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Flex_Instruction_Set_Programming_Manual_Oct92


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                                      DOCUMENT INFORMATION
                     This Page provides a sequential record of changes for a multi-page drawing.
                         All pages shall carry the same revision letter as shown on this page.

            Title:   FLEX INSTRUCTION SET PROGRAMMING MANUAL

      Written By:    Ubby Bagley
          Model:     C2250A/

Part Numbers:
 Supersedes:                                                 ( 5959-3909. DOC        )
  Doc. Users:        ER:48     DjH:                                 Jwinword 2.0 - 0]
      Primary:
  Secondary:

                                             REVISION HISTORY

Rev                          Revision Description                       Date             Approved by:            MF
A       AS ISSUED                                                     10/02/92




                                                                                                   rI'3        HEWLETT
         DATE: 11/17/92          DWG. NO:       A-5959-3909-1              PAGE 1 OF 207           It.!.'rJI   PACKARD
                                                     rei HEWLETT
                                                     ~... PACKARD




                      FLEX INSTRUCTION SET
                       Programming Manual




                                                              rI3 HEWLETT
DATE: 11/17/92   DWG. NO:   A-S9S9-3909-1   PAGE 2 OF 207     ~ PACKARD
                                                         FLEX INSTRUCTION SET
                                                                Programming Manual




                         P.O. BOX 39, BOISE, IDAHO 83707, USA




Part No.
A-5959-3909 -1                                                       Printed In U.S.A.




                                                                              ...... HEWLETT
                                                                              ~ PACKARD
     DATE: 11/17/92   DWG. NO:   A-5959-3909-1          PAGE 3 OF 207
TABLE OF CONTENTS                                                                                                        PAGE
             1.0 RELATED DOCUMENTS .................................................................................8
      2.0 INTRODUCTION ............................................................................................................9

3.0 COMMUNICATION SYSTEM MODEL. ....................................................................................... 10
      3.1 TRANSACTION STRUCTURE ....................................................................................... 10
      3.2 TRANSACTION MESSAGES ......................................................................................... 11
             3.2.1 Command Messages .................................................................................... 11
             3.2.2 Execution Messages..................................................................................... 11
             3.2.3 Reporting Messages ..................................................................................... 11
             3.2.4 Transparent Messages ................................................................................. 12
      3.3 DEVICE OPERATION AND TRANSACTION SEQUENCE RELATJONSHIP ................ 13
            3.4 ,?OWER-ON SEQUENCE .............................................................................................. 14
            3.5 DIAGNOSTIC SEQUENCE (SELF TEST) ..................................................................... 15
            3.6 STATUS INFORMATION ............................................................................................... 16
            3.7 COMMAND PIPEUNING AND SEEK REORDERING .................................................. 18
            3.8 RESOURCE LOCKING .................................................................................................. 19
                        3.8.1 Event Queuing/Lock Release Notification .................................................. 19
                        3.8.2 Non responding Host Processing (NRH) .................................................... 19
            3.9 OPTIMAL COMMAND SEQUENCE .............................................................................. 20
            3.10 LOGICAL VS PHYSICAL ADDRESSiNG ..................................................................... 21
            3.11 DRIVE STATE DIAGRAM .............................................................................................22
            3.12 MULTIPLE MECHANISM DEVICES ............................................................................23

4.0 DEVICE COMMANDS .................................................................................................................24
        4.1 LOCATE AND READ ......................................................................................................24
        4.2 LOCATE AND WRITE ....................................................................................................25
        4.3 SET UNIT .......................................................................................................................26
        4.4 SET ADDRESS ..............................................................................................................27
       4.5 SET LENGTH .................................................................................................................28
       4.6 NO OP ............................................................................................................................29
       4.7 SET MECHANISM .........................................................................................................30
       4.8 EXTENDED DESCRIBE .................................................................................................31
       4.8 EXTENDED DESCRIBE (CONTINUED): ...................................................................... 32
       4.9 INITIAUZE MEDIA .........................................................................................................52
       4.10 SPARE BLOCK ............................................................................................................54
       4.11 LOCATE AND VERIFY .................................................................................................56
       4.12 INITIATE UTIUTY.........................................................................................................57
       4.13 INITIATE DIAGNOSTIC ...............................................................................................58
       4.14 REQUEST STATUS .....................................................................................................59
       4.15 SET DEVICE LOCK .....................................................................................................59
       4.16 DELETE DEVI



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