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- ID:IC IBM CACHE considerations.
- DESQview/QEMM Technical Note
- by Stan Young
-
- IBM Cache: The IBM Cache uses exTENDed memory (not exPANDed)
- and if loaded after our Expanded memory manager (QEMM), will not
- see any memory if you have not taken steps to reserve some
- extended memory for the use of the cache.
-
- If you load the cache first, it will see and use extended memory,
- but if QEMM is loaded after it, the cache is confused by the
- memory mapping done by QEMM and this will result in disk errors.
- Therefore, you should be sure you are loading IBMCACHE after
- QEMM.SYS.
-
- If you are using the IBM Cache on a 386 PS/2 with QEMM, load QEMM
- first and use the "EXTMEM" or "MEMORY" option to reserve the
- amount of memory you want to allocate to the cache. Then load
- the cache, allocating to it the amount of memory you have
- reserved. Loaded in this fashion, the cache should operate
- properly.
-
- This configuration should also be followed if loading other
- caches that use extended memory on the PS/2. Naturally, if you
- use a cache that uses exPANDed memory, you would have to load the
- cache after QEMM and you would not need to reserve any exTENDed
- memory.
- Copyright (C) 1991 by Quarterdeck Office Systems
- * * * E N D O F F I L E * * *