Iīm studying Z80 micro and i was thinking to make a cigare machine simulation to a homework. I donīt know if you want/can help me on this, the request of the program are: - 7 different coins (25,50,100,200,500,1000,2000),inputs by Pio+Int port B - 7 different mark of cigares, input by Pio port A - and respective out to the cigares come out- the machine has to give exchanges - while machine itīs quite a mesage as to scrool on a display of Microprofessor (this i know to do) - a Abort buttom to cancel the money in Sorry my english, i hope that you can help me. Thanks, and continue your great work. jotao@aeiou.pt