RE: EPP or ECP based data transfer

From: Marko Mäkelä (
Date: 2000-01-07 10:51:31

On Fri, 7 Jan 2000, COPLIN, Nicholas. wrote:

> I'll see if this has the info you may need.

Thanks!  I guess even the biggest carts are smaller than 64 kilobytes,
which means that one static RAM chip is enough for the cartridge.

> I've build a kit A/D interface which got power from the LPT port by
> wiring together all data lines after putting the signals through
> diodes.

Thanks for the tip!  I'll need the data lines for the application, though.
I have three low-dropout diodes (0.2 to 0.3 volts) that I will try to
apply to some unused outputs.  If I have to use a separate connector for
stealing power, I could as well use e.g. the cassette port on the PET
side.  I wonder why there is no +5V or even RESET line on the PET user

> My guess is if you use the 74HC chip you might get away with it.

Too bad there isn't any electronics shop nearby.  When I bought the parts,
there weren't any HC or HCT versions in stock.


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