DE1 Control Panel

--- Quote Start ---

https://alteraforum.com/forum/attachment.php?attachmentid=14569&stc=1

this block schematic when i program and test input using switch and output using seven segment..

when i represent 1 number convert to bcd will be 0000 but seven segment as output not represent 1.

Seven segment to be a=1,b=0,c=0, d=1,e=1,f=1,g=1

i want result a=0,b=1,c=1,d=0,e=0,f=0,g=0

what wrong with my seven segment

--- Quote End ---

The HEX display segment drivers on the DE1 card are ACTIVE LO, so driving out a '0' (low) turns the segment ON, and driving out a '1' (high) turns the segment off.

The 74246 block you have in your schematic drives its outputs LO when it wants to light a segment, so that would mean the inverters you have on each output line are the source of the issue.