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VSE DTFDI MVS DCB DSORG=PS
DEVADDR = SYSxxx DDname (in DD statement)
IOAREA1 = xxxxxxxx BUFNO = 1
or
IOAREA! = xxxxxxxx BUFNO = 2 or more
IOAREA2 = xxxxxxxx
EOFADDR = xxxxxxxx EODAD = xxxxxxxx
ERROPT = xxxxxxxx SYNAD = xxxxxxxx
ERROPI = IGNORE EROPI = ACC
SKIP SKP
ABE
MACRF =(G...)
= (p...)
RECFM = FA
= FM
BLKSIZE = nnnn
IOREG = (r) MACRF = (..L..)
RECSIZE = nnn LRECL = nn
SEPASMB = YES User must code the DCB
WLERR = xxxxxxxx SYNAD = xxxxxxxx
Figure 37. Comparison of DTFDI and DCB macros
13.2.6.9 LIOCS Console File Definition
The DTFCN has no equivalent in MVS because reading and writing via the
console is not handled at the GET/PUT level. MVS provides the WTO macro for
writing on the console and the WTOR macro for writing a message and reading a
reply. Therefore, you must replace a PUT macro for the console by either a WTO
macro to display a message or a WTOR macro for displaying a message and
reading a reply.
Do not display messages on the console unless they are necessary. The system
writes many messages to the operator, and extra messages could lead to
confusion and hinder the performance of the installation.
MVS WTO
WTOR
′ message′
′ message′, reply address, reply length, ecbaddress
(2-12) (2-12) (2-12)
13.2.6.10 LIOCS Sequential File Definition on Direct Access
Devices
Devices In VSE and MVS, sequential DASD files are processed in the same way.
OPEN Macro
VSE OPEN(R) filename ,...
(r1)
MVS OPEN dcbaddress , option1, option2 ,...
(2-12)
304 VSE to OS/390 Migration Workbook