davely@mcrware.UUCP (Dave Lyons) (11/08/89)
I'm looking for any information available on how to enable/disable/ flush the 64K cache on a 386 PC/AT compatible. The particular machine we have is a Gateway 2000. Please e-mail me any information you might have as I don't regularly read this group. Thanks for any help, Dave Lyons -- Dave Lyons - ...!sun!mcrware!davely | On Second though let's not go to My employer laughs at my opinions. | Camelot... 'Tis a silly place -------------------------------------------------------------------------
jrh@mustang.dell.com (jrh) (11/08/89)
Most 386 systems that use the Intel 82385 cache controller will allow an application to disable the cache. In general, to avoid caching a memory space, make sure the highest bit of any address (A31) is high. This will help with adapters with memory-mapping, with page swapping or dual-port memory schemes which may not like the memory space on the I/O channel being cached. Because A31 does not go to the I/O channel and other address lines are the same, the adapter will respond normally. ------------------------------------------------------------------------- James R. Howard !s: cs.utexas.edu!dell!mustang!jrh