Before the LOADSYS 320K_.------------------_ I I I I I I , l I All Storage Addressable by Virtual ftachine I ,. CftS virtual ftachine without a la.ed Seg.ent Attached
AfterLOADSYS Function
_ ______ ____ _
448K_.------------------------,I Discontiguous Storage I Addressable by Virtual I ftachine .///////////////////////// . • /Storage lot Addressable/ • • ///by Virtual ftachine//// • . /////////////////////////. 320K I • I l I I I I I Storage Still I I Addressable by I I Virtual ftachine I I I I , , , OK' I CftS Virtual ftachine with a la.ed Seg.ent Attached Before and After a LOADSYS Function When you save a na.ed seg.ent that is later loaded by the LOADSYS function, you .ust be sure that the addresses at which seg.ents are
saved are correct and that they do not overlayrequired areas of storage
in the virtual .achine. This is crucial because theLOADSYS function
invokes thePURGESYS function before it builds the new page and swap tables. CP purges all saved syste.s that are overlayed in any way by
the saved syste. it is loading.1 condition code of 0 in the PSW indicates that the na.ed seg.ent was loaded successfully; the Rx register contains the load address. A condition code of 1 in the PSi indicates the na.ed seg.ent was loaded successfully within the defined storage of the virtual .achine.
TheRx register contains the address at which the na.ed seg.ent was loaded. The Ry register contains the ending address of the storage
released before the na.ed segmentWas loaded.
Bote:CftS only allows naaed segments to be attached beyond the defined
size of the virtual .achine.A condition code of 2 in the PSi indicates the LOADSYS function did
not execute successfully.Examine the return code in the Ry register to
deter.ine the cause of the error.
Return Code---"4--- 177 fteani,!!g Ba.ed seg.ent does not exist
PagingI/O errors When the PURGESYS function
associated page andswap is executed; CP
tables, that
releases the storage, and
were acquiredwhen the
1-68IB! V!/370 Syste. Logic and Problem Deter.ination--Volu.e 1
After
_ ______
448K_.------------------------,
saved are correct and that they do not overlay
in the virtual .achine. This is crucial because the
invokes the
the saved syste. it is loading.
The
released before the na.ed segment
Bote:
size of the virtual .achine.
not execute successfully.
deter.ine the cause of the error.
Return Code
Paging
associated page and
tables, that
releases the storage, and
were acquired
1-68