Re: 9316 rom adapter.

The trick is that 9316's could be mask programmed to have the three chip
selects either high or low. So you can have up to nine ROMs sharing the
same data bus and selected just by their chip selects.

John :-#)#

At 06:52 PM 05/02/2001, you wrote:
>o.k. i got my old data out and found my old adapter.
>
>pin: 2716 9316
>21 Vpp(high=read) CS(active-low)
>20 OE(active-low) CS(active low)
>18 CE(active-low) CS(ACTIVE HIGH)
>
>get 3 24pin chipsockets(machined pin type)
>
>on the first socket file-off the pins until you reach the wide section of
>tube on pins 18 and 21.
>
>then using very fine wire connect pins 20 and 21 on the underside of the
>socket.
>next connect pins 18 to 24 using a small (1/8 watt) resister 1k,4k7,10k
>any of these will do.
>
>YOU HAVE JUST MADE THE UPPER SECTION.
>
>next take the second socket and drill-out pins 18 and 21 so you are left
>with holes in the plastic carrier.
>
>now plug the sockets into each-other with the un-assulted socket on the
>bottom and the jumpered socket on top.
>not forgetting the drilled socket in he middle.
>
>check with a meter to make sure it's ok, and put some epoxy on the sides
>between the layers to keep it together.
>
>CONGRATULATIONS, YOU HAVE MADE AN ADAPTER THAT WILL LAST FOREVER!
>
>I have used this method to make 7 different adapters for everything from
>16pin proms(to 2716) to plcc package to dip. it looks very professional!
>
>TO PAUL SOMMERS.
>I forgot to say in my post to you, that if you replace a 9316 with a 2716
>you will need to change the pins on the pcb-socket aswell as use an
>adapter to read the originals.
>i know it seems obvious but it's the obvious stuff that we allways overlook :)
>
>L8r.
>
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Received on Mon Feb 5 23:11:41 2001