🚀 go-pugleaf

FPGA's or PLD's are probably not going to save you any money unless 
you count on saving significant board space.  FPGA's are particularly
expensive.  By comparing against "loadable" addresses, do you mean
permanent stored addresses or changeable address?  Anyway, a 24 bit 
address could be considered two twelve bit words and you could use
either two EPROMS (for permanent address comparison) or two RAMS.
Store the addresses as two twelve bit words in hi and low RAM/ROM and
let the hi RAM/ROM output two of the bits and the lo RAM/ROM output
the other two.  See what I mean?  It'd probably be cheaper than PLD.