This page is show how to make the 8255 I/O (input and output) card that we use it in many project in thaiio web site here,So i would like to give this to you.
Please see the picture below for refer in make the 8255 I/O card ,it has 24 I/O for you using which this card will be put to ISA slot on your computer.
We have give the PCB layout too.So,you can copy it to paste on your PCB.
By the way,may be know working in electronic for check and verify the signal responsiveness of card which your make too.
|