the period. The FILL command is used to override the default.
FILL new character or spaceFields of the 'AN' format (alpha nofill) are not replaced with fill characters if they extend beyond the record limit. In this respect, they can be of variable length. An 'AN' field that is totally outside the original record will add no characters to the reformatted record.
Fields of the 'AP' format (alpha packed) are similar to 'AN' except that spaces are removed as well. 'AP' fields can always be of variable length. A typical use of this format would be formation of ECL output with a columnar list of qualifiers and filenames as input. For example:
REF '@PRT,F ' 1:12,AP '*' 13:24,AP '(' 25:27,AP ').'Fields which are not separated by a quoted string are separated by one character. The default ASCII separator is a vertical bar and the default Fieldata separator is a colon. The SEP command is used to override the default.
SEP,T This will make the separator an ASCII tab (011). The records must be ASCII. Useful for upload to MAPPER. SEP,N This will suppress all separation between fields, except literal text if present in the REFORMAT command.
: <,format> can be 1-12 alphanumeric characters, including '$' and '-'. The first character may not be a number. The same symbol can be redefined as often as desired. : <,format> is identical to the field definition specification as used with REFORMAT.
DEF EMP-SSN 1:9 (refer to section 5, reformatting) DEF EMP-NAME 10:39 DEF EMP-ADDRESS 40:100 DEF EMP-VAC-HRS 100:101,UC DEF EMP-SICK-HRS 102:103,UC DEF EMP-BASE-PAY 104:107,UCNote that the names do not necessarily have to be the same as the COBOL data definitions, it just makes it easier if they are similar.
The REFORMAT in the examples on pages 7,8 could then be given as follows:
REF EMP-NAME EMP-SSN EMP-VAC-HRS EMP-SICK-HRS EMP-BASE-PAY or: REF 'Name = ' EMP-NAME ' SSN = ' EMP-SSNSymbols can also be used with a subscript. For example:
02 ACCT-NUM PIC X(10) (cols 1-10 04 SUB-ACCT OCCURS 5 TIMES PIC 9(5) COMP. 10-20)To reformat the master account and sub-accounts 2 and 5, you could:
DEFINE ACCT-NUM 1:10 DEFINE SUB-ACCT 11:12,UC REFORMAT ACCT-NUM SUB-ACCT(2) SUB-ACCT(5)Symbols can be displayed using the DISPLAY command.
DISPLAY symbolThis shows the value of start,stop, and format for the symbol desired. If symbol is omitted, all defined symbols are listed.
Once a set of symbols has been defined, it can be saved for future
use with the SAVE command. SAVE has no options or parameters. Saved
symbols are written to an omnibus element in the ZIP library file:
When the same file is read again with ZIP, the ZIPLIB$ file is
searched for a matching set of saved symbols. If found, the symbols are
restored during processor initilization. If the same set of saved symbols
is desired while reading a different file (or element), the symbols can
be restored to the current ZIP session with the command:
If a symbol is no longer needed, it can be removed with the UNDEFINE
command. If the set of symbols is saved again, the deletion will become
The following options can be given with the SELECT command:
An alternate method of data extraction is available if it is desired
to write multiple groups of records to the same output file or element.
This is done with the OPEN, WRITE, and CLOSE commands.
Only one file can be open at a time. While an output file is open,
the EXT, SITE and LNS commands are not allowed. All other commands remain
Once keys have been defined, the SDEF command may optionally be
used to set sort parameters. The parameters are approximated if not
specified, but it is sometimes necessary and usually more efficient to
use this command, as follows:
The NUM parameter specifies the number of records to sort. This is
approximated from the size of the input file, but if the input file is
large and only a few records are to be sorted, it is much more efficient
to specify it here.
The RSZ parameter specifies the maximum record size in characters. This
is required if if unformatted records with more than 132 records are to
be sorted, except when using a PCIOS file for input. If the maximum
record size is known, it is always best to specify it here.
After sort keys and parameters have been defined, a sort can be
initiated by using the 'K' option on any of the following commands:
EXTRACT, OPEN, SITE or LNSITE. ZIP uses the SORT/MERGE product to
perform all requested sorts. This code is normally non-resident to
mimimize memory use. At most one scratch file will be allocated for
a sort, so large sorts (more than 1000 tracks) are best performed
using some other product.
When a find is made, the most recent non-numeric line of text is
displayed first. This is usually the header which contains the element
name, bank name and location counter information. Nothing is displayed
prior to the current line if no non-numeric text was encountered. If the
address requested occurs within a 'LINES SKIPPED' message, the address of
the first word of data within the group is also displayed.
These commands operate only with PMD-format dumps, and require very
specific input data. If the addresses do not begin in the correct columns
or if the 'SKIPPED' messages are in a different format, it is unlikely
that the requested address will be located. The commands will not operate
if a SELECT or REFORMAT is in effect, and processing will halt if any
record is encountered which is longer than 132 characters.
The qualifier and filename are required and must match the previous
name exactly. The symbol table is erased prior to the load unless the
'M' (merge) option is given. This preserves existing symbols except when
a loaded symbol matches an existing symbol, in which case the new symbol
replaces the old.
6.1. Reserved symbols
There are two reserved symbols that cannot be defined, deleted or
saved. They can be used in REFORMAT, SELECT or KEY parameter lists.
RL$ represents the length of the current record in characters. It
is an unsigned COMP field of five characters. When used in a
7. Record selection
The SELECT command provides a powerful method to affect selection of
a subset of records from a file or element based on the contents of one
or more data fields. The format is as follows:
SEL[,opt] field comp literal AND|OR f,c,l ... Initial SELECT
SEL[,opt]+ AND|OR f,c,l ... Append more criteria
SEL? Display criteria
UNS Deactivate selection
SEL[,opt] Re-activate with
Each criteria takes the following form:
field is either start:stop,format (same as REFORMAT)
comp is one of the following:
'=' (equal) '<>' (not equal)
'<' (less than) '<=' (less than or equal)
'>' (greater than) '>=' (greater than or equal)
'*=' (contains string) '*<>' (does not contain string)
literal is either:
'quoted string' or number
SEL 1:5='@ACOB' OR 1:3='END'
SEL EMP-VAC-HRS > 0 OR EMP-SICK-HRS > 0
SEL SUB-ACCT(2) > 4 AND SUB-ACCT(2) < 13
SEL+ OR SUB-ACCT(3)=0
SEL EMP-NAME *= ', JOHN' (Select any employee with first name JOHN)
Parenthesis may also be used to specify the order of evaluation of
selection criteria. Left parenthesis may precede any complete criteria
and right parenthesis may follow any complete criteria. Parenthesis may
not be used within criteria, except as subscript delimiters. Examples:
SEL (1:3='ABC' OR 1:3='XYZ') AND 4:6='DEF'
SEL (EMP-SSN > 100000000 AND EMP-SSN < 900000000)
SEL+ AND ((EMP-VAC-HRS > 0 OR EMP-SICK-HRS > 0) OR SUB-ACCT(3) > 0)
It is important that the number of left and right parenthesis be the
same in each set of criteria supplied with SELECT or SELECT+ . It is not
possible to use SELECT+ to continue an expression which begins with un-
matched parenthesis. When it would be difficult or impossible to specify
a matched expression on a single command line, the input may be continued
using the semicolon (;). More about this in the next section.
X - Invert the selection criteria. This will select all records that
would NOT have been selected with the standard usage, and bypass
all records that would have been selected.
I - This will reestablish normal selection after the 'X' option has
been used, without the need to re-input selection criteria. These
two options can be used with complex criteria to separate an input
file into two inclusive non-overlapping subsets.
P - This option is used (without additional parameters) to establish a
"canned" selection criteria that can be used (with P!) to display
the most-often-interrogated portions of a breakpointed ECL file.
The following records will be selected:
1:1='@' (any ECL command)
OR 1:3='END' (processor status line)
OR ( 1:3=' **' AND 10:80*='SEV.' ) (COBOL error messages)
N - This will cause ZIP to remain positioned at the current record, even
if it is not selected by the new criteria. This option can be used
with either <SELECT> or <SELECT+>.
General selection rules:
1) All SELECTs work against the original (unformatted) record, even if
a REFORMAT is in effect. If a SELECT is active, each record must
meet the selection criteria before further processing is allowed.
Unselected records are not printed, written out or searched. This
applies to the following commands:
P, LNP, O, Q, LNQ, L, LC, LB, LR, F, FC, FB, FR, EXT, WRITE, SITE, LNS
2) Executing the SELECT command (or SELECT+) will position to the next
record in the file that meets the selection criteria, unless the
'N' option is used. From then on, an active SELECT establishes a
'program state' which can affect other commands (above).
4) When a RANGE of records is specified, i. e. 'P 1 100', only selected
records are processed (in this case printed) and the user is left
positioned at the last record of the range, regardless of whether or
not it was selected.
4) When a COUNT of records is specified, i. e. 'P 100', the next <n>
selected records are processed and the user is positioned at the
last record processed.
5) When positioning to a SPECIFIC record or when positioning in the
backward direction, i. e. '-100', the specific record is addressed.
It is not printed, however, if it has not been selected.
8. Command Continuation
The SELECT, REFORMAT and KEY commands allow many parameters to be
active at one time. It is often impossible to specify all desired
parameters on a single command line. One way to specify additional
parameters is with the SEL+, REF+ and KEY+ commands. This will work
in most cases, but not all. Another way to enter a large number of
parameters with these commands is by using the semicolon (;) to continue
the command onto the next input line.
Continuation is allowed only with SELECT, REFORMAT and KEY. When a
semicolon is encountered anywhere except within a quoted string, the com-
mand scan is halted at that point and a continuation line is solicited by:
Scanning resumes with the first character of the next line. Several
lines may be entered in sequence in this manner. Input is terminated and
the completed command is processed when a line is entered without a semi-
colon. The maximum allowed length of all continued lines in a group is
approximately 2000 characters. Examples:
100: SEL (10:10=2 OR 10:10=3 OR 10:10=6 OR 10:10=8 ;
C-> OR 10:10=9 OR 10:10=12) AND (14:20<>XX;YYY' OR 30:30='X' ;
C-> OR 30:30='Y' OR 30:30='Z')
200: REF 'Name = ' 10:32 ' Address = ' 40:68 ' Zipcode = ' 78:82 ;
C-> ' Phone = ' 120:128 ' Emp. ID = ' 1:9
9. Counting of selected records
When using SELECT, it may occasionally be necessary to find out how
many records in a given range (or within the whole file) match the current
selection criteria. The COUNT command provides this information with a
minimum of additional processing overhead. The command is as follows:
The parameter format is exactly the same as PRINT. The matching
count is displayed and the user is positioned at the end of the range.
The COUNT command may only be given when a SELECT is active.
10. Data extraction
The EXTRACT command is used to write out all or part of a file or
element to another file or element. The output type (file/elt) does not
have to be the same as the input type. The format and action of EXTRACT
is the same as PRINT (P), except that the output file/element must be
named directly following the command.
EXT[,opt][+|!] filename.elt/version n1 n2
The output file must exist (catalogued or assigned temporary) and if
an element/version is given it must either be empty or be a program file.
The action of this command will create a new file or element, NOT append
to existing data. If a SELECT is in effect, only those records which meet
the selection criteria are written to the output file. In all cases, only
records within the range specified are output. Examples:
EXT DATA-OUT. 1 100 Writes records 1 thru 100
EXT+ PROG1.DATA1 200 Writes the next 200 records
EXT! PROG1.DATA2/VERS1 Writes the entire file
If a REFORMAT is in effect when an EXT command is given, the normal
action is to ask the user whether formatted or unformatted records are
to be output. If the 'F' or 'U' option is given, the corresponding
record type is output without the preliminary query/response. If the
input file is a print file and formatted output records are being written,
use of the 'S' option will preserve original line spacing.
10.1 Alternate Method Data Extraction
WRITE[,opt][+|!] n1 n2
The output file must exist and meet the same conditions required for
EXTRACT. Also, it will be assigned exclusively until closed. The 'F' or
'U' option must be given with OPEN and will be the default record type
unless overridden on the WRITE command. WRITE has three other options
for printfile output: 'T' inserts a top-of-page and 'P' a laser page feed
preceding the output records. If formatted records are being written, use
of the 'S' option will preserve original line spacing.
11. Onsite printing
The SITE and LNSITE commands work the same as their counterparts
in the @ED processor. The selected range of records are written to
an internally-created file and the file is SYMmed to the desired site.
All records which exceed 132 characters (124 for LNSITE) are split into
as many output lines as required, so truncation will not occur at the
printer. Carriage control for print files is removed, as are print
control records. A user-supplied page heading is inserted in the output.
The site-id parameter defaults to PR (the onsite printer) if not given.
SITE[,opt][+|!] n1 n2 site-id
LNS[,opt][+|!] n1 n2 site-id
SITE 1 250 HOLDQ
If a SELECT is in effect, only selected records are sent to the
printer. If a REFORMAT is active, the user is asked for the type of
record to output. As with EXTRACT, the 'F' or 'U' option can be used
to omit the need for the query/response. The 'T' option can be used to
suppress the trailer page from the print file.
Output files and elements can be sorted before being written. The
KEY command specifies the sort key(s) and sort order and is specified
KEY field1[,A|,D] ... fieldn[,A|,D] Initial KEY
KEY+ fieldn+1[,A|,D] ... Append additional sort keys
KEY? Display current sort keys
field is either start:stop,format (same as REFORMAT)
The first field is required, others are optional. Each field may be
followed with either 'A' or 'D' to indicate ascending or descending sort
order. If not specified, ascending order is the default. Key fields are
always specified from most significant to least significant. If reformat-
ted records are being sorted, the key fields apply to the unformatted
record. It is not necessary that the key be contained in the reformatted
record in order to use its data to determine the sort order.
The DATA parameter specifies the character set of output records (ASCII or
Fieldata). If not given, the character set of the first record is used.
13. Processing of PMD-format printfiles
The FIND ADDRESS commands can be used when reading a printfile which
contains dump output from the PMD processor. They make it very easy to
locate specific addresses within the dump.
Starting from the current position, the input file is searched for
the next record which contains the address specified. The first column
of addresses is searched for relative addresses, the second for absolute
addresses. The address parameter must be in octal format - the leading
zero may be omitted. If address is not given, the previous value is
used. Either command can be followed with a question mark to display the
When the same file is read again with ZIP, the ZIPLIB$ file is searched for a matching set of saved symbols. If found, the symbols are restored during processor initilization. If the same set of saved symbols is desired while reading a different file (or element), the symbols can be restored to the current ZIP session with the command:
If a symbol is no longer needed, it can be removed with the UNDEFINE command. If the set of symbols is saved again, the deletion will become permanent.
The following options can be given with the SELECT command:
An alternate method of data extraction is available if it is desired to write multiple groups of records to the same output file or element. This is done with the OPEN, WRITE, and CLOSE commands.
Only one file can be open at a time. While an output file is open, the EXT, SITE and LNS commands are not allowed. All other commands remain fully functional.
Once keys have been defined, the SDEF command may optionally be used to set sort parameters. The parameters are approximated if not specified, but it is sometimes necessary and usually more efficient to use this command, as follows:
The NUM parameter specifies the number of records to sort. This is approximated from the size of the input file, but if the input file is large and only a few records are to be sorted, it is much more efficient to specify it here.
The RSZ parameter specifies the maximum record size in characters. This is required if if unformatted records with more than 132 records are to be sorted, except when using a PCIOS file for input. If the maximum record size is known, it is always best to specify it here.
After sort keys and parameters have been defined, a sort can be initiated by using the 'K' option on any of the following commands: EXTRACT, OPEN, SITE or LNSITE. ZIP uses the SORT/MERGE product to perform all requested sorts. This code is normally non-resident to mimimize memory use. At most one scratch file will be allocated for a sort, so large sorts (more than 1000 tracks) are best performed using some other product.
When a find is made, the most recent non-numeric line of text is displayed first. This is usually the header which contains the element name, bank name and location counter information. Nothing is displayed prior to the current line if no non-numeric text was encountered. If the address requested occurs within a 'LINES SKIPPED' message, the address of the first word of data within the group is also displayed.
These commands operate only with PMD-format dumps, and require very specific input data. If the addresses do not begin in the correct columns or if the 'SKIPPED' messages are in a different format, it is unlikely that the requested address will be located. The commands will not operate if a SELECT or REFORMAT is in effect, and processing will halt if any record is encountered which is longer than 132 characters.