Johnny's homebuilt 8080 CPU corner (and other stuff, maybe)

 

Among the first XBUS boards I made a parallel IO board made sense.

 

But, instead of using a decicated chip for that I went on construction one from scratch.

It's much more fun that way.

 

This board has also gone through a few iterations before I got it to work properly.

 

There are a version 5.0 as a CAD file, using 74HC273 instead if 74HC175 but as long as the 4.0 version do its job I'm just going to let it sit there on the harddrive.

 

 

XBUS Parallel IO

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