IBM S544-5285-01 manual Carriage controls, Fixed-length files, Understanding how Ansi

Note 1: These combinations are possible only if a				file	contains a
with	a string that indicates a different code				set than
For	EBCDIC data with	ASCII	newlines,'0320202020200Ause X	'.
For	ASCII data with	EBCDIC	newlines,'03404040404025use X	'.

ŸFixed-length files

Fixed-length files contain records that are all the same length. separators or prefixes or self-identifying information exists th record length. You must know the record length and use the

FILEFORMAT =RECORD, nnn control statement, nnnwhererepresents the length of each record.

For	variable-		and	fixed-length	files	using	length	prefixes, MO:DCA	struc
are	treated		as	a special case. All such structured fields are se
contain		their	own	length. They	need	not	contain	a length prefix	to b
interpreted, but				will be processed correctly if there is a length
Understanding how ANSI	and	machine	carriage controls		are	used

In many environments (including IBM mainframes and most minicomputers), printable data normally contains a carriage control character. The carr character acts as a vertical tab command to position the paper at page, at a specified line on the page, or to control skipping to t characters can be one of two types: ANSI carriage control or machin control.

ŸANSI carriage control characters

The most universal carriage control is ANSI, which consists of a character that is a prefix for the print line. The standard are:

ANSI	Command
space	Single space the line and print
0	Double space the line and print
-	Triple		space	the		line	and	print
+	Don't	space		the		line and print
1	Skip	to	channel		1	(the	top	of the	form, by convention)
2-9	Skip to hardware-defined position on the page
A,B,C	Defined		by	a	vertical		tab	record	or FCB

Note	that	all	ANSI control
the line		is	printed. ANSI
(CCTYPE	=A	) or in ASCII CCTYPE(

Ÿ Machine carriage control characters

characters perform the required spac controls may be encoded in EBCDIC

=Z ).

Machine carriage controls were originally the actual hardware co commands for IBM printers, and are often used on non-IBM systems Machine controls are literal values, not symbols. They are not re as characters in any encoding and, therefore, machine controls translated. Typical machine controls are:

Appendix A. Helpful Hints181