Devices supported |
All |
DASD only |
Processors supported |
All |
EXCP and EXCPVR are only supported on a zEnterprise® 196 (z196) zEnterprise 114 (z114) or
higher processor |
Command set |
All commands for all currently supported devices |
Subset of DASD commands |
Maximum channel program size |
No limit |
240 bytes because of the TCA size limit |
Maximum data transferred per CCW or TCW |
64 KB-1 |
64 KB, 2 MB, or 4 GB, depending on the processor |
Read and write commands in the same channel
program |
Yes |
No |
Skip on read |
CCW or MIDAW skip bit |
TIDAW skip bit |
Indirect addressing |
IDAL, MIDAL |
TIDAL |
Data Chaining |
Yes |
No, but TIDAL is equivalent to data
chaining. |
Status modifier/search commands |
Yes |
No |
Program controlled interrupt (PCI) |
Yes |
No |
Append to running channel program |
Yes |
No |
Self-modifying channel programs |
Yes |
No |
VIO data sets |
Yes |
No |