GPIO extension

XD82C55-5Programmable parallel port conversion chip DIP-40 4.75V-5.25V 3 8 5M Datasheet
XP71055Parallel port conversion chip PLCC-44 4.75V-5.25V 3 8 10M Datasheet
XL8574ATMI/O port extender SOP-16 - - - - Datasheet
XL8574TMI/O port extender SOP-16 - - - - Datasheet
XD71055Parallel port conversion chip DIP-40 4.75V-5.25V 3 8 10M Datasheet