Redefine system parameters. If no codes are specified, the default values are displayed. The following codes are allowed:

`LSEG:`- disc sector length
`INTREL:`- number of integers per REAL*8 word
`IVECT=0:`- scalar machine
`IVECT=1:`- vector machine
`MINVEC:`- call MXMB in coupling coefficient routines if vector length larger than this value.
`IBANK:`- number of memory banks for vector machines. If IBANK1, vector strides which are multiples of IBANK are avoided where appropriate.
`LTRACK:`- number of REAL*8 words per track or block (for file allocation)
`LTR:`- determines how matrices are stored on disc. If LTR=LSEG, all matrices start at sector boundaries (which optimizes I/O), but unused space is between matrices (both on disc and in core). With LTR=1 all matrices are stored dense. This might increase I/O if much paging is necessary, but reduce I/O if everything fits in core.
`NCPUS:`- Maximum number of CPUs to be used in multitasking.

molpro@molpro.net 2019-03-22