httpproxy.gopherspace.dk:75/1/proxy/https://bitsavers.org/pdf/ibm/370/fe/3125/

       Index of /pdf/ibm/370/fe/3125
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   DIR /pdf/ibm/370/fe
       SY33-1058-1_3125_Processing_Unit_Microinstructions_Oct73.pdf
       SY33-1059-1_3125_Processing_Unit_General_Information_Oct73.pdf
       SY33-1063-1_3125_Processing_Unit_Input_Output_Processor_Nov73.pdf
       SY33-1067-1_3125_Processing_Unit_Muliplexer_Channel_Aug73.pdf