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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 * * *