From: jungletrain@outlook.com   
      
   On Friday, January 13, 2023 at 6:59:31 AM UTC-8, Louis Ohland wrote:   
   > R/W Port for Ext Config Data (VPD) page 215    
   >    
   > POS[3]   
   > Louis Ohland wrote:    
   > > Micro Channel Adapter Requirements page 214    
   > >    
   > > Christian Holzapfel wrote:    
   > >> Louis Ohland schrieb am Freitag, 13. Januar 2023 um 02:28:36 UTC+1:    
   > >>> One fact overlooked when considering the plentiful RS/6000 configuration    
   > >>> choices is that while PS/2 systems have 8 slots, RS/6000 may have over 8    
   > >>> slots.    
   > >>>    
   > >>> Ever consider why the Server 195 / 295 has two sets of slots, 8 slots    
   > >>> and 4 slots?    
   > >>    
   > >> RS/6000 systems *may* have many IOU (input/output) or XIO (extended    
   > >> input/output) modules with their own IOCC (I/O channel control unit),    
   > >> each controlling up to 8 Micro Channel slots.    
   > >> See SA23-2647-00 POWERstation and POWERserver - Hardware Technical    
   > >> Information - General Architectures, section 1-8, Figure 3 "Fourth    
   > >> Processor Chip Set".    
   > >> https://ardent-tool.com/RS6000/docs/pdf/SA23-2643-03_RS6000   
   Hardware_Technical_Information_General_Architectures_1993.pdf    
   > >>    
   > >>    
   > >> My guess is that each IOCC has its own NVRAM.    
   > >>   
   Chet Heath   
      
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