Guardian Procedure Calls Reference Manual (G06.25+)

Guardian Procedure Calls (S)
Guardian Procedure Calls Reference Manual—522629-013
14-98
SETMODE Procedure
162 Override System Compression Default on 5190 Cartridge Tape
param1 = 1 No data compression
= 2 Data compression (IDRC)
param2 is not used with function 162.
Users of unlabeled tapes who do not want to use the default compression
setting can use SETMODE 162 to override the default setting. BACKUP and
FUP do not support this operation. This operation is allowed only at the
beginning of tape (BOT). For more information about the 5190 Cartridge
Tape Subsystem, see the
5190 Cartridge Tape Subsystem Manual
163 SNAX:Enhanced CDI mode
param1 = 0 enables normal mode (disables all enhanced CDI
support).
= 1 enables enhanced CDI mode.
= 2 enables special WRITEREAD mode (allows
applications to determine the setting of CDI by using the
WRITEREAD procedure; using WRITEREAD causes
the outbound data buffer to be sent with CDI enabled).
param2 is not used with function 163.
A SETMODE 163 call applies only to the opener, not to the device that is
opened; another SETMODE 163 call must be made if the file is closed.
Enhanced CDI mode is supported only by the SNAX/XF and SNAX/CDF
products. For more information about enhanced CDI mode, see the
SNAX/XF Application Programming Manual and the SNAX/CDF Application
Programming Manual.
Table 14-4. SETMODE Functions (page 31 of 34)
function Parameters and Effect