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           HP 13255
PROCESSOR (808uA-2) MODULE

~.nual   Part NO. 13255-91209

            PRIHTED

           APR-26-78




                                rllO-   HEWLETT
                                ~~ PACKARD
           HP 13255

PROCESSOR (808uA-2) MODULE

~.nual   Part NO. 13255-91209

            PRIHTED
           APR-26-78




                                r~3    HEWLETT
                                ~!tI   PACKARD
                                      HP 13255
                            PROCESSOR (8080A-2) MODULE
                            ~.nual   Part NO. 13255-91209
                                        PRIHTED
                                      APR-26-78




----~--~-------------~--~-----------~-~--------~-~-~-------~--------~------~-~~-
                                       NOTICE
      The Information contained in this document Is subject to change
      without notice.
      HEWLETT-PACKARD MAKES NO WARRANTY' OF AHY KIND WITH REGARD TO THIS
      MATERIAL, INCLUDING, BUT NOT LIMITED TO THE IMPLIED WARRANTIES or
      MERCHANTABILIT~ AND rIT~ESS FOR A PARTICULAR PURPOSE. Hewlett-Pac~ard
      shall not be liaole for errors contained herein or for incidental or
      consequential da~a~es In connection with the furn1shlng, performance,
      or use of this material.
      This docu~ent contains proprietary information which is protectec by
      copyright. All rights are reserved. NO part of this document may be
      photocopied or reproduced Without the prior written consent of Hewlett-
      Packard company.

-------~~-----------~----~---------------~--~-----------~-----------~-----------
                   Copyright c 1976 by HEWLETT-PACKARD CO~PANY


         ~OTE:   This document Is part Of the 264XX DATA TERMINAL Droduct
                 series Technical Information Package (HP 13255).
,13255                                                                                     13255-91209/02
0roc~ssor    (S080A-2) Module                                                              Rev  APR-26-78




1.0         INTRODUCTION.
            Th~ Procpssor C~OdOA-2) ~Odule funct1on. as the ~a1n control11nq un1t
            for tne termlnal. The processor fetches InstructIons from me_ory ~nd
            perfor~s 1/0 operations on otner mOdule. attached to the termInal data
            bUS (8ackplane Assembly). The 8080A-2 Pr~ces,or MOdule has the capa-
            blllty of accesslnQ e1tner t~@ standard baCKplane bus or a speclal top
            ~lane bus defined later In tnis sectlon.



2.0         OPERATING   PARA~

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