i want to used the dip switch to make multi codes

 

Go ahead that should work just fine.

hgmjr

 

You have my permission too.

 

http://www.iroczone.com/2009/10/understanding-how-the-code-switching-eprom-circuit-works/


Maybe this page will explain what you want to know???

 

Reminds me of the old days, it's also the reason the 8 position switches were so popular as 8 switches = 8 bits = one byte.

 

...or could it be that 8 position switches matched a standard 16 pin profile?