Altera Quartus Megacore of A8255 (3x8Bit PIO). Published by Altera for free after the IP Megacore portfolio has changed.
File list:
A8255
....\A8255.csf
....\A8255.psf
....\A8255.ssf
....\A8255.VHD
....\A8255TB.VHD
....\A8255TOP.VHD
....\Altera Reference Design License Agreement.TXT
....\cmp_state.ini
....\CNTL_LOG.VHD
....\Debug.fsf
....\DOUT_MUX.VHD
....\ds8255.pdf
....\PORTAIN.VHD
....\PORTAOUT.VHD
....\PORTBIN.VHD
....\PORTBOUT.VHD
....\PORTCOUT.VHD
....\Release.fsf
....\tb_A8251.vhd
....\tb_A8251_top.vhd