[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Apple II mistery card...



> But I have another mistery card: it has a 6522 (VIA) and another TTL IC on
> it, nothing else. It has a cable that ends in a 25 DSUB female connector.
It
> could be some kind of parallel port, or maybe it's this Apple mouse card I
> hear talking about. What do you gentlemen think?
>
>

Please post a picture of of both sides of this 6522 (VIA) card if you can.
I'm interested in building my own card with a 6522 and need to know
if the phase-0 clock signal on pin 40 of the peripheral bus needs to be
"delayed" before the 6522 sees this signal as phase-2.
A photo of both sides of this card would help tremendously!

thanks