SEQPDL parameter
Minimum PDL available for sequencer
Summary
- Default value
- 4096
- Parameter type
- Utable
- Where set
- On user's parameter line or reset by UTABLE command
- Related products
- All
- Introduced
- Model 204 version 7.5
Description
The SEQPDL parameter controls the amount of free space that must be present in the user's Push Down List in order for the SOUL sequencer to proceed with the next quad code.
The minumum and default value of SEQPDL is 4096 bytes. The maximum value is 8192 bytes. SEQPDL is a user resettable parameter and can be set on the user's parameter line or reset by the UTABLE command. The old value, 1024, was hardcoded internally in the Model 204 nucleus. With 1024 bytes there were edge cases where abends would break files. SEQPDL is provided to allow enough PDL space so that all of the lower level journaling routines can process error conditions without breaking files.
Note: In order to avoid getting ERROR 2126 USER'S PUSHDOWN LIST OVERFLOWED, you might need to increase the User Push Down List (using UTABLE LPDLST) by up to 3072 bytes, or more if you specify a value for SEQPDL that is larger than the 4096 default value.