The Z8O Parallel I/O (PlO) Circuit is a programmable, two-port device that provides a TTL-compatible interface between peripheral devices and the Z80-GPU. The CPU can configure the Z8O-PIO to interface with a wide range of peripheral devices with no other external logic required, Typical peripheral devices that are fully compatible with the Z80-PIO include most keyboards, paper tape readers, and punches, printers, PROM programmers, etc. The Z8O-PIO is packaged in a 40-pin DIP, a 44-pin PLCC, or a 44-pin OFP. NMOS and CMOS versions are also available.
