mcm@maple.ucsb.edu (Marcelo Mourier) (09/17/90)
Hi everybody! Here's another question regarding PC Minix. Does anybody know if the Chips & Technology ISA chip-set used in most AT/386 motherboards solved the early problem of the DMA controller hardware not being able to read/write across a 64k physical address boundary..? If this is the case, it wouldn't be necessary to throw away those buffers in the cache that lay across a 64k boundary. Of course this would help only in 32-bit Minix, where the size of the buffer cache is big enough that it spans several 64k boundaries. Marcelo - mcm@cs.ucsb.edu -- Marcelo Mourier (mcm@cs.ucsb.edu)