bit_add.ucf

this programs gives the fuctionality of 1 bit adder

#PACE: Start of Constraints generated by PACE

#PACE: Start of PACE I/O Pin Assignments
NET "a"  LOC = "p21" | IOSTANDARD = LVTTL ;
NET "cin"  LOC = "p27" | IOSTANDARD = LVTTL ;
NET "cout"  LOC = "p20" | IOSTANDARD = LVTTL ;
NET "s"  LOC = "p26" | IOSTANDARD = LVTTL ;

#PACE: Start of PACE Area Constraints

#PACE: Start of PACE Prohibit Constraints

#PACE: End of Constraints generated by PACE