Index of /pdf/hp/21xx/interfaces/_firmware
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   DIR /pdf/hp/21xx/interfaces
   BIN 91750-80008_12825A_-_12826B_2716.BIN
   BIN 91750-80009_12825A_-_12826B_2732A.BIN
   BIN Custom_PSI_ROM_from_12826B_2764.BIN