Device Macroinstruction

Parameters

tname mname

identifies the device translation table and macroinstruction for the device class. These must match the table and macroinstruction names shown in Table 1. These cannot be changed because CP code references these names.

CCW=cmd

identifies the command code. The cmd is expressed in hex in the range X'00' to X'FF'.

DATAXFER=NO

DATAXFER=YES

indicates if the command causes a data transfer on the channel.

DIAGNOS=NO

DIAGNOS=YES

indicates if the command is a diagnostic CCW.

MULTI=NO

MULTI=YES

indicates if the command is a multitrack operation. This is an internal CP flag.

PREPROC=NO

PREPROC=YES

indicates if preprocessing is required. This is an internal CP flag.

RONLY=NO

RONLY=YES

indicates if the command is prohibited (command rejected) on a read-only device.

SEEKREQ=NO

SEEKREQ=YES

indicates if orientation is required. That is, this CCW must have been preceded in the channel program by a SEEK CCW.

SIMULATE=NO

SIMULATE=YES

indicates if CCW simulation is required. This is an internal CP flag.

SPECIAL=NO

SPECIAL=YES

indicates that further checking is required, such as:

• Certain opcodes need no data translation
• Certain opcodes must be first in the channel program
• For certain opcodes, user class is checked.

This is an internal CP flag.

STATMOD=NO

STATMOD=YES

indicates if the device can set STATUS MODIFIED.

SYSBUSY=NO

SYSBUSY=YES

indicates if the command is allowed to be issued to a tape device that is currently marked as busy with a system function such as SPXTAPE. If it is not allowed, a unit check is returned with command reject set in the sense data.

VALID=NO

VALID=YES

indicates if the command is valid. VALID=NO causes a command reject for this CCW.

MODE=LINE

MODE=FULL

MODE=BOTH

indicates the screen mode.

TYPE=WRITE

TYPE=READ

TYPE=SELECT

TYPE=CTRL

indicates type of command.

LAST=NO

LAST=YES

indicates if this is the last invocation for a particular device table. It must be specified as YES for the last invocation in order to generate a device table.