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To: Daniel Schuh who wrote (17218)	2/7/1998 2:16:00 PM
From: K. M. Strickler	Read Replies (1) \| Respond to of 24154

In the disks that I have looked at, there IS a head per surface, ie the heads don't change platters! The alignment would be between the head and the surface at the time of formatting, and should not change. In the 60's, IBM had what we called the 'motherfile' which did read all bus bits simultaneously, but in that mode, due to the slow speed of the processor (by todays standards), that was all it could do! (Of course with memory in the 500K-1M range, it didn't take long to 'fill-er-up'! I don't know what the added electronics would cost, and that might make it cost prohibitive! Maybe wrong term 'embedded'! I need term representing the many systems that have been bought and paid for that are sitting being used currently! Are those the legacy systems? OK - replace embedded with legacy! The MMX channel is what the AGP (I assume that is Accelerated Graphics Processor) uses instead of requesting the CPU to download. I think that it 'cycle steals' but I'm not sure! (Help anyone?) As for BUS Mastering, isn't that where the disk complex 'cycle steals' to load memory? Maybe it also can 'hold off' the CPU under certain conditions? Better? Ken