So Here I Go!
I'm not a native english speaker so don't get mad of me
I'm performing a project for an ISA data adquisition card, so I investigated a little about the ISA bus and the PPI 8255 wich is a periperial programmable interphase, but what I need is to see the signals of the IOR, IOW, ALE, AEN and the adresses outputs in the ISA groove, so I connect them to some 74ls244 buses so I can see the signals on some leds. BUT, I don't see what I'm supposed to see when I program a simple outport() command in the turbo C++ 3.0, instead only noise is what I see. Maybe I'm wrong on what I must see? or What must I see?
I hope there's someone who has worked on ISA bus.
I'm not a native english speaker so don't get mad of me
I'm performing a project for an ISA data adquisition card, so I investigated a little about the ISA bus and the PPI 8255 wich is a periperial programmable interphase, but what I need is to see the signals of the IOR, IOW, ALE, AEN and the adresses outputs in the ISA groove, so I connect them to some 74ls244 buses so I can see the signals on some leds. BUT, I don't see what I'm supposed to see when I program a simple outport() command in the turbo C++ 3.0, instead only noise is what I see. Maybe I'm wrong on what I must see? or What must I see?
I hope there's someone who has worked on ISA bus.