From: ohland@charter.net   
      
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   1.2.9 8556/8557-SX SYSTEM BOARD FRU P/N84F7994   
      
         Record number:        H05753   
      
           Device:               D/T8556   
           Model:                M   
           Part number:          P/N84F7994   
           Tip key:              005   
           Date created:         O92/06/30   
           Date last altered:    A92/06/30   
      
         Currently, the Medialess Models ( 14X and 24X ) of the Machine   
         Type 8556 have a unique FRU for the System Board - P/N79F7211.   
         This is being changed to incorporate the Support of these   
         Models into the standard 8556/'57 System Board FRU P/N84F7994;   
         as common practice on other Medialess versions of the PS/2   
         Family.   
         As there has been no change of FRU P/N to allow Field Stock to   
         be easily moved to a common "higher" FRU, the existing stock of   
         FRU P/N84F7994 having to be re-levelled. This may take some time   
         to complete, so the following information can be used as a guide   
         in understanding what can be used in which machines:   
      
         FRU P/N79F7211 - Can be used ONLY in the Medialess System, those   
                          with Remote IPL T/R or E'Net cards and no DASD.   
      
         FRU P/N84F7994 - Will ALWAYS be able to support the standard   
                          Models ( those with DASD ) of the 8556 and 8557   
                          386SX Processors.   
                          As from WK25/92, Greenock have been shipping   
                          this FRU at a level which will support the   
                          Medialess Models also. This level of FRU can be   
                          recognised by having either Card Assy part no.   
                          92F2515 or 92F2498 ( rework level equivalent )   
                          within it. Numerically higher P/N's which may   
                          replace them, will also continue support.   
      
         Use should be made of FRU P/N79F7211 until stock is exhausted,   
         before ensuring the content of FRU P/N84F7994 has been upgraded   
         so it can be used. In the event of Supply difficulties, an order   
         should be placed directly on Greenock Plant for P/N92F2515 (this   
         P/N will be unknown to Country Stockrooms)   
      
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