Z80 CPU Pin Description: _________ _________ _| \__/ |_ A11 |_|1 40|_| A10 _| |_ A12 |_|2 39|_| A9 _| |_ A13 |_|3 Z80 CPU 38|_| A8 _| |_ A14 |_|4 37|_| A7 _| |_ A15 |_|5 36|_| A6 _| |_ CLK |_|6 35|_| A5 _| |_ D4 |_|7 34|_| A4 _| |_ D3 |_|8 33|_| A3 _| |_ D5 |_|9 32|_| A2 _| |_ D6 |_|10 31|_| A1 _| |_ VCC |_|11 30|_| A0 _| |_ D2 |_|12 29|_| GND _| |_ D7 |_|13 28|_| /RFSH _| |_ D0 |_|14 27|_| /M1 _| |_ D1 |_|15 26|_| /RESET _| |_ /INT |_|16 25|_| /BUSRQ _| |_ /NMI |_|17 24|_| /WAIT _| |_ /HALT |_|18 23|_| /BUSAK _| |_ /MREQ |_|19 22|_| /WR _| |_ /IORQ |_|20 21|_| /RD |______________________|