IBF is an active-------- output signal for 8255

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• 8255 sets INTR when STB'=-----,IBF=---------,INTE=--------,for input conrol signals
• to configure 8255 with port A output,Port B input port C lower output and port C upper input
• Upon activation of------ signal,output device reads data from output port and acknowledges it
• for i/o of 8255,if -----, the word is taken as a bit set/rest word
• on activation of ----, 8255 loads data from the input port lines into the input buffer of that port
• 8255 has three ----parrallel port
• 8255 has -------- i/o pins
• 8255 has three ----parallel ports
• In 8255 ,BSR means -----
• 8255 has ----i/o modes