SVC 25 (0A19)
TRKBAL macro - is type 3, gets no lock.
Calls module IGC0002E.
- R15 and R0
- No applicable data.
- R1
- Address of the associated DCB. If R1 is negative, the address is in complement form and the DCBFDAD and DCBTRBAL fields of the DCB are meaningless.
| DDNAME | cccccccc | Name of the associated DD statement. |
| DCBFDAD | xxxxxxxx | Full direct access address (MBBCCHHR) from the DCB that is pointed to by R1. |
| DCBTRBAL | xxxx | Track balance (number of bytes remaining on the current track after a write; negative if no bytes remain). |