Re: 9316 rom adapter.

Eight, not nine.

(And you probably all thought I didn't read the messages any more!)

John Robertson wrote:

> 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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>
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Received on Thu Feb 8 04:21:48 2001