Service Manuals, User Guides, Schematic Diagrams or docs for : xerox notetaker memos 19791208_NoteTaker2_Electronics_Changes

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19791208_NoteTaker2_Electronics_Changes


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                                                        XERO*--
                                             PALO ALTO RESEARCH CENTER
                                                Systems Science Laboratory
                                                     LSI Systems Area
                                                     December 8, 1979

                                                  For Xerox Internal Use Only

       To:                  Distribution

       From:                Doug Fairbairn
       ::)ubject:           NoteTaker2 Electronics Changes

       stored: (fairbairn> NT2ElectronicsChanges.memo



    We are about to start on the redesign of the electronics for NoteTaker2. T have identified a number
    of areas which I feel changes are called for and those are outlined below. I want to stimulate somc
    lively but short-tenn discussion. 'rVe need to settle these issues as soon as possible so the detailed
    design can proceed. The ideas will be presented and discussed with the SPG personnel on Monday,
    Dec. lOth. During the week of the 17th, I would like the interested parties in LRG to get together
    with the SPG people and work out the details. I am targeting the end of the year as discussion cut-
    off time. After that there will be a strong resistance to any substantive changes. We will publish
    the results of our discussions in El Segundo and everyone should feel free to let their opinions be
    known on any of these issues.

    Architecture

   11le major changes in this area involve the structure of the 110 system and the protocols on the
   System Bus. Before I get into the details let me review the overall state of the system. The
   machine has 9 board slots, all of which are wired the same. The proposed "standard configuration"
   is as follows:

",.L             Processor module (2) - 8086 processor, 12K bytes of EPROM or RAM.             111ese can be
~
   .;



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