C:\ 8255 I/O
The 8255 is a general purpose programmable I/O device designed for use with microprocessors. It has 24 I/O pins which may be individually programmed in 2 groups of 12 and used in 3 major modes of operation. In the first mode (MODE 0), each groups of 12 I/O pins may be programed in sets of […]
C:\ Z80 PIO
The Z80 PIO is a general purpose parallel input/output port device with two programmable independent 8-bit ports, which provides a direct interface between the Z80 microprocessor and peripheral devices. This PIO provides excellent data transfer processing by the interrupt and allows the interrupt in mode 2 of MPU.