[Coco] CoCo 2 64K upgrade blues
Barry Nelson
barry.nelson at amobiledevice.com
Sun Aug 6 10:49:21 EDT 2017
Why would tying the pin to ground be any better than tying it high to VCC? I would say leave it tied to VCC as it is simpler and will work just as well. The only difference is which bytes in the chip end up getting used.
> Dave Philipsen dave at davebiz.comĀ <mailto:coco%40maltedmedia.com?Subject=Re%3A%20%5BCoco%5D%20CoCo%202%2064K%20upgrade%20blues&In-Reply-To=%3C26a6bdec-924b-6acc-c150-196cc8be47ea%40davebiz.com%3E>
> Sat Aug 5 15:14:08 EDT 2017
> So now that you have given more specific information about pin 1 it is
> easy to see that you should pull/bend pin 1 so that it resides outside
> of the socket. And the best would be to tie pin 1 of each chip to pin
> 16 (which is ground) of that chip. It would technically be better than
> tying all of the pins together and then to ground although that would
> probably work too. The idea of avoiding sporadic reads or writes is a
> valid one but still has nothing to do with whether the computer is
> 'used' or not. Maybe I am misinterpreting your use of the word 'used'.
>
> Leaving pin 1 in the socket (and therefore tied to Vcc) is probably ok
> too but the preferred method is as mentioned above.
>
> Dave
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