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VSE DTFPR MVS DCB DSORG=PS
DEVADDR = SYSxxx DDname (in DD statement)
IOAREA1 = xxxxxxxx BUFNO = 1,MACRF =(..M..)
or
IOAREA1 = xxxxxxxx BUFNO = 2 or more
1OAREA2 = xxxxxxxx
ASOCFLE = xxxxxxxx UNIT=AFF=ddname (in DD statement)
BIKSIZE = nnn BLKSIZE = nnn
CONTROL = YES MACRF = (PC)
CTLCHR = YES RECFM = (..A)
ASA (...M)
DEVICE = nnnn UNIT = (in DD statement ) (1)
ERROPT = xxxxxxxx SYNAD = xxxxxxxx
FUNC = xxxx DEVD=(..,..,..,FUNC = xxxxxx)
IOREG =(r) MACRF= (..L..)
PRINTOV = YES Use PRTOV
RECFORM = xxxxxx RECFM = xxx
RECSIZE = (r) LRECL = nn (2)
SEPASMB = YES User must code the DCB
WORKA = YES MACRF = (..M..)
1. By specifying UNIT= you are using dedicated I/O. A preferable
alternative is to use SYSOUT=A.
2. For output of undefined records, you must provide the length
of the records in a two-byte field (DCBLRECL) within the DCB.
LRECL must be provided for fixed-length and variable-length
records.
Figure 34. Comparison of the DTFPR and DCB Macros
13.2.6.7 LIOCS Tape File Definition
In VSE and MVS, you process sequential tape files in the same way.
OPEN Macro
Options
Option 1 Option 2
QSAM INPUT ,REREAD
OUTPUT ,LEAVE
RDBACK ,DISP
INPUT ,REREAD
OUTPUT ,LEAVE
BSAM RDBACK ,DISP
INOUT
OUTIN
VSE OPEN(R) filename ,...
(rl)
MVS OPEN dcbaddress , (options) ....
(2-12)
Chapter 13. Assembler 297