On 09/17/2012 12:01 PM, firstname.lastname@example.org wrote: > > > The NAND version looks like this: > > https://dl.dropbox.com/u/58002657/rom_replacement_nand.png > > It has four pull-up resistors. You can eliminate 2 of them since a truly unused input can just be tied to +5V directly. That means R304 and R301 can be replaced by a direct trace to +5V. The other two you will need though since you have 2 inputs that need to be pulled to HIGH through a resistor in order you to be able to pull them to GND when needed without shorting the supply. I don't see how using a 148 would change that. Gerrit Message was sent through the cbm-hackers mailing listReceived on 2012-09-17 17:00:05
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