I've been reading the datasheet for the Z80 PIO chip a lot in the last few weeks, and I still don't fully understand what it's supposed to do. Take this diagram, from the Z80 CPU datasheet: …

Figure 1. The Z80 computer. (Click to enlarge.) Source: Z80.info. The linked article and schematic are worth a read. Is there a standard way of achieving multiple PIOs being controlled by the …

Nov 9, 2017 · Great Z80 project goes on with I/O accesses, finding a way to bring 6522 to life every time the Z80 does an *I/O cycle. 6522's CLK2 pin is driven: We can easily substitute the …

Feb 16, 2013 · Alternatively, you can replace the uart with a z80 pio chip to communicate with a modern parallel mode LCD character display. It won't really do graphics, but it's easy to use …

Yes I'm sure: Z80 can execute continuously NOOP, from the begin to the end, without need other than Power supply, CLOCK running, RESET High, WAIT High, HALT High, BUSREQ High, …

May 12, 2012 · The original Z80 was produced in the older NMOS technology, the Z84C00 is its CMOS version. The CMOS version is able to run at higher clock frequencies. The …

The address bus of the Z80 is 16-bits wide (bits A0 through A15), meaning it can address 65536 locations. The low 8 bits of the bus are bits A0-A7, which can address 256 locations. Each of …

Jul 18, 2019 · It can also mean 'Parallel I/O' where data is sent as a group of bits in parallel over several wires at once as opposed to serially over a single wire. One example of this is the Z80 …

Jan 18, 2018 · The software works (I tried it on my Z80 board which is almost identical to yours) but you should add a delay at startup to ensure that all peripherals are stable before the CPU …

What exactly does the Z80 PIO do? I've been reading the datasheet for the Z80 PIO chip a lot in the last few weeks, and I still don't fully understand what it's supposed to do. Take this …