Eprom switcher

[Justin Albury]

Clare Snyder wrote:
> 
> I missed the start of this thread. What are you trying to accomplish? I have
> two eproms in the disk controller of my old COCO. They are connected in
> parallel, pin for pin, except for the enable pin, which has a simple spdt
> switch to select which prom is being accessed. This allowed use of two
> different operating systems, RSDOS and ADOS. I likely still have the diagram
> in an old Rainbow magazine somewhere.
> 

this method wont work on the delco system......it was my first attempt.
i have had good results from 1 chip split in half and switched with a
pulldown resistor ......one of the guys from the list told me to set it
up a little different to how i was doing it......and thankyou ...it
seems to be a better way of switching....but still only using 1 eprom 1
switch (spst) and 1 resistor ......also a lot smaller than 2 chips and
in a memcal i can still put the lids back on..

Justin