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Now downloading free:xerox 19791108 Ethernet Plans

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File name:19791108_Ethernet_Plans.pdf
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Descr: xerox notetaker memos 19791108_Ethernet_Plans.pdf
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19791108_Ethernet_Plans.pdfInter-Office Memorandum To Fairbairn, Kay, Ingalls, Goldberg, Shoch Date November 8, 1979 From Larry Tesler Location Palo Alto Subject Ethernet Plans Organization PARC/SSL XEROX Hardware Bruce and I have verified empirically that the 8086 can keep up with the burst of data at the beginning of an Ethernet packet. This includes WAITing for a packet to start, checking the destination host number for "broadcast" or "me", and storing the whole packet into main memory. \Ve had to use a software FIFO; that is, we interspersed ~AOVW instructions into the pre-REP instruction stream to keep ahead of the hardware. We may have been too conservative, so the FIFO may be able to go away in the real thing. (Note: The tests Doug and Dan did were invalid because they ANDed "broadcast" to "me" instead of ~R

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